Nissan XTrail T30 2006 User Manual

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Page 1

BRAKE CONTROL SYST EM

F BRAKES

SECTION BRC

BRAKE CONTROL SYSTEM

CONTENTS

ABS

PRECAUTIONS .......................................................... 4

Precautions for Supplemental Rest raint System (SRS) “AIR BAG” and “SEAT BELT PRE-TEN-

SIONER” .................................................................. 4

Precautions for Brake System .................................. 4

Precautions for Brake Control .................................. 4

PREPARATION ........................................................... 5

Commercial Service Tools ........................................ 5

SYSTEM DESCRIPTION ............................................ 6

System Diagram ....................................................... 6

Functions ........................ .................... ...................... 6

ABS ............................. .......................................... 6

EBD ............................. .......................................... 6

Operation That Is Not “System Error” ...................... 6

ABS ............................. .......................................... 6

Hydraulic Circuit Diagram ........................................ 7

CAN Communication ................................................ 7

SYSTEM DESCRIPTION ...................................... 7

TROUBLE DIAGNOSIS .............................................. 8

Fail-Safe Function .................................................... 8

ABS, EBD .............................................................. 8

How to Perform Trouble Diagnosis for Quick and

Accurate Repair ....................................................... 8

INTRODUCTION ............................. ............. ......... 8

DIAGNOSIS FLOW CHART ................................. 9

ASKING COMPLAINTS ...................................... 10

EXAMPLE OF DIAGNOSIS SHEET ................... 10

Component Parts Location ......................................11

Schematic .............................................................. 12

Wiring Diagram — ABS — ..................................... 13

Control Unit Input/Output Signal Standard ............. 17

REFERENCE VALUE FROM CONSULT-II ......... 17

CONSULT-II Functions (ABS) ................................ 18

CONSULT-II MAIN FUNCTION ........................... 18

CONSULT-II BASIC OPERATION PROCEDURE

... 18

SELF-DIAGNOSIS ............. ................................. 18

DATA MONITOR ................................................. 20

ACTIVE TEST ..................................................... 21

For Fast and Accurate Diagnosis ...........................23

PRECAUTIONS FOR DIAGNOSIS ..................... 23

Basic Inspection .....................................................23

BRAKE FLUID LEV EL, LEAKAGE AN D BRAKE

PAD ..................................................................... 23

POWER SUPPLY CIRCUIT TERMINAL LOOSE-

NESS AND BATTERY ......................................... 24

INSPECTION OF ABS WARNING LAMP ...........24

TROUBLE DIAGNOSIS FOR SYSTEM ... ...... ....... ....25

Wheel Sensor ......................................................... 25

INSPECTION PROCEDURE .............................. 25

ABS Actuator and Electric Unit (Control Unit) ........27

INSPECTION PROCEDURE .............................. 27

ABS Actuator and Electric Unit (Control Unit) Power

Supply and Ground .................................................27

INSPECTION PROCEDURE .............................. 27

ABS Actuator Relay or ABS Motor Relay ...............28

INSPECTION PROCEDURE .............................. 28

G Sensor (Only AWD Models) ................................29

INSPECTION PROCEDURE .............................. 29

CAN Communication ..............................................31

INSPECTION PROCEDURE .............................. 31

Component Inspection ............................................32

PARKING BRAKE SWITCH ................................32

BRAKE FLUID LEVEL SWITCH ......................... 32

TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 33

Excessive ABS Function Operation Frequency ...... 33

Unexpected Pedal Reaction ................................... 33

The Stopping Distance Is Long ............................... 34

ABS Function Does Not Operate ............................35

Pedal Vibration or ABS Operation Sound Occurs ...35

ABS Warning Lamp Indication Is Not Normal .........35

WHEEL SENSORS ................................................... 36

Removal and Installation ........................................ 36

COMPONENTS ..................... .............................. 36

REMOVAL ........................................................... 36

INSTALLATION ................................................... 36

SENSOR ROTOR ..................................................... 37

Removal and Installation (2WD Models) ................37

REMOVAL ........................................................... 37

BRC

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BRC-1

Page 2

INSTALLATION ....................................................37

Removal and Installation (AWD Models) ................37

REMOVAL ...........................................................37

INSTALLATION ....................................................37

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ...38

Removal and Installation ........................................38

COMPONENTS .................. .................................38

REMOVAL ...........................................................39

INSTALLATION ....................................................39

G SENSOR ................................................................ 40

Removal and Installation (Only AWD Models) ........40

REMOVAL ...........................................................40

INSTALLATION ....................................................40

VDC/TCS/ABS

PRECAUTIONS ........................ ...... ....... ...... ....... .......41

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TEN-

SIONER” ................... .......................... .................... 41

Precautions for Brake System ................................41

Precautions for Brake Control ................................ 41

PREPARATION .........................................................42

Commercial Service Tools .................. ...... ..............42

ON-VEHICLE SERVICE ............................................ 43

Adjustment of Steering Angle Sensor Neutral Posi-

tion ...................... .................................................... 43

SYSTEM DESCRIPTION .......................................... 44

System Diagram .....................................................44

Functions ................................................................ 44

ABS .....................................................................44

EBD .....................................................................44

ABLS (ACTIVE BRAKE LSD) ..............................44

TCS ..................................................................... 44

VDC ..................................................................... 45

Operation That Is Not “System Error” .....................45

ABS .....................................................................45

TCS ..................................................................... 45

VDC ..................................................................... 45

Hydraulic Circuit Diagram .......................................46

CAN Communication ..............................................46

SYSTEM DESCRIPTION ....................................46

TROUBLE DIAGNOSIS ............................................47

Fail-Safe Function ..................................................47

ABS, EBD, ABLS .................................................47

VDC/TCS ............................ .................................47

How to Perform Trouble Diagnosis For Quick and

Accurate Repair ......................................................47

INTRODUCTION ...................... ...........................47

DIAGNOSIS FLOW CHART ................................48

ASKING COMPLAINTS .......................................49

EXAMPLE OF DIAGNOSIS SHEET ....................49

Component Parts Location .....................................50

Schematic ................. ..............................................51

Wiring Diagram — VDC — .....................................52

Control Unit Input/Output Signal Standard ..............58

REFERENCE VALUE FROM CONSULT-II .........58

CONSULT-II Functions (ABS) .................................60

CONSULT-II MAIN FUNCTION ....... ...... ....... .......60

CONSULT-II BASIC OPERATION PROCEDURE

...61

SELF-DIAGNOSIS .......... .....................................61

DATA MONITOR .................................................64

ACTIVE TEST ......................................................66

For Fast and Accurate Diagnosis ............................68

PRECAUTIONS FOR DIAGNOSIS .....................68

Basic Inspection ......................................................69

BRAKE FLUID LEVEL, L EAKAGE AND BRAKE

PAD .................... .............................................. ....69

POWER SUPPLY CIRCUIT TERMINAL LOOSE-

NESS AND BATTERY .........................................69

ABS WARNING LAMP, BRAKE WARNING LAMP , VDC OFF INDICA T OR LAMP, A ND SLIP

INDICATOR LAMP ...............................................69

TROUBLE DIAGNOSIS FOR SYSTEM ....................71

Wheel Sensor ........................................ ...... ....... ....71

INSPECTION PROCEDURE ........................... ....71

Engine System ........................................................73

INSPECTION PROCEDURE ........................... ....73

VDC/TCS/ABS Control Unit ....................................73

INSPECTION PROCEDURE ........................... ....73

Pressure Sensor .....................................................73

INSPECTION PROCEDURE ........................... ....73

Steering Angle Sensor ............................................74

INSPECTION PROCEDURE ........................... ....74

Yaw Rate/Side G Sensor ........................................76

INSPECTION PROCEDURE ........................... ....76

Solenoid and VDC Switching Valve ........................77

INSPECTION PROCEDURE ........................... ....77

Actuator Motor and Motor Relay .............................79

INSPECTION PROCEDURE ........................... ....79

Actuator Relay ........................................................80

INSPECTION PROCEDURE ........................... ....80

Stop Lamp Switch Circuit ........................................81

INSPECTION PROCEDURE ........................... ....81

VDC/TCS/ABS Control Unit Power And Ground ....82

INSPECTION PROCEDURE ........................... ....82

Park/Neutral Position (PNP) Switch (Only A /T Mod-

els) ..........................................................................83

INSPECTION PROCEDURE ........................... ....83

Brake Fluid Level Switch .........................................84

INSPECTION PROCEDURE ........................... ....84

CAN Communication ..............................................85

INSPECTION PROCEDURE ........................... ....85

Component Inspection ............................................85

VDC OFF SWITCH ..............................................85

PA RKING BRAKE SWITCH .................................86

BRAKE FLUID LEVEL SWITCH ..........................86

MOTOR RELAY AND ACTUATOR RELAY .........86

VDC ACTUATOR .................................................87

TROUBLE DIAGNOSIS FOR SYMPTOMS ..............88

Excessive ABS Function Operation Frequency ......88

Unexpected Pedal Reaction ...................................88

The Stopping Distance Is Long ...............................89

ABS Function Does Not Operate ............................90

Pedal Vibration or ABS Operation Sound Occurs ...90

Vehicle Jerks During VDC/TCS/ABS Control ..........90

ABS Warning Lamp Indication Is Not Normal .........91

Revision: 2006 July 2006 X-Trail

BRC-2

Page 3

Slip Indicator Lamp Indication Is Not Normal ......... 91

VDC OFF Indicator Lamp Indication Is Not Normal ... 92

Brake Warning Lamp Indication Is Not Normal ...... 92

WHEEL SENSORS ................................................... 93

Removal and Installation ........................................ 93

COMPONENTS .................................................. 93

REMOVAL ........................................................... 93

INSTALLATION ................................................... 93

SENSOR ROTOR ..................................................... 94

Removal and Installation ........................................ 94

REMOVAL ........................................................... 94

INSTALLATION ................................................... 94

VDC/TCS/ABS CONTROL UNIT .............................. 95

Removal and Installation ........................................ 95

REMOVAL ........................................................... 95

INSTALLATION ................................................... 95

ACTUATOR ................................. .............................. 96

Removal and Installation ........................................ 96

COMPONENTS ..................... .............................. 96

REMOVAL ........................................................... 97

INSTALLATION ................................................... 97

G SENSOR ................................................................ 98

Removal and Installation ........................................ 98

REMOVAL ........................................................... 98

INSTALLATION ................................................... 98

STEERING ANGLE SENSOR .................................. 99

Removal and Installation ........................................ 99

REMOVAL ........................................................... 99

INSTALLATION ................................................... 99

VDC OFF SWITCH ..................................................100

Removal and Installation ......................................100

REMOVAL .........................................................100

INSTALLATION .................................................100

BRC

Revision: 2006 July 2006 X-Trail

BRC-3

Page 4

PRECAUTIONS

[ABS]

PRECAUTIONS PFP:00001 Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT

BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front sea t belt , helps t o redu ce th e r isk or s everi ty of injury to th e driv er an d front passenge r for c ertain types of collision. Info rmation necessary to service the system safely is included in the SRS and SB section of this Service Manual.

WARNING:

● To avoid rendering the SRS inoperativ e, which cou ld increase the risk of persona l injury or death

in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.

● Improper maintenance, in cluding incorrect removal a nd installation of the SRS, can lead to per-

sonal injury caused by unintentional activation of the system. For rem ova l of Sp iral Ca ble an d Air Bag Module, see the SRS section.

● Do not use electrical test equipme nt on any circuit related to the SRS unle ss instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors .

AFS002PO

Precautions for Brake System AFS002LO

● Recommended fluid is brake fluid “DOT 3”. Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRI-

CANTS"

● Do not reuse drained brake fluid.

● Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off

and flush area with water immediately.

● Do not use mineral oils such as ga soline or kerosene. They will ruin rubber parts of the hydraulic system.

● Use flare nut torque wrench when removing and installing brake

tube.

● Brake system is an important saf ety part. If a b rake fluid leak is

detected, always dis assembl e the affected part. If a malf unction is detected, replace part with a new one.

● Before working, turn ignition switch OFF and disconnect con-

nectors of ABS a ctua tor and electric u ni t (con trol unit) or batter y cables.

● When installing brake piping, be sure to check torque.

WARNING:

Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.

SBR686C

Precautions for Brake Control AFS002LP

● Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may

be heard from engine room. This is a normal status of opera tion check.

● When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-

tomer (what symptoms are present under what conditions) and check for simple causes before starting diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid leak s.

● If tire size and type are us ed in an imprope r combinat ion, or brake pads are not Genuine NISSAN parts,

stopping distance or steering stability may deteriorate.

● If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function

may have a malfunction or error.

● If aftermarket parts (car st ereo, CD pl ayer, etc.) have bee n installe d, ch eck f or inc iden ts such as h arness

pinches, open circuits, and improper wiring.

Revision: 2006 July 2006 X-Trail

BRC-4

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PREPARATION

[ABS]

PREPARATION PFP:00002

Commercial Service Tools AFS002PB

Tool name Description

1.Flare nut crowfoot a: 10 mm (0.39 in)

2.Torque wrench

Removing and installing each brake piping

S-NT360

BRC

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BRC-5

Page 6

SYSTEM DESCRIPTION

[ABS]

SYSTEM DESCRIPTION PFP:00000 System Diagram AFS002LR

SFIA2390E

Functions AFS002P6

ABS

● The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves

handling stability during sudden braking by el ectrically preventing 4 whe el lock. Maneuverabilit y is also improved for avoiding obstacles.

● Electrical System Diagnosis by CONSULT-II is av ailable.

EBD

● Electronic B rak e Dist ribut ion is a fu ncti on that det ect s subt le sl ipp ag es bet ween f ront and rea r whee ls du r-

ing braking, and it improves handling stability by electronically controlling Brake Fluid Pressure which results in reduced rear wheel slippage.

● Electrical System Diagnosis by CONSULT-II is av ailable.

Operation That Is Not “Sy stem Error” AFS002P7

ABS

● When starting engine or just after starting veh icle, brake pe dal may vibrate or the motor operatin g noise

may be heard from engine room. This is a normal states of the operation check.

● During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

● Stopping distance may be longer th an that o f vehi cles with out ABS when vehi cle d rives on rou gh, gra vel,

or snow-covered (fresh, deep snow) roads.

Revision: 2006 July 2006 X-Trail

BRC-6

Page 7

SYSTEM DESCRIPTION

[ABS]

Hydraulic Circuit Diagram AFS002LV

BRC

SFIA2479E

CAN Communication AFS0035N

SYSTEM DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during opera tion (not independent). In CA N communication, cont rol units are connected with 2 communicatio n lines ( CAN H lin e, CAN L li ne) all owi ng a high ra te of in forma tion tr ans missi on wit h less wir ing. Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-21, "

CAN Communication Unit" .

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BRC-7

Page 8

TROUBLE DIAGNOSIS

[ABS]

TROUBLE DIAGNOSIS PFP:00004 Fail-Safe Function AFS0038H

ABS, EBD

In case of electrical malfunction with ABS, ABS warning lamp will turn on. In case of electrical incident with EBD, ABS warning lamp will turn on. Simultaneously, ABS become one of following conditions of Fail-Safe function.

1. For ABS malfunction, o nl y EB D is activ at ed an d c on di tio n o f ve hi cl e i s sam e c o nd iti on of veh ic le s wi tho ut ABS function.

NOTE:

In step 1 shown abov e, self -diag nosi s wh en ig nitio n sw itch is t urned ON and when v ehic le starts at in itial time is performed. ABS self-d iagnosis noise may be heard as usual.

2. For EBD malfunction, EBD and ABS become inoperative, and condition of vehicle is same as condition of vehicles without ABS, EBD function.

How to Perform Trouble Diagnosis for Quick and Accurate Repair AFS002LX

INTRODUCTION

● To perform trouble diagnosis, it is the mos t important to have un derstandin g about veh icle syst ems (con -

trol and mechanism) thoroughly.

● It is also important to cla rify c ustom er compla ints befo re insp ec-

tion. First of all, reproduce symptom, and understand it fully. Ask customer about his/her complaint s carefully. I n some cases, it will be necessary to check symptom by driving vehicle with customer.

NOTE:

Customers are no t professionals. Do not assum e “maybe customer means...” or “maybe cus tomer mentioned this symptom”.

● It is essential to check symptoms right from beginning in order to

repair a malfunction completely. For an intermittent malfunction, it is important to reproduce symptom based o n interv iew wi th cust omer and past exam ples. Do not perform inspection on ad hoc basis. Most intermittent malfunctions are c a us ed b y poor contacts. In this c a se, it will be effective to shake suspected harness or connector by hand. When repairs are performed without any symptom check, no one can judge if malfunction has actually been eliminated.

● After diagnosis, make sure to perfo rm “e rase me mory”. Refer t o

BRC-19, "

● For an intermitten t malfunction, move harness or harness c on-

ERASE MEMORY" .

nector by hand to check poor contact or false open circuit.

● Always read “ GI section” to confirm general precautions. Refer to GI-4, "General Precautions" .

EFJ0028D

SEF233G

Revision: 2006 July 2006 X-Trail

BRC-8

Page 9

DIAGNOSIS FLOW CHART

TROUBLE DIAGNOSIS

[ABS]

BRC

PFIA0701E

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BRC-9

Page 10

TROUBLE DIAGNOSIS

ASKING COMPLAINTS

● Complaints vary depending on the person. It is important to clar-

ify the customer's actual remarks.

● Ask the customer about what symp toms are presen t and under

what conditions. Use the information to reproduce the symptom while driving.

● It is also imp ortant to us e diagnosis sheet so as not to miss vital

information.

EXAMPLE OF DIAGNOSIS SHEET

[ABS]

SBR339B

LFIA0176E

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BRC-10

Page 11

TROUBLE DIAGNOSIS

[ABS]

Component Parts Location AFS002LY

BRC

SFIA2391E

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BRC-11

Page 12

TROUBLE DIAGNOSIS

[ABS]

Schematic AFS002LZ

TFWB0019E

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BRC-12

Page 13

TROUBLE DIAGNOSIS

[ABS]

Wiring Diagram — ABS — AFS002M0

BRC

TFWB0020E

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BRC-13

Page 14

TROUBLE DIAGNOSIS

[ABS]

TFWB0003E

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BRC-14

Page 15

TROUBLE DIAGNOSIS

[ABS]

BRC

TFWB0021E

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BRC-15

Page 16

TROUBLE DIAGNOSIS

[ABS]

TFWB0022E

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BRC-16

Page 17

TROUBLE DIAGNOSIS

[ABS]

Control Unit Input/Output Signal Standard AFS002M1

REFERENCE VALUE FROM CONSULT-II

CAUTION:

The display shows the co ntrol unit ca lcula tion data, so a normal valu e might be displa yed ev en in the event the output circuit (harness) is open or short - circulated.

Data monitor

Data monitor item Display item

FR LH SENSOR FR RH SENSOR RR LH SENSOR RR RH SENSOR

DECEL G-SEN 1 DECEL G-SEN 2

ABS IN SOL ABS OUT SOL

STOP LAMP SW

MOTOR RELAY

ACTUATOR RELAY

ABS WARN LAMP

BATTER Y VOLT

EBD SIGNAL ABS SIGNAL

EBD FAIL SIG ABS FAIL SIG

Note 1: Confirm tire pressure is the standard value. Note 2: ABS warning lamp ON/OFF timing. ON: When the ignition switch is turned ON or when an err or is detect ed. OFF: After the ignition switch is turned ON (when syst em is norm al).

Wheel speed calculated using signals from all four wheel sensors

Fore-and-aft gravity detected by G sensor

Operation status of all solenoid valve

Brake pedal operation status

Motor and motor relay operation status

Actuator relay operation status

ABS warning lamp on condition (Note 2)

Battery voltage supplied to ABS actuator and electric unit (control unit)

EBD operation ABS operation

System fail signal status

Vehicle stopped 0 [km/h]

Vehicle running (Note 1)

When vehicle is stopped on level ground

When G sensor is tilted toward the front with G sensor mounting nuts removed

When the actuator solenoid operates or during a fail-safe

When the actuator relay operates and the actuator solenoid does not operate

Brake pedal depressed ON Brake pedal not depressed OFF When the motor relay and

motor are operating When the motor relay and

motor are not operating When the actuator relay is

operating When the actuator relay is not

operating When ABS warning lamp is

ON When ABS warning lamp is

OFF

Ignition switch ON 10 - 16 V

EBD active ABS active

EBD not active ABS not active

EBD Fail ABS Fail

EBD normal ABS normal

Condition

Reference values

in normal opera-

tion

Nearly matches the speedometer display (± 10 % or less)

OFF

Reference: Inspection

item

BRC-25, "

BRC-29, " (Only AWD Models)"

BRC-28, " Relay or ABS Motor Relay"

Stop lamp switch circuit

BRC-28, " Relay or ABS Motor Relay"

BRC-24, " OF ABS WARNING LAMP"

BRC-27, " and Electric Unit (Control Unit) Power Supply and Ground"

EBD system ABS system

Wheel Sensor"

G Sensor

ABS Actuator

INSPECTION

ABS Actuator

BRC

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BRC-17

Page 18

TROUBLE DIAGNOSIS

[ABS]

CONSULT-II Functions (ABS) AFS002M2

CONSULT-II MAIN FUNCTION

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

Diagnostic

test mode

SELF-DIAGNOSTIC RESULTS

DATA MONITOR

CAN DIAG SUPPORT MNTR

ACTIVE TEST

FUNCTION TEST

ECU PART NUMBER

Self-diagnostic results can be read and erased quickly. BRC-18, "

Input/Output data in the ABS actuator and electric unit (control unit) can be read. BRC-20, "

The result of transmit/receive diagnostic of CAN com m uni cation can be read.

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ABS actuator and electric unit (control unit) and also shifts some parameters in a specified range.

This mode is used to inform customers when their vehi cl e condition requires periodic maintenance.

ABS actuator and electric unit (control unit) part number can be read. —

Function Reference

Self-Diagnosis"

Data Monitor"

LAN-13, "

“CONSULT-II OPERATION

MANUAL (FUNCTION

CAN Diagnostic

Support Monitor"

BRC-21, "Active Test"

Separate volume

TEST)”

CONSULT-II BASIC OPERATION PROCEDURE

1. Touch “ABS” in the “SELECT SYSTEM” screen.

2. Select the required diagnostic location from the “SELECT DIAG MODE” screen.

BCIA0030E

BCIA0031E

SELF-DIAGNOSIS OPERATION PROCEDURE

1. Turn ignition switch OFF.

2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.

3. Turn ignition sw itch ON.

4. Start engine and drive vehicle at 30 km/h (19 MPH) or more for appro xi ma tely 1 minute.

5. After stopping vehicle, with the engine running, touc h “START (NISSAN BASED VHCL)”, “ABS”, “SELFDIAG RESULTS” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

Revision: 2006 July 2006 X-Trail

CONSULT-II Data Link Connector (DLC) Circuit" .

BRC-18

Page 19

TROUBLE DIAGNOSIS

[ABS]

6. The self-dia gn os ti c resu lt s ar e d is pla yed . ( Touch “PRINT” to pr in t out se lf -d ia gn os tic r e sul t s, i f nece ss ar y. )

● Check ABS warn ing lamp if “NO FAILURE” is displayed.

7. Perform the appropriate inspection from the display item list, and repair or replace the malfunction ing component. Refer to BRC-19, "

8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.

CAUTION:

When the wheel sensor malfunc tions, a fter inspec ting the w heel se nsor sys tem, the ABS warni ng lamp will not turn off even when the s ystem is normal unless the vehicle is driving at approx imately 30 km/h (19 MPH) or more for approximately 1 minute.

DISPLAY ITEM LIST" .

ERASE MEMORY

1. Turn ignition switch OFF.

2. Start engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE MEMORY” in order on the CONSULT-II screen to erase the error memory.

CAUTION:

If the error memory is not erased, re-perform the operation from step 4.

3. Perform sel f-diagnosis again, and make sure that diagnostic memory is erased.

4. Drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp is turned off.

DISPLAY ITEM LIST

Diagnostic item Malfunction is detected when... Check circuit FR LH SENSOR – 1 Circuit of front LH wheel sensor is open. RR RH SENSOR – 1 Circuit of rear RH wheel sensor is open. FR RH SENSOR – 1 Circuit of front RH wheel sensor is open. RR LH SENSOR – 1 Circuit of rear LH wheel sensor is open.

When the circuit in the front LH wheel sensor is short -circ ui te d. Or when the sensor power voltage is outside the standard. When

FR LH SENSOR – 2

RR RH SENSOR – 2

FR RH SENSOR – 2

RR LH SENSOR – 2

MAIN RELAY When the control unit detects an error in the actuator relay circuit.

the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he control unit.

When the circuit in the rear RH wheel sensor is short- circ ui te d. Or when the sensor power voltage is outside the standard. When the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he control unit.

When the circuit in the front RH wheel sensor is shor t-ci rcu ited. Or when the sensor power voltage is outside the standard. When the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he control unit.

When the circuit in the rear LH wheel sensor is short-circuited. Or when the sensor power voltage is outside the standard. When the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he control unit.

BRC-25, "

(Note 1)

BRC-28, " Relay or ABS Motor Relay"

Wheel Sen sor"

ABS Actuator

BRC

Revision: 2006 July 2006 X-Trail

BRC-19

Page 20

TROUBLE DIAGNOSIS

[ABS]

Diagnostic item Malfunction is detected when... Check circuit

FR LH IN ABS SOL

FR LH OUT ABS SOL

RR RH IN ABS SOL

RR RH OUT ABS SOL

FR RH IN ABS SOL

FR RH OUT ABS SOL

RR LH IN ABS SOL

RR LH OUT ABS SOL

LOW POWER VOLTAGE

ABS CONTROLLER

CAN COMM CIRCUIT When there is an error in the CAN communication circuit.

PUMP MOTOR

G SENSOR (Only AWD model)

Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure that ABS warning lamp turns off w hile driving vehi cle at 30 km/h (19 MPH) or m ore for approximat ely 1 minute according to se lf-diagnosis procedure. In addition, if wheel sensor 2 is displ ay ed fo r wheel s, check wheel sensor circuit and also check control unit power voltage. Note 2: When e rrors ar e detected in seve ral syst ems, in cluding CAN com municat ion c ircuit [ U1000 ], troubl eshoot CA N co mmun ication circuit. Refer to LAN-16, "

CAN COMMUNICATION" .

When the control unit detects an error in the front left inlet solenoid circuit.

When the control unit detects an error in the front left outlet solenoid circuit.

When the control unit detects an error in the rear right inlet solenoid circuit.

When the control unit detects an error in the rear right outlet solenoid circuit.

When the control unit detects an error in the front right inlet solenoid circuit.

When the control unit detects an error in the front right outlet solenoid circuit.

When the control unit detects an error in the rear left inlet solenoid circuit.

When the control unit detects an error in the rear left outlet solenoid circuit.

When the ABS actuator and electric unit (control unit) power voltage is lower than normal.

When there is an internal error in the ABS actuator and electric unit (control unit).

During actuator motor operation with ON, when actuator motor turns OFF or when control line for actuator motor relay is open.

G sensor is malfunctioning, or signal line of G sensor is ope n or shorted.

BRC-28, " Relay or ABS Motor Relay"

BRC-27, " and Electric Unit (Control Unit) Power Supply and Ground"

BRC-27, " and Electric Unit (Control Unit)"

BRC-31, "CAN Communication" (Note 2)

BRC-28, " Relay or ABS Motor Relay"

BRC-29, " (Only AWD Models)"

ABS Actuator

G Sensor

DATA MONITOR OPERATION PROCEDURE

1. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

CONSULT-II Data Link Connector (DLC) Circuit" .

2. At the monitor item selecti on screen, touch one of th e items “ECU INPUT SIGNALS”, “MA IN SIGNALS” or. “SELECTION FROM MENU”.

3. Touch “START” to proceed to the data monitor screen.

DISPLAY ITEM LIST

×: Standard –: Not applicable

SELECT MONITOR ITEM

Data monitor item (Unit )

FR LH SENSOR [km/h]

FR RH SENSOR [km/h]

Revision: 2006 July 2006 X-Trail

ECU INPUT SIG-

NALS

×××

MAIN SIGNALS

SELECTION

FROM MENU

BRC-20

Wheel speed calculated by front LH whee l sensor signal is displayed.

Wheel speed calculated by front RH wheel sensor signal is displayed.

Remarks

Page 21

TROUBLE DIAGNOSIS

[ABS]

Data monitor item (Unit)

RR LH SENSOR [km/h]

RR RH SENSOR [km/h]

DECEL G-SEN 1 (ON/OFF) (Only AWD model)

DECEL G-SEN 2 (ON/OFF) (Only AWD model)

FR LH IN SOL (ON/OFF)

FR LH OUT SOL (ON/OFF)

RR RH IN SOL (ON/OFF)

RR RH OUT SOL (ON/OFF)

FR RH IN SOL (ON/OFF)

FR RH OUT SOL (ON/OFF)

RR LH IN SOL (ON/OFF)

RR LH OUT SOL (ON/OFF)

STOP LAMP SW (ON/OFF)

MOTOR RELAY (ON/OFF)

ACTUATOR RLY (ON/OFF)

ABS WARN LAMP (ON/OFF)

BATTERY VOLT (V )

EBD SIGNAL (ON/OFF)

ABS SIGNAL (ON/OFF)

EBD FAIL SIG (ON/OFF)

ABS FAIL SIG (ON/OFF)

SELECT MONITOR ITEM

ECU INPUT SIG-

NALS

×××

×××G sensor 1 (ON/OFF) status is displayed.

×××G sensor 2 (ON/OFF) status is displayed.

– ××

×××

– ××

×××

––× EBD operation (ON/OFF) status is displayed.

––× ABS operation (ON/OFF) status is displayed.

––×

MAIN SIGNALS

SELECTION

FROM MENU

Wheel speed calculated by rear LH wheel sensor signal is displayed.

Wheel speed calculated by rear RH wheel sensor signal is displayed.

Front left inlet ABS solenoid valve (ON/OFF) status is displayed.

Front left outlet ABS solenoid valve (ON/OFF) status is displayed.

Rear right inlet ABS solenoid valve (ON/OFF) status is displayed.

Rear right outlet ABS solenoid valve (ON/ OFF) status is displayed.

Front right inlet ABS solenoid valve (ON/OFF) status is displayed.

Front right outlet ABS solenoid valve (ON/ OFF) status is displayed.

Rear left inlet ABS solenoid valve (ON/OFF) status is displayed.

Rear left outlet ABS solenoid valve (ON/OFF) status is displayed.

Stop lamp switch (ON/OFF) status is displayed.

ABS motor relay (ON/OFF) condition is displayed.

ABS actuator relay (ON/OFF) status is displayed.

ABS warning lamp (ON/OFF) status is displayed.

The voltage supplied to the ABS actuator and electric unit (control unit) is displayed.

EBD fail-safe signal (ON/OFF) status is displayed.

ABS fail-safe signal (ON/OFF) status is displayed.

Remarks

BRC

ACTIVE TEST

CAUTION:

● Do not perform ACTIVE TEST while driving vehicle.

● Make sure to completely bleed air from the brake system.

● Active test cannot be performed when ABS or EBD operation is malfunction.

Revision: 2006 July 2006 X-Trail

BRC-21

Page 22

TROUBLE DIAGNOSIS

[ABS]

OPERATION PROCEDURE

1. Connect CONSULT-II and CONVERTER to data link connector and start engine.

2. Touch “START (NISSAN BASED VHCL)”, “ABS”, “ACTIVE TEST” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

3. The “ SELECT TEST ITEM” screen is displayed.

4. Touch necessary test item.

5. Touch “START” with “MAIN SIGNALS” line inverted.

6. ACTIVE TEST screen will be displayed, so perform the following test.

● Solenoid valve

● ABS motor

NOTE:

● When active tes t is pe r for me d whi l e de pre ssi n g peda l, pe da l dep r ess io n amou nt wil l cha ng e, bu t t hi s

is normal.

● Approximately 10 seconds after operation has begun, “TEST STOP” will be displayed.

● To perform a retest after “TEST STOP” is displayed, touch “BACK” and perform test from step 3.

CONSULT-II Data Link Connector (DLC) Circuit" .

SFIA2085E

SOLENOID VALVE

NOTE:

The example shown is for the front right wheel. The procedure for the other wheels is the same as given below.

1. For ABS solenoid valve, touch “UP”, “KEEP”, and “DOWN”. Then use screen monitor to make sure solenoid valve op erates as shown in Solenoid Valve Operation Chart.

SFIA0678E

Solenoid Valve Operation Chart

Operation

FR RH IN SOL OFF ON ON FR RH OUT SOL OFF OFF ON*

*: ON for 1 to 2 seconds after the touch, and then OFF

UP KEEP DOWN

ABS solenoid valve

Revision: 2006 July 2006 X-Trail

BRC-22

Page 23

TROUBLE DIAGNOSIS

ABS MONITOR

Touch “ON”, “OFF” of the display screen, and make sure if ABS motor relay and ABS actuator relay are operating as given in the following table.

Operation ON OFF MOTOR RELA Y ON OFF ACTUATOR RLY ON ON

[ABS]

SFIA0593E

For Fast and Accurate Diagnosis AFS002M4

PRECAUTIONS FOR DIAGNOSIS

● Be sure to check the procedures of “How to Perform Trouble Diagnosis” in advance. Refer to GI-4, "Gen-

eral Precautions" .

● Always erase memory after completing trouble diagnosis. Refer to BRC-19, "ERASE MEMORY" .

● When checking continuity and voltage between units, be sure to check for disconnection, looseness,

bend, or collapse for connector terminals. Repair or replace applicable part if any non-standard condition is detected.

● Intermittent malfunctions may be caused by a poor connection in the harness, connectors, and terminals.

Move harnesse s, ha rness co nnector s, an d termin als by hand to make sure all conne ctions are sol id and undamaged.

● Do not to forcibly extend any connector terminal if a circuit tester is used for the check.

● The symptom shown in the table be low may occur, but the system is operat ing normally.

Symptom Symptom description Result

This is the operation noise of the motor in the actuator, and there may

Motor operation noise

System operation check noise

ABS operation (Longer stopping distance)

be a slight sound during ABS operation. Just after the engine starts, the motor operating noise may be hea rd.

This is a normal status of the system operation check. When engine starts, “click” noise may be heard from engine room. This

is normal status of system operation check. When driving on roads with a low coefficient of friction, suc h as snow y

roads or gravel roads, the stopping distance is sometimes longer for vehicles equipped with ABS. Therefore, when driving on such roads, drive at a sufficiently reduced speed to be safe.

Normal

BRC

ON and OFF Timing for ABS Warning Lamp

×: ON —: OFF

Condition ABS warning lamp Ignition switch OFF − When ignition switch is turned ON × After ignition switch is turned ON (Whe n syst em is norm al ) − ABS error × EBD error ×

Basic Inspection AFS002M5

BRAKE FLUID LEVEL, LEAKAGE AND BRAKE PAD

1. Check fluid le vel in the brake fluid reservoir tank. Refill the brake fluid if fluid level is low.

2. Check the area around the brake piping and ABS actuator and electric unit (control unit) for leakage. If leakage or oozi ng is detected, check as follows:

● If ABS actuator and electric unit (control unit) connections are loose, tighten piping to the specified

torque. Check again for leakage, and make sure that there is no fluid leakage.

Revision: 2006 July 2006 X-Trail

BRC-23

Page 24

TROUBLE DIAGNOSIS

[ABS]

● If the flare nuts a t t he co nnec tion s and the thread s of the a ctua tor are dam aged , repl ace t he da mag ed

parts. Then check again for leakage, and make sure that there is no fluid leakage.

● If leakage or oozing is detected on parts other than actuator connections, wipe with a clean cloth and

check again. I f there is still leakage or oozing, replace the damaged part.

● If leakage o r oozing is detected on actuator bo dy, wipe with a clean clot h and chec k again. If t here is

still leakage or oozing, replace ABS actuator and electric unit (control unit).

CAUTION:

ABS actuator and electric unit (control unit) cannot be disassembled.

3. Check brake disc ro to r an d pads . F ron t di sc ro tor: BR-30, "

25, "PAD WEAR INSPECTION" , Rear disk rotor: BR-35, "DISC ROTOR INSPECTION" , Rear pad : BR31, "PAD WEAR INSPECTION" .

POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY

Check battery for looseness on the battery positive/negative terminals and ground connection. Also make sure that battery voltage does not drop.

INSPECTION OF ABS WARNING LAMP

1. Make sure that when the ignition switch is turned ON, the ABS warning lamp turns on. If it is does not turn on, perform CAN communication circuit diagnosis. Refer to BRC-31, " warning lamp if there is no malfunction in CAN commu nication circuit. Refer to BRC-35, "

Lamp Indication Is Not Normal" .

2. Check if the ABS warning lamp turns off after the ignition switch is turned ON after the engine is started. If it does not turn off, perform self-diagnosis.

3. If ABS warning lamp has not turned off after 10 seconds the engine has been started, perform self-diagnosis of the ABS actuator and electri c un it (co ntro l un it).

4. Always erase the self-diagnostic results after completing self-diagnosis. Refer to BRC-19, "

ORY" .

DISC ROTOR INSPECTION" , Front pad: BR-

CAN Communication" . Check ABS

ABS Warning

ERASE MEM-

Revision: 2006 July 2006 X-Trail

BRC-24

Page 25

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

TROUBLE DIAGNOSIS FOR SYSTEM PFP:00000

Wheel Sensor AFS002M6

INSPECTION PROCEDURE

Check each part according to CONSULT-II self-diagnostic results, and then identify the parts to be replaced.

CAUTION:

Do not check between wheel sensor terminals.

1. CHECK TIRES

Check air pressure, wea r and size. Are air pressur e, wear and size within standard values?

YES >> GO TO 2. NO >> Adjust air pressure, or replace tire.

2. CHECK SENSOR AND SENSOR ROTOR

● Check sensor rotor for damage.

● Check wheel sensor for damage, disc onnection or looseness.

OK or NG

OK >> GO TO 3. NG >> Repair wheel sensor mount or replace sensor rotor. Refer to BRC-37, "

36, "WHEEL SENSORS" .

3. CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Self-diagnostic results FR RH SENSOR-1, -2 FR LH SENSOR-1, -2

RR RH SENSOR-1, -2

RR LH SENSOR-1, -2

Is above displayed on self-diagnosis display?

YES >> GO TO 4. NO >> INSPECTION END

4. CHECK CONNECTOR

SENSOR ROTOR" , BRC-

BRC

1. Turn ignition switch OFF and di sconnect ABS actuator and el ectric unit (cont rol unit) conne ctor and malfunctioning wheel sensor connector. Check terminal to see if it is deformed, disconnected, loose, etc., and repair or replace it if any malfunction condition is found.

2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then perform self-diagnosis.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, dama ged, open or shorted. NO >> GO TO 5.

Revision: 2006 July 2006 X-Trail

BRC-25

Page 26

TROUBLE DIAGNOSIS FOR SYSTEM

5. CHECK WHEEL SENSOR HARNESS

1. Turn ignition switch OFF and disconnect malfunctioning wheel sensor connector and ABS actuator and electric unit (control unit) connector.

2. Check continuity between terminals. (Also check continuity when the steering wheel is turned right and left and when the sensor harness inside the wh eel house is moved.)

Power supply circuit Signal circuit Gr ound circuit

ABS actuator

and electric

Wheel

Front RH (E17) 24 1 9 2 24, 9 Front LH (E59) 22 1 7 2 22, 7 Rear RH (B130) 28 1 13 2 28, 13 Rear LH (B126) 26 1 11 2 26, 11

unit (control

unit)

harness con-

nector E69

Wheel sensor (harness con-

nector)

ABS actuator

and electric unit (control

unit)

harness con-

nector E69

Wheel sensor (harness con-

nector)

ABS actuator and elec-

tric unit (control unit)

harness connector E69

(signal)

[ABS]

SFIA2015E

Ground

—

Power supply circuit : Continuity should exist. Signal circuit : Continuity should exist. Ground circuit : Continuity should not exist.

OK or NG

OK >> GO TO 6. NG >> Repair or replace harness and connector that have malfunction.

6. CHECK WHEEL SENSOR

1. Replace w heel sensor tha t resulted in malfunction by self-diagnosis.

2. Reconnect conn ectors, dri ve vehicle a t 30 km/h (19 MPH) or mo re for approx imately 1 min ute, and th en perform self-diagn os is .

Self-diagnostic results FR RH SENSOR-1, -2 FR LH SENSOR-1, -2 RR RH SENSOR-1, -2 RR LH SENSOR-1, -2

Is above displayed on self-diagnosis display?

YES >> Wheel sensor has malfunction. NO >>

● Replace ABS actuator and electric unit (control unit).

● Perform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.

FURTHER TESTING MAY BE REQUIRED”.

Revision: 2006 July 2006 X-Trail

BRC-26

Page 27

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

ABS Actuator and Electric Unit (Control Unit) AFS002M7

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

ABS CONTROLLER

Is above displayed on self-diagnosis display?

YES >> Replace ABS actuator and electric unit (control unit), and perform self-diagnosis again. NO >> INSPECTION END

ABS Actuator and Electric Unit (Control Unit) Power Supply and Ground AFS002M8

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

LOW POWER VOLTAGE

Is above displayed on self-diagnosis display?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or replace the terminal.

2. Connect the connector securely and perform se lf-diagnosis again.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, dama ged, open or shorted. NO >> GO TO 3.

BRC

Revision: 2006 July 2006 X-Trail

BRC-27

Page 28

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND

1. Turn ignition s witch OFF and disconnect ABS actuator and electric unit (control unit) connector.

2. Turn ignition switch ON or OFF, and then check continuity and voltage between each connector terminal and ground.

ABS actuator and electric

Signal

Power supply

Signal

Ground 16, 30 —

unit (control unit) harness connector E69

ABS actuator and electric unit (control unit) harness connector E69

Ground

—

Ground

Measure-

ment con-

dition

Ignition

switch ON

Ignition

switch

OFF

Measure-

ment con-

dition

Ignition

switch OFF

Volrtage

Battery voltage

(Approx. 12 V)

Approx. 0 V

SFIA2087E

Continuity

Yes

OK or NG

OK >> Check battery for terminal looseness, low voltage, etc. If

any malfunction is found, repair malfunctioning parts.

NG >> Corresponding harness circuit malfunctions. Repair cir-

cuit, and perform self-diagnosis again.

SFIA2089E

ABS Actuator Relay or ABS Motor Relay AFS002M9

INSPECTION PROCEDURE

1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND

CIRCUIT

Check the self-diag nostic results.

Self-diagnostic results

FR LH IN ABS SOL

FR LH OUT ABS SOL

RR RH IN ABS SOL

RR RH OUT ABS SOL

FR RH IN ABS SOL

FR RH OUT ABS SOL

RR LH IN ABS SOL

RR LH OUT ABS SOL

MAIN RELAY

PUMP MOTOR

Is above displayed on self-diagnosis display?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

BRC-28

Page 29

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

2. CHECK CONNECTOR

2. Connect the connector securely and perform se lf-diagnosis again.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, dama ged, open or shorted. NO >> GO TO 3.

3. CHECK ABS ACTUATOR RELAY OR ABS MOTOR RELAY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector.

2. For the ABS actuator relay, measure voltage between the harness connector terminal 15 and ground. For the ABS motor relay, measure voltage between the harn ess conn ector term inal 1 and ground.

ABS actuator and electric unit (control

unit) harness connector E69

1, 15 —

OK or NG

OK >> GO TO 4. NG >> Circuit malfunction between t he battery and ABS actua-

tor and electric unit (control unit). Repair circuit.

Ground Voltage

Battery voltage (Approx.

12 V)

SFIA2110E

BRC

4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

Check continuity between ABS actuator and electric unit (control unit) harness connector E69 terminals 16, 30 and ground.

ABS actuator and electric unit (control

unit) harness connector E69

16, 30 — Yes

Ground Continuity

OK or NG

OK >> Replace ABS actuator and electric unit (control unit). NG >> Open or short in harness. Repair or replace the harness,

and perform self-diagnosis again.

SFIA2089E

G Sensor (Only AW D Models) AFS002P9

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Self-diagnostic results

G SENSOR

Is above displayed on self-diagnosis display?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

BRC-29

Page 30

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

2. CHECK CONNECTOR

1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) and G sensor connector, and check th e t erm in al for def orm at ion , di sc on nect i on , loo sen es s, and so o n. If th er e is a ma lf u nction, repair or replace the terminal.

2. Reconnect connector securely, and perform self-diagnosis.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

3. CHECK G SENSOR HARNESS

1. Turn ignition switch OFF and disconn ect G sensor and ABS a ctuator and elec tric unit (control u nit) connectors.

2. Check continuity betwee n G sensor harness connecto r M57 and ABS actuator and electric unit (control unit) harness connector E69.

G sensor harness

connector M57

1 21 2 12 3 10 425

ABS actuator and elec-

tric unit (control unit) har-

ness connector E69

Continuity

Yes

SFIA2438E

OK or NG

OK >> GO TO 4. NG >> Circuit malfun ction between G sensor and ABS actua tor and electric unit (control un it). Repair

harness.

4. CHECK G SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition sw itch ON.

2. Check voltage between G sensor harness connector M57 terminal 5 and ground.

Voltage : Battery voltage (Approx. 12 V)

SFIA2439E

OK or NG

OK >> GO TO 5. NG >> G sensor power supply circuit malfunction. Repair circuit.

Revision: 2006 July 2006 X-Trail

BRC-30

Page 31

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

5. CHECK G SENSOR

1. Remove G sensor from the vehicle. Refer to BRC-40, "

2. Connect the f ollowi ng termin als betw een G se nsor and connec tor.

G sensor connector Harness connector M57

11 2 2 5 5

3. Check voltage be tween the following G sensor terminals when ignition switc h turns ON an d G sensor is in the follo wing condition.

G sensor status

Horizontal Approx. 5 V Approx. 5 V Longitudinally tilt by 20° Approx. 10 V Approx. 10 V Longitudinally tilt by 40° Approx. 5 V Approx. 10 V

G sensor connector ter-

minal 5-4

G sensor connector ter-

G SENSOR" .

minal 5-3

SFIA2440E

BRC

SFIA2441E

OK or NG

OK >> ABS actuator and elect ric unit (control un it) malfunction. Repla ce ABS actuator and electric unit

(control unit).

NG >> G sensor malfunction. Replace G sensor, and perform self-diagnosis.

CAN Communication AFS002MC

INSPECTION PROCEDURE

1. CHECK CONNECTOR

2. Connect connector securely and perform self-diagnosis again.

Self-diagnostic results

CAN COMM CIRCUIT

Is above displayed on self-diagnosis display?

YES >> Print out the self-diagnostic results and refer to LAN-4, "TROUBLE DIAGNOSES WORK FLOW" . NO >> Connector terminal connector is loose, damaged, open or shor ted.

Revision: 2006 July 2006 X-Trail

BRC-31

Page 32

TROUBLE DIAGNOSIS FOR SYSTEM

[ABS]

Component Inspection AFS002QA

PARKING BRAKE SWITCH

Refer to DI-25, "Wiring Diagram — WARN —" , and check parking brake switch.

BRAKE FLUID LEVEL SWITCH

Refer to DI-25, "Wiring Diagram — WARN —" , and check brake fluid level switch.

Revision: 2006 July 2006 X-Trail

BRC-32

Page 33

TROUBLE DIAGNOSIS FOR SYMPTOMS

[ABS]

TROUBLE DIAGNOSIS FOR SYMPTOMS PFP:00007

Excessive ABS Function Operation Frequency AFS002MD

1. CHECK START

Check longitudinal brake force distribution using a brake tester. Refer to BR-37, "

IFICATIONS (SDS)" .

OK or NG

OK >> GO TO 2. NG >>

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

– Brake booster. Refer to BR-21, "BRAKE BOOSTER" . – Hydraulic line. Refer to BR-11, "BRAKE PIPING AND HOSE" . – Front brake caliper. Refer to BR-25, "FRONT DISC BRAKE" . – Rear brake caliper. Refer to BR-31, "REAR DISC BRAKE" .

SERVICE DA TA AND SPEC-

2. CHECK FRONT AND REAR AXLE

Make sure that there is no excessive play in the front and rear axles. Refer to Front: FSU-6, "

Inspection and Service" , Rear: RSU-5, "O n-Vehicle Inspectio n an d Serv ic e" .

OK or NG

OK >> GO TO 3. NG >> Repair.

On-Vehicle

3. CHECK WHEEL SENSOR AND SENSOR ROTOR

Check wheel sensor an d se ns or roto r for the fol lo win g.

● Wheel sensor installation for damage

● Wheel sensor rotor installation for damage

● Wheel sensor conn ector connection

● Wheel sensor harness inspection

OK or NG

OK >> GO TO 4. NG >>

● Replace wheel sensor or sensor rotor.

● Repair harness.

4. CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. OK or NG

OK >> Normal NG >> Perform self-diagnosis. Refer to BRC-18, "

Self-Diagnosis" .

BRC

Unexpected Pedal Reacti on AFS002ME

1. CHECK BRAKE PEDAL STROKE

Check brake pedal stroke. Refer to BR-6, " Is the stroke too big?

YES >> ● Bleed air from the brake piping. Refer to BR-10, "Bleeding Brake System" .

● Check brake pe dal, brake boos ter, and master cylinder for m ount play, looseness, brake sy s-

tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal: BR-7, " brake booster and master cylinder: BR-22, "

NO >> GO TO 2.

Revision: 2006 July 2006 X-Trail

Inspection and Adjustment" .

COMPONENTS" ,

COMPONENTS" .

BRC-33

Page 34

TROUBLE DIAGNOSIS FOR SYMPTOMS

[ABS]

2. CHECK FUNCTION

Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is normal in thi s condition. Connect connector after inspection.

OK or NG

OK >> GO TO procedure 3″CHECK WHEEL SENSOR AND SENSOR ROTOR″. Refer to BRC-33,

"Excessive ABS Function Operatio n Freq ue nc y " .

NG >>

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

The Stopping Distance Is Long AFS002MF

CAUTION:

The stopping distance on slippery road surfaces might be longer wi th the ABS operating tha n when the ABS is not operating.

1. CHECK FUNCTION

Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. In this condition, check stopping distance. After inspection, connect connector.

OK or NG

OK >> GO TO procedure 3 "CHECK WHEEL SENSOR AND SENSOR ROTOR". Refer to BRC-33,

"Excessive ABS Function Operatio n Freq ue nc y " .

NG >>

● Bleed air from the brake piping. Refer to BR-10, "Bleeding Brake System" .

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

Revision: 2006 July 2006 X-Trail

BRC-34

Page 35

TROUBLE DIAGNOSIS FOR SYMPTOMS

[ABS]

ABS Function Does Not Operate AFS002MG

CAUTION:

ABS does not operate when speed is 10 km/h (6 MPH) or lower.

1. CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. OK or NG

OK >> GO TO procedure 3″CHECK WHEEL SENSOR AND SENSOR ROTOR″. Refer to BRC-33,

"Excessive ABS Function Operation Frequency" .

NG >> Perform self-diagnosis. Refer to BRC-18, "

Pedal Vibration or ABS Operation Sound Occurs AFS002MH

CAUTION:

Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed (just place a foot on it). However, this is normal.

● When shifting gears

● When driving on slippery road

● During cornering at high speed

● When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]

● When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or more]

Self-Diagnosis" .

BRC

1. SYMPTOM CHECK 1

Check if there is pedal vibration or operation noise when the engine is started. Do symptoms occur?

YES >> GO TO 2. NO >> Perform self-diagnosis. Refer to BRC-18, "

Self-Diagnosis" .

2. SYMPTOM CHECK 2

Check symptoms when electrical component (headlamps, etc.) switches are operated. Do symptoms occur?

YES >> Check if there is a r adio, antenna, antenna lead wire, or wiring close to the control unit. If there is,

move it farther away.

NO >> GO TO procedure 3″CHECK WHEEL SENSOR AND SENSOR ROTOR″. Refer to BRC-33,

"Excessive ABS Function Operation Frequency" .

ABS Warning Lamp Indication Is Not Normal AFS002QB

NOTE:

Lighting condition of ABS warning lamp refer to BRC-23, "

ON and OFF Timing for ABS Warning Lamp" .

1. CHECK COMBINA TION METER INDICATION

Check the combin ation mete r indication and operation. Re fer to DI-14, "

Meter" .

OK or NG

OK >> GO TO 2. NG >> Combination meter is malfunctioning. Check combination meter. Refer to DI-4, "

METERS" .

Self-Diagnosis M ode o f Combi nation

COMBINATION

2. CHECK SELF DIAGNOSTIC RESULTS

Check the self-d iagnos tic re sults of A BS actu ator a nd ele ctric un it (co ntrol u nit). Re fer to BRC-18, "

nosis" .

OK or NG

OK >> GO TO procedure 1 of symptom 6. NG >> Check the items indicated with self-diagnosis.

Revision: 2006 July 2006 X-Trail

BRC-35

Self-Diag-

Page 36

WHEEL SENSORS

[ABS]

WHEEL SENSORS PFP:47910 Removal and Installation AFS002MI

COMPONENTS

SFIA2394E

REMOVAL

Be careful of the following.

CAUTION:

When removing the sensor, do not rotate it, if possible, and als o do not forcibly pull the sensor ha rness.

INSTALLATION

Tighten the mounting bolts and nuts to the specified torque. Refer to BRC-36, "COMPONENTS" .

CAUTION:

Be careful of the following when installing sensor.

● When installing, make sure there is no foreign materia l such as iron chi ps on pick-up and mount-

ing hole of sensor. Make sure no foreign material has been caught in the sensor rotor. Remove any foreign material and clean the mount.

● When installing front sensor, be sure to press rubber grommets in until they lock at the three loca-

tions shown in the figure (2 at shock absorbers and 1 at bo dy panel). When installed, harness must not be twisted. White line on harness must be visible from front.

● When installing rear sensor, attach harness at rear suspensi on member securely. Besides, har-

ness must not be twisted when installed.

Revision: 2006 July 2006 X-Trail

BRC-36

Page 37

SENSOR ROTOR

[ABS]

SENSOR ROTOR PFP:47970

Removal and Installation (2WD Models) AFS002PY

REMOVAL Front

Remove front sensor rot or from front drive shaft. Refer to FAX-20, "Disassembly and Assembly (Models with

2WD: RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to remove rear sens or rotor.

● Remove axle hous in g. R efe r to RAX-5, "Removal and Installation" .

● Remove rear sen sor rotor from axle housing. Refer to RAX-7, "Disassembly and Assembly" .

INSTALLATION Front

Install front sensor rotor to fron t dri ve shaft. Refer to FAX -20, "Disassembly and Assembly (Models with 2WD:

RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to install rear sensor rotor.

● Install sensor rotor to axle housing. Refer to RAX-7, "Disassem bl y and Assembly" .

● Install axle housin g. Refe r to RAX-5, "Removal and Installation" .

Removal and Installation (AWD Models) AFS002PZ

REMOVAL Front

Remove front sensor rotor from drive shaft. Refer to FAX-26, "Disassembly and Assembly (Models with AWD:

RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to remove rear sensor rotor. Refer to RAX-22, "Disassembly and Assembly" .

● Remove rear drive shaft. Refer to RAX-21, "Remo va l an d I ns tallation" .

● Remove sensor rotor from rear drive shaft.

BRC

INSTALLATION Front

Install front sensor rotor to front drive shaft. Refer to FAX-26, "Disassembly and Assembly (Models with AWD:

RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to install rear sensor rotor.

● Install rear sensor rotor to rear drive shaft. Refer to RAX-22, "Disassembly and Assembly" .

● Install rear drive shaft. Refer to RAX-21, "Removal and Installation" .

Revision: 2006 July 2006 X-Trail

BRC-37

Page 38

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)

[ABS]

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) PFP:47660 Removal and Installation AFS002ML

COMPONENTS

SFIA2397E

1. From master cylinder secondar y side

4. To rear RH caliper 5. To front LH caliper 6. ABS actuator and electric unit

7. From master cylinder primary side 8. Brac ket 9. Shaft

2. To front RH caliper 3. To rear LH caliper

(control unit)

CAUTION:

● If the part number on the part number label (pasted on actuator u pper surface) is the sam e, ABS

actuator and electric unit (control unit) cannot be used on another vehicle. If it is used on another vehicle, ABS warning lamp may turn on or ABS may not operate normally. When replacing ABS actuator and electric unit (control unit), must use new service parts.

● Before servicing, disconnect battery terminals.

● To remove brake tube, u se a flare nut torque wrench to preven t flare nuts and brake tube from

being damaged. To install, use a flare nut torque wrench (commercial service tool ) and tighten to the specified torque.

● Do not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it.

● Do not remove and install ABS actuator and electric unit (control unit) by holding harness.

Revision: 2006 July 2006 X-Trail

BRC-38

Page 39

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)

[ABS]

REMOVAL

1. Disconnect ABS actuator and electric unit (control unit) connector.

2. Loosen brake tube flare nuts, then remove brake tubes fr om ABS actuator and electric unit (control unit).

3. Remove ABS actuator and electric unit (control unit) mounting bolts.

4. Remove ABS actuator and electric unit (control unit) from vehicle.

INSTALLATION

Install in the reverse order of removal.

CAUTION:

Be careful of the following when installing ABS actuator and electric unit (control unit).

● Tighten the mounting bolts and nuts to the specified torque.

● After the work, bleed air from brake piping. Refer to BR-10, "Bleeding Brake System" .

● After installing body harness connec tor in the ABS actuator and electric unit (control unit), make

sure connector is securely locked.

BRC

Revision: 2006 July 2006 X-Trail

BRC-39

Page 40

G SENSOR

[ABS]

G SENSOR PFP:47930 Removal and Installation (Only AWD Models) AFS002MJ

CAUTION:

● Do not drop or strike the G sensor, because it is sensitive to impact.

● Do not use po wer tool, etc. Because G sensor is weak for the impact.

REMOVAL

1. Remove center console. Refer to IP-14, "Center Console" .

2. Disconnect harness connector.

3. Remove mounting nuts and remove G sensor.

NOTE:

There is not need to detach the G sensor main body from a bracket.

SFIA2400E

INSTALLATION

Install in the reverse order of removal observing the precautions above.

Revision: 2006 July 2006 X-Trail

BRC-40

Page 41

PRECAUTIONS

[VDC/TCS/ABS]

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

AFS002QJ

The Supplemental Rest raint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used al ong with a front seat belt, helps to redu ce th e risk or se verit y of i njury to the driv er and front passenge r for ce rtain types of col lision. Information necessary to service the system safely is includ ed in the SRS a nd SB section of this Service Manual.

WARNING:

● To avoid rendering the SRS inoperative, which could inc rease the risk of pe rsonal injury or death

in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.

● Improper maintenanc e, including incorrect removal and installation of the SRS, can lead to per-

sonal injury ca use d by unintentional ac tiv atio n o f the system. For remo va l of Spiral Cable and Air Bag Module, see the SRS sec tion.

● Do not use ele ctrical test equipmen t on any c ircuit rela ted to the SRS unless instructed to in th is

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Precautions for Brake System AFS002Q0

● Recommended fluid is brake fluid “DOT 3”. Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRI-

CANTS"

● Do not reuse drained brake fluid.

● Be careful not to splash brake flu id on painted are as. If brake flu id is splashed , wipe it off and flus h area

with water immediately.

● Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

● Use flare nut torque wrench wh en removing and i ns tal li ng bra ke

tube.

● Brake syst em is an i mportant safety part. If a brak e fluid le ak is

detected, always disassemble the affected part. If a malfunction is detected, replace part with a new one.

● Before working, turn ignition switch OFF and disconnect con-

nectors of VDC/TCS/ABS control unit or battery cable.

● When install ing brake piping, be sure to check torque.

WARNING:

Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.

SBR686C

BRC

Precautions for Brake Control AFS002NX

● Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may

be heard from engine room. This is a normal status of operation check.

● When an error is indic ated by ABS or another warning lam p, collect all necessary information from cus-

tomer (what symptoms are present under what conditions) and check for simple causes before starting diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level, and oil leaks.

● If tire size an d type are use d in an imprope r combinati on, or brake pads are not Genu ine NISSAN parts,

stopping distance or steering stability may deteriorate.

● If there is a ra dio, antenna , or antenna l ead-in wire (inclu ding wiring) ne ar control mo dule, ABS func tion

may have a malfuncti on or error.

● If aftermark et parts (car ste reo, C D pla yer, etc.) have been install ed, c heck fo r inc idents s uch as harn ess

pinches, open circuits, and improper wiring.

● If non-standard suspen sion parts (shock absorber, strut, spring, bush ing, etc.) and reinforcements (roll

bar, tower bar, etc.) are attached, or if suspension parts dete riorate significantly, VDC may not operate normally, VDC OFF indicator lamp and SLIP indicator lamp may turn on.

● If non-stand ard en gi ne comp on en t s ( m uf f l er, e tc.) are at t a che d, V DC may no t op era t e nor m al ly, V DC OF F

indicator lamp and SLIP indicator lamp may turn on.

Revision: 2006 July 2006 X-Trail

BRC-41

Page 42

PREPARATION

[VDC/TCS/ABS]

PREPARATION PFP:00002 Commercial Service Tools AFS002PA

Tool name Description

1.Flare nut crowfoot a: 10 mm (0.39 in) / 12 mm (0.47 in)

2.Torque wrench

S-NT360

Removing and installing each brake piping

Revision: 2006 July 2006 X-Trail

BRC-42

Page 43

ON-VEHICLE SERVICE

[VDC/TCS/ABS]

ON-VEHICLE SERVICE PFP:00000

Adjustment of Steering Angle Sensor Neutral Position AFS002NZ

In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sensor before running vehicle.

Situation Adjustment of Steering Angle Sensor Neutral Position Removing/Installing VDC/TCS/ABS control unit − Replacing VDC/TCS/ABS control unit − Removing/Installing steering angle sensor × Removing/Installing steering components × Removing/Installing suspension components × Change tires to new ones – Tire rotation – Adjusting wheel alignment ×

×: Require d –: Not required

CAUTION:

To adjust neutral position of steering angle se nso r, make sure to use CONSULT-II. (Adjustment cannot be done without CONSULT-II.)

1. Stop vehicle with front wheels in straight-ahead position.

2. Connect CONSULT-II and CONSULT-II converter to data link connector on vehicle.

3. Turn ignition switch ON (do not start engine) and touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENOR ADJUSTMENT” on CONSULT-II screen in this order.

4. Touch “START”.

CAUTION:

Do not touch steering wheel while adjusting ste ering angle sensor.

5. After approximately 10 seconds, touch “END”. (After approximately 60 seconds, it ends auto matically.)

6. Turn ignition switch OFF, then turn it ON again.

CAUTION:

Be sure to perform above operation.

7. Run vehicle with front wheels in straight-ahead position, then stop.

8. Select “DATA MONITOR”, “ECU INPUT SIGNALS”, and “STR ANGLE SIG” on CONSULT-II screen. Then make sure that “STR ANGLE SIG” is within 0 ±3.5°. If value is more than spe cif icatio n, r epeat step s 3 to 7.

9. Erase memory of VDC/TCS/ABS cont rol unit and ECM. Refer to BRC-61, "

ERASE MEMORY" , EC-83,

"TROUBLE DIAGNOSIS" .

10. Turn igniti on switch OFF.

SFIA1659E

BRC

Revision: 2006 July 2006 X-Trail

BRC-43

Page 44

SYSTEM DESCRIPTION

[VDC/TCS/ABS]

SYSTEM DESCRIPTION PFP:00000 System Diagram AFS002O0

SFIA2442E

Functions AFS002O1

ABS

● The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves

handling stabili ty during su dden brak ing by elec trically prev enting 4 whe els lock. M aneuverabil ity is also improved for avoiding obstacles.

● Electrical System Diagnosis by CONSULT-II is av ailable.

EBD

● Electronic Brake Distributor is a function that detects subtle slippages between the front and rear tire dur-

ing braking, and it imp roves hand ling s tability by el ectron ical ly co ntroll ing th e Brake Fluid Press ure whic h results in reduced rear tire slippage.

● Electrical System Diagnosis by CONSULT-II is av ailable.

ABLS (ACTIVE BRAKE LSD)

● Active brake LSD system is detects rotation differentials (the low µ side: high rpm, high µ side: low rpm)

which are generated to the right and left wheels when starting. And the system also controls braking (brake hydraulic pressure) by electronic control. And then it facilitates the starts by increasing a driving force of the wheel on the high µ side after restraining the increase of sli ps of the wheel on the low µ side.

NOTE:

µ: Coefficient of friction

CAUTION:

ABLS also operates when VDC/TCS function is cancelled after pressing VDC OFF switch.

TCS

● VDC/TCS/ABS control uni t detects a spin at drive wheels by comparing wh eel speed signals from all 4

wheels. At this time, output from control unit controls brake fluid pressure to wheels while cutting fuel to engine and closing throttle valve to reduce engine torque. Furthermore, throttle position is continuously controlled to insure appropriate engine torque at all times.

Revision: 2006 July 2006 X-Trail

BRC-44

Page 45

SYSTEM DESCRIPTION

[VDC/TCS/ABS]

● During TCS operation, it inform s driver of system operation by flashing SLIP indicator lam p.

● Electrical System Diagnosis by CONSULT-II is available.

VDC

● In addition to TCS/ ABS function, VDC detects driv er's steering operatio n amount and brak e pedal travel

from steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel sensor, VDC judges dr iv ing c on di tio n (c on di tio ns o f un de r s tee r a nd ov er s te er) to i mp r ov e stabi lit y by controlli ng brake application to 4 wheels and engine output.

● During VDC operation, SLIP indicator lamp flashes to inform driver of VDC operation.

● Electrical System Diagnosis by CONSULT-II is available.

Operation That Is Not “System Err or” AFS002O2

ABS

● When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating noise

may be heard from engine room. Thi s is a normal sta tes of the operation check.

● During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

● Stopping distance may be longe r than that of vehi cles with out ABS wh en ve hicle dri ves on roug h, gra vel,

or snow-covered (fresh, deep snow) roads.

TCS

● During TCS oper ation , body and br ake peda l li ghtly vibrat e and me cha nica l noise s may be hea rd. This is

normal.

● Depending on road circumstances, driver ma y have a sluggish feel. This is normal, because optimum

traction has highest priority under TCS operation.

● When vehicle is pass ing thro ug h a roa d w h ere surf ac e fric ti on coe fficie nt v arie s, dow n s hif tin g or de press-

ing accelerator pedal fully may activate TCS temporarily.

VDC

● During VDC o pe ration, body and brake pedal lightl y vibrate and me ch an ic al noises may be h ea r d. Thi s is

normal.

● If vehicle is rotated on tu rn table, or rolled and rocked on ship, ABS warning la mp, VDC OFF indicator

lamp and SLIP indicator lamp may turn on. In this case, start engine on normal road again. If ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off after restart, it is normal.

● When startin g T CS or V DC un de r r a pi d ac ce le r ati on o r h ar d tur n , o pe r atin g n oi se by br a ke p edal i s ge ne r-

ated. However, this is not abnormal. This is because TCS and VDC are functioning normally.

● When driving in steep slope such as bank, ABS warning lamp, VDC OFF indicator lamp, and SLIP indica-

tor lamp may turn on. In this case, start engine on normal road again. If ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off after restart, it is normal.

● A malfunction o rie nted Yaw rate / side G sensor may oc cur un der ha rd turn l ike sp in turn , rapid acce lera-

tion turn, drift run, etc when VDC fun ction is OFF (VDC O FF SW ON ). It is not abno rm al if it is pos si ble to return to a normal positi on after restarting engine. Then erase the memory of Self-Dia gnosis. Refer to

BRC-61, "

ERASE MEMORY" . .

BRC

Revision: 2006 July 2006 X-Trail

BRC-45

Page 46

SYSTEM DESCRIPTION

[VDC/TCS/ABS]

Hydraulic Circuit Diagram AFS002O4

SFIA2443E

CAN Communication AFS0035M

SYSTEM DESCRIPTION

CAN (Controller Area N et w ork ) is a s eri al co mm u nic a tio n l ine for real time appl ic ati on . It is an on-vehicle m ul tiplex communi catio n lin e wit h high da t a comm unic ation speed and ex cellen t er ror det ecti on ab ilit y. Many electronic control u nits are eq uipped o nto a ve hicle, a nd eac h control unit sh ares info rmation and link s with ot her control units duri ng operation (not independent). In CAN communicatio n, control units ar e connected wi th 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-2 1, "

CAN Communication Unit" .

Revision: 2006 July 2006 X-Trail

BRC-46

Page 47

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS PFP:00004

Fail-Safe Function AFS0038I

ABS, EBD, ABLS

In case of electrical m alfunction with the ABS, ABS warni ng lamp, VDC OFF indicator lamp, SLIP indicator lamp will turn on. In case of electrical incidents with EBD, ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will turn on. Simultaneously, the VDC/ TCS/ABS become one of the following conditi on s of the Fail -Safe function.

1. For ABS malfun ction, onl y the EBD is a ctivated and the co ndition of the vehicle is the sam e condition of vehicles without VDC/TCS/ABS equipment.

NOTE:

In condition 1 de scribed above, an ABS se lf diagnosis sound may be heard. That is a norm al condition because a self di agnosis for “I gnition switch ON” and “The first starting” are being performed.

2. For EBD malfunction, the EBD, ABLS and ABS become inoperative, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS/ABS, EBD equipment.

3. For ABLS malfunction, only the ABLS become inoperative, and the condition of the vehicle is the same condition of vehicles without ABLS equipment.

VDC/TCS

In case of VDC/TCS system malfunction, the VDC OFF indicator lamp and SLIP indicator lamp or only VDC OFF indicator lamp are turned on, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS equipm ent. In case of electrical malfunction with the VDC/TCS system, the ABS control continues to operate norma ll y with ou t VDC/ TC S control.

CAUTION:

If the Fail-Safe function is activated, then perform the self diagnosis for VDC/TCS/ABS control system.

BRC

How to Perform Trouble Diagnosis Fo r Quick and Accurate Repair AFS002O6

INTRODUCTION

● Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle

thoroughly.

● It is also important to c larify cust omer c ompl aints be fore in spec -

tion. First of all, reproduce symp tom, and understand it fully. Ask customer about his/her complaints carefully. In some cases, it will be necessary to check symptom by driving vehicle with customer.

NOTE:

Customers are not professionals. Do not assum e “maybe customer means...” or “maybe cus tomer mentioned this symptom”.

SEF234G

● It is essentia l to che ck sy mp to ms ri gh t fro m be gi nn in g in o r der t o

repair a malfunction completely. For an intermittent malfunction, it is important to reproduce symptom based on interview with customer and past examples. Do not perform inspection on ad hoc basis. Most intermittent malfunctions are caused by poor contacts. In this case, it will be effective to shake suspected harness or connector by hand. When repairs are performed without any symptom check, no one can judge if malfunc t i on has ac tu all y be en eliminated.

● After diagnosi s, make s ure to p erform “eras e memo ry”. Refer to

BRC-61, "

● For an intermitte nt malfunction, move harness or ha rness con-

nector by hand t o check poor contact or fals e open circuit.

● Always read “GI section” to confirm general precautions. Refer to GI-4, "General Precautions" .

ERASE MEMORY" .

SEF233G

Revision: 2006 July 2006 X-Trail

BRC-47

Page 48

DIAGNOSIS FLOW CHART

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

PFIA0700E

Revision: 2006 July 2006 X-Trail

BRC-48

Page 49

TROUBLE DIAGNOSIS

ASKING COMPLAINTS

● Complaints against malfunction vary depending on each person.

It is important to clarify customer complaints.

● Ask customer about what symptoms are present and under

what conditions. Use information to reproduce symptom while driving.

● It is also important to use diagnosis sheet so as not to miss infor-

mation.

[VDC/TCS/ABS]

EXAMPLE OF DIAGNOSIS SHEET

SBR339B

BRC

SFIA0791E

Revision: 2006 July 2006 X-Trail

BRC-49

Page 50

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Component Parts Location AFS002O7

SFIA2402E

Revision: 2006 July 2006 X-Trail

BRC-50

Page 51

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Schematic AFS002O8

BRC

TFWB0114E

Revision: 2006 July 2006 X-Trail

BRC-51

Page 52

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Wiring Diagram — VDC — AFS002O9

TFWB0115E

Revision: 2006 July 2006 X-Trail

BRC-52

Page 53

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

BRC

TFWB0014E

Revision: 2006 July 2006 X-Trail

BRC-53

Page 54

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

TFWB0015E

Revision: 2006 July 2006 X-Trail

BRC-54

Page 55

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

BRC

TFWB0016E

Revision: 2006 July 2006 X-Trail

BRC-55

Page 56

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

TFWB0116E

Revision: 2006 July 2006 X-Trail

BRC-56

Page 57

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

BRC

TFWB0018E

Revision: 2006 July 2006 X-Trail

BRC-57

Page 58

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Control Unit Input/Output Si gn al Standard AFS002OA

REFERENCE VALUE FROM CONSULT-II

CAUTION:

The displayed item is the da ta calculated by the contro l unit, so it may indica te a norma l value even if an output circuit (harness) is open or shorted.

Data monitor

Data monitor item Display item

FR LH SENSOR FR RH SENSOR RR LH SENSOR RR RH SENSOR

FR LH IN SOL FR LH OUT SOL FR RH IN SOL FR RH OUT SOL RR LH IN SOL RR LH OUT SOL RR RH IN SOL RR RH OUT SOL

STOP LAMP SW

MOTOR RELA Y

ACTUATOR RELAY

PARK BRAKE SW Parking brake status

ABS WARN LAMP

OFF LAMP

OFF SW

Wheel speed calculated using signals from all four wheel sensors

Operation status of all solenoid valve

Brake pedal operation status

Motor and motor relay operation status

Actuator relay operation status

ABS warning lamp status (Note 2)

VDC OFF indicator lamp status (Note 3)

VDC OFF SW ON/OFF condition

Condition Vehicle stopped 0 [km/h]

Vehicle running (Note 1)

Actuator (solenoid valve) is active (“Active T est ”with CONSUL T -II) or actuator relay is inactive (in fail-safe mode).

When the act uator (solenoid valve) is not active and actuator relay is active (ignition switch ON).

Brake pedal depressed ON Brake pedal not

depressed When the motor relay

and motor are operating

When the motor relay and motor are not operating

When the act uator relay is operating

When the act uator relay is not operating

Parking brake activated ON Parking brake not ac ti-

vated When ABS warning

lamp is ON. When ABS warning

lamp is OFF. When VDC OFF indi-

cator lamp is ON. When VDC OFF indi-

cator lamp is OFF. VDC OFF switch ON

(When VDC O FF indi cator lamp is ON.)

VDC OFF switch OFF (When VDC OFF indicator lamp is OFF.)

Reference values in nor-

mal operation

Nearly matches the speedometer display (± 10% or less)

OFF

Reference: Inspect item

BRC-71, " sor"

BRC-77, " VDC Switching Valve"

BRC-81, " Switch Circuit"

BRC-79, " Motor and Motor Relay"

BRC-80, " Relay"

BRC-86, " BRAKE SWITCH"

BRC-69, " ING LAMP, BRAKE WARNING LAMP, VDC OFF INDICA TOR LAMP, AND SLIP INDICATOR LAMP"

BRC-85, " SWITCH"

Wheel Sen-

Solenoid and

Stop Lamp

Actuator

PARKING

ABS WARN-

VDC OFF

Revision: 2006 July 2006 X-Trail

BRC-58

Page 59

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Data monitor item Display item

SLIP LAMP

BATTERY VOLT

GEAR (Only A/T models)

SLCT LVR POSI (Only A/T models)

YAW RATE SEN

ACCEL POS SIG

SIDE G SENSOR

STR ANGLE SIG

ENG RPM

PRESS SENSOR

EBD FAIL SIG ABS FAIL SIG TCS FAIL SIG VDC FAIL SIG

ASCD SIGNAL

FLUID LEV SW

SLIP indicator lamp status (Note 4)

Battery voltage supplied to the VDC/TCS/ ABS control unit

A/T gear position

A/T shift position

Yaw rate detected by yaw rate sensor

Open/close condition of throttle valve (linked with accelerator pedal)

Transverse acceleration detected by side G sensor

Steering wheel angle detected by steering angle sensor

With the engine running

Brake fluid pressure detected by pressure sensor

System fail signal status

ASCD operation condition

Brake fluid level switch status.

Data monitor

Condition

When SLIP indicator lamp is ON

When SLIP indicator lamp is OFF.

Ignition switch ON 10 – 16 V

1st gear 2nd gear 3rd gear 4th gear 5th gear

P position R position N position D position

Vehicle stopped Approx. 0 d/s During driving – 70 to 70 d/s Accelerator pedal not

depressed (ignition switch is ON)

Accelerator pedal depressed (ignition switch is ON)

Vehicle stopped During driving

Straight-ahead condition

Steering – 720 to 720° With the engine

stopped

Engine ru nning With the ignition switch

turned ON and brake

pedal released. With the ignition switch

turned ON and brake

pedal depressed.

Malfunctions condition (When system failed)

ASCD activated ON ASCD not activated OFF When brake fluid level

switch is ON. When brake fluid level

switch is OFF.

Reference values in nor-

mal operation

OFF

1 2 3 4 5

P R N D

0 – 100%

Approx. 0 m/s – 24.3 to 24.1 m/s

Approx. 0 °

0 rpm

Almost in accordance with tachometer display

Approx. 0 bar

– 40 to 300 bar

OFF

Reference: Inspect item

BRC-91, " Lamp Indication Is Not Normal"

BRC-82, " ABS Control Unit Power And Ground"

Slip Indicator

VDC/TCS/

—

BRC-83, " Position (PNP) Switch (Only A/T Models)"

BRC-76, " Side G Sensor"

Control unit communication circuit between the VDC/TCS/ABS control unit and ECM

Park/Neutral

BRC

Yaw Rate/

BRC-76, "Yaw Rate/ Side G Sensor"

BRC-74, " Angle Sensor"

Steering

Engine speed signal circuit

BRC-73, " sor"

EBD system ABS system TCS system VDC system

ASCD and circuit

BRC-84, " Level Switch"

Pressure Sen-

Brake Fluid

Revision: 2006 July 2006 X-Trail

BRC-59

Page 60

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Data monitor

Data monitor item Display item

USV [FR-PL] USV [FL-RR] HSV [FR-RL] HSV [FL-RR]

V/R OUTPUT

M/R OUTPUT

Note 1: Confirm tire pressure is the standard value. Note 2: ON/OFF timing of the ABS warning lamp ON: When the ignition switch is turned ON, or when a m al fu nctio n is detected. OFF: After the ignition switch is turned ON (when the syst em is in nor ma l operat ion) . Note 3: ON/OFF timing of the VDC OFF indicator lamp ON: When the ignition switch is turned ON, or when a mal fu nct ion is detec ted VDC OFF switch is ON . OFF: After the ignition switch is turned ON (when the system is in norma l ope ration) or when VD C OFF switch is OFF. Note 4: ON/OFF timing of the SLIP indicator lamp ON: When the ignition switch is turned ON, or when a m al fu nctio n is detected. OFF: After the ignition switch is turned ON (when the system is in nor ma l operati on) and VD C/TCS f unct ion is not activat ed. Flashing: VDC/TCS function is active during driving .

VDC switch-over solenoid valve status

Actuator relay activated (ON/OFF)

Actuator motor and motor relay status (ON/OFF)

Condition

When the act uator (switch-over solenoid valve) is active.

When the act uator (switch-over solenoid valve) is inactive.

When the act uator relay is active.

When the act uator relay is not active (before the engine get started and in the failsafe mode).

When the act uator motor and motor relay are active.

When the act uator motor and motor relay are inactive.

Reference values in nor-

mal operation

OFF

Reference: Inspect item

BRC-77, " VDC Switching Valve"

BRC-80, " Relay"

BRC-79, " Motor and Motor Relay"

Solenoid and

Actuator

CONSULT-II Functions (ABS) AFS002OB

CONSULT-II MAIN FUNCTION

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

Diagnostic

test mode

WORK SUPPORT

SELF-DIAGNOSTIC RESULTS

DATA MONITOR

CAN DIAG SUPPORT MNTR

ACTIVE TEST

FUNCTION TEST

ECU PART NUMBER

This mode enables a technician to adjust some devices faster and more accurately by following the indications on CONSULT-II.

Self-diagnostic results can be read and erased quickl y. BRC-61, "

Input/Output data in the VDC/TCS/ABS control unit can be read. BRC-64, "

The results of transmit / receive diagnostic of CAN comm uni cation can be read.

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the VDC/TCS/ABS control unit and also shifts some parameters in a specified range.

This mode is used to inform customers when their ve hic le condi t io n requ ires per i odic maintenance.

VDC/TCS/ABS control unit part number can be read. —

Function Reference

BRC-43, " Steering Angle Sensor N eutral Position"

“CONSULT-II OPERATION

Adjustment of

Self-Diagnosis"

Data Monitor"

LAN-13, "

MANUAL (FUNCTION

CAN Diagnostic

Support Monitor".

BRC-66, "

Active Test"

Separate volume

TEST)”

Revision: 2006 July 2006 X-Trail

BRC-60

Page 61

TROUBLE DIAGNOSIS

CONSULT-II BASIC OPERATION PROCEDURE

1. Touch ”ABS” in the “SELECT SYSTEM” screen.

[VDC/TCS/ABS]

BCIA0030E

2. Select the requi red diag nostic l ocation fro m the “SELECT DIAG MODE” screen.

BCIA0031E

SELF-DIAGNOSIS OPERATION PROCEDURE

1. Turn ignition switch OFF.

2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.

3. Turn ignition switch ON.

4. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.

5. After stopping vehicle, with th e engine running, touch “START (NISSAN BASED VHCL)”, “ABS”, “SELFDIAG RESULTS” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

6. The self-dia gn os ti c resu lt s ar e d is pla yed . ( Touch “PRINT” to pr in t out se lf -d ia gn os tic r e sul t s, i f nece ss ar y.)

● Check ABS warning lam p, VDC OFF indicator lamp and SLIP indic ator lamp If “NO FAILURE” is dis-

played.

7. Perform the appropriate inspection from the display item list, and repair or replace the malfunction ing component. Refer to BRC-62, "

DISPLAY ITEM LIST" .

8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.

CAUTION:

CONSULT-II Data Link Connector (DLC) Circuit" .

BRC

ERASE MEMORY

1. Turn ignition switch OFF.

2. Start engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE MEMORY” in order on the CONSULT-II screen to erase the error memory. If “ABS” is not indicated, go to GI-37, "

CAUTION:

If the error memory is not erased, re-perform the operation from step 4.

3. Perform sel f-diagnosis again, and make sure that diagnostic memory is erased.

4. Drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off.

CAUTION:

VDC OFF switch should not stay in the “ON” position.

Revision: 2006 July 2006 X-Trail

CONSULT-II Data Link Connector (DLC) Circuit" .

BRC-61

Page 62

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

DISPLAY ITEM LIST

Code Diagnostic item Malfunction is detected when... Check circuit

C1101 RR RH SENSOR – 1 Circuit of rear RH wheel sensor is open. C1102 RR LH SENSOR – 1 Circuit of rear LH wheel sensor is open. C1103 FR RH SENSOR – 1 Circuit of front RH wheel sensor is open. C1104 FR LH SENSOR – 1 Circuit of front LH wheel sensor is open.

When the circuit in the rear RH wheel sensor is short- circ ui ted . Or when the sensor power voltage is outside the standard. When

C1105 RR RH SENSOR – 2

C11 0 6 RR LH SENSOR – 2

C1107 FR RH SENSOR – 2

C1108 FR LH SENSOR – 2

C1109

C1110 CONTROLLER FAILURE When there is an internal error in the VDC/TCS/ABS control unit.

C1111

C1114 MAIN RELAY

C1115

C1116 STOP LAMP SW Stop lamp switch circuit is open.

BATTERY VOLTAGE [ABNORMAL]

PUMP MOTOR ACTUATOR RLY (Note 2)

ABS SENSOR [ABNORMAL SIGNAL]

the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he cont r ol unit.

When the circuit in the rear LH wheel sensor is short-c ircui t ed. Or when the sensor power voltage is outside the standard. When the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he cont r ol unit.

When the circuit in the front LH wheel sensor is short-ci rc ui te d. Or when the sensor power voltage is outside the standard. When the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recogniz ed by t he cont r ol unit.

When the VDC/TCS/ABS control unit power voltage is lower than normal.

During the actuator motor operating with ON, when the actuator motor turns OFF, or when the control line for act uator motor rela y is open.

During the actuator motor operating with OFF, when the actuator motor turns ON, or when the control line for relay is shorted to ground.

During the actuator relay operating with OF F, when the actuator relay turns ON. Or when the control line for the relay is shorted to the ground.

During the actuator relay operating with ON, w hen th e act uat or relay turns OFF, or when the control line for the relay is open.

Wheel sensor input signal is irregular.

BRC-71, " Sensor" (Note 1)

BRC-82, " TCS/ABS Control Unit Power And Ground"

BRC-73, " TCS/ABS Control Unit"

BRC-79, " Motor and Motor Relay"

BRC-80, " Relay"

BRC-71, " Sensor"

BRC-81, " Lamp Switch Circuit"

Wheel

VDC/

Actuator

Wheel

Stop

Revision: 2006 July 2006 X-Trail

BRC-62

Page 63

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Code Diagnostic item Mal funct i on is dete cte d when. .. Check circ uit

C1120 FR LH IN ABS SOL

C1121 FR LH OUT ABS SOL

C1122 FR RH IN ABS SOL

C1123 FR RH OUT ABS SOL

C1124 RR LH IN ABS SOL

C1125 RR LH OUT ABS SOL

C1126 RR RH IN ABS SOL

C1127 RR RH OUT ABS SOL

C1130 ENGINE SIGNAL 1 C1131 ENGINE SIGNAL 2 C1132 ENGINE SIGNAL 3 C1133 ENGINE SIGNAL 4 C1136 ENGINE SIGNAL 6

C11 42 PRESS SEN CIRCUIT

C1143 ST ANGLE SEN CIRCUIT

C1144 ST ANGLE SEN SIGNAL

C1145 YAW RATE SENSOR

C1146 SIDE G-SEN CIRCUIT

C1147 USV LINE [FL-RR]

C1148 USV LINE [FR-RL]

C1149 HSV LINE [FL-RR]

C1150 HSV LINE [FR-RL]

C1153 EMERGENCY BRAKE

C1154

PNP POS SIG (Only A/T model)

When the control unit detects a malfunction in the front left inlet solenoid circuit.

When the control unit detects a malfunction in the front left outlet solenoid circuit.

When the control unit detects a malfunction in the front right inlet solenoid circuit.

When the control unit detects a malfunction in the front right out let solenoid circuit.

When the control unit detects a malfunction in the rear left inlet solenoid circuit.

When the control unit detects a malfunction in the rear left outlet solenoid circuit.

When the control unit detects a malfunction in the rear right inlet solenoid circuit.

When the control unit detects a malfunction in the rear right outlet solenoid circuit.

Major engine components are malfunctionin g

Pressure sensor signal line is open or shorted, or pressure sensor is malfunctioning.

Neutral position of steering angle sensor is dislocat ed, or the steering angle sensor is malfunctioning.

Neutral position correction of steering angle sensor is not finished.

Y aw rate sensor is malfunctioning, or the yaw rate sensor signal line is open or shorted.

Side G sensor is malfunctioning, or circuit of side G sensor is open or shorted.

VDC switch-over solenoid valve 1 on the primary si de i s open circuit or shorted, or the control line is open or shorted to the power supply or the ground.

VDC switch-over solenoid valve 1 on the secondary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.

VDC switch-over solenoid valve 2 on the primary si de i s open circuit or shorted, or the control line is open or shorted to the power supply or the ground.

VDC switch-over solenoid valve 2 on the secondary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.

VDC/TCS/ABS control unit malfunction (pressure increa se is too much or too little.)

P position switch stuck to ON or TCM internal mal fun ct io n, VDC/ TCS/ABS control unit internal malfunction.

BRC-77, " and VDC Switching Valve"

BRC-73, " System"

BRC-73, " sure Sensor"

BRC-74, " Angle Sensor"

BRC-43, " ment of Steering Angle Sensor Neutral Position"

BRC-76, " Rate/Side G Sensor"

BRC-77, " and VDC Switching Valve".

BRC-73, " TCS/ABS Control Unit"

BRC-83, " Neutral Position (PNP) Switch (Only A/T Models)"

Solenoid

Engine

Pres-

Steering

Adjust-

Yaw

Solenoid

VDC/

Park/

BRC

Revision: 2006 July 2006 X-Trail

BRC-63

Page 64

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Code Diagnostic item Malfunction is detected when... Check circuit

Brake fluid level drops or communication line between the VDC/

C1155 BR FLUID LEVEL LOW

C1156 ST ANG SEN COM CIR

U1000 CAN COMM CIRCUIT

Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure that ABS warning lamp turns off w hile driving vehi cle at 30 km/h (19 MPH) or m ore for approximat ely 1 minute according to se lf-diagnosis procedure. In addition, if wheel sensor 2 is displ ay ed fo r wheel s, check wheel sensor circuit and also check control unit power voltage. Note 2: ACTUATOR RLY” on the CONSU LT-II self-diagnostic results indicates the malfunction of the actuator motor relay and circuit. Note 3: When e rrors ar e detected in seve ral syst ems, in cluding CAN com municat ion c ircuit [ U1000 ], troubl eshoot CA N co mmun ication circuit. Refer to BRC-85, "

CAN Communication" .

TCS/ABS control unit and brake fluid level warning switch is open or shorted.

CAN communication circuit or stee ring angle sensor is malfunctioning.

● CAN communication circuit is open or shorted.

● VDC/TCS/ABS control unit internal malfunction.

● Battery voltage for ECM is interrupted instantaneously for

Approx. 0.5 seconds or more.

BRC-84, " Fluid Level Switch"

BRC-85, " Communication"

BRC-85, " Communication"(Note 3)

DATA MONITOR OPERATION PROCEDURE

1. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

2. At the mo ni tor i tem s el e ctio n s cr e en , to uc h o ne of t h e i tems “ EC U I NPU T S IGN ALS ”, “ MAI N S IGN ALS ” or “SELECTION FROM MENU”.

3. Touch “START” to proceed to the data monitor screen.

CONSULT-II Data Link Connector (DLC) Circuit" .

Brake

CAN

DISPLAY ITEM LIST

Data monitor item (Unit)

FR LH SENSOR [km/h]

FR RH SENSOR [km/h]

RR LH SENSOR [km/h]

RR RH SENSOR [km/h]

FR RH IN SOL (ON/OFF)

FR RH OUT SOL (ON/OFF)

FR LH IN SOL (ON/OFF)

FR LH OUT SOL (ON/OFF)

RR RH IN SOL (ON/OFF)

RR RH OUT SOL (ON/OFF)

RR LH IN SOL (ON/OFF)

RR LH OUT SOL (ON/OFF)

SELECT MONITOR ITEM

ECU INPUT SIG-

NALS

×××

– ××

MAIN

SIGNALS

SELECTION

FROM MENU

×: Standard –: Not applicable

Remarks

Wheel speed calculated by front LH wheel sensor signal is displayed.

Wheel speed calculated by front RH wheel sensor signal is displayed.

Wheel speed calculated by rear LH wheel sensor signal is displayed.

Wheel speed calculated by rear RH wheel sensor signal is displayed.

Front RH wheel inlet solenoid valve (ON/OFF) status is displayed.

Front RH wheel outlet solenoid valve (ON/OFF) status is displayed.

Front LH wheel inlet solenoid valve (ON/OFF) status is displayed.

Front LH wheel outlet solenoid valve (ON/OFF) status is displayed.

Rear RH wheel inlet solenoid valve (ON/OFF) status is displayed.

Rear RH wheel outlet solenoid valve (ON/OFF) status is displayed.

Rear LH wheel inlet solenoid valve (ON/OFF) status is displayed.

Rear LH wheel outlet solenoid valve (ON/OFF) status is displayed.

Revision: 2006 July 2006 X-Trail

BRC-64

Page 65

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

SELECT MONITOR ITEM

Data monitor item (Unit)

STOP LAMP SW (ON/OFF)

MOTOR RELA Y (ON/OFF )

ACTUATOR RLY (ON/OFF )

ABS WARN LAMP (ON/OFF)

OFF LAMP (ON/OFF)

OFF SW (ON/OFF)

SLIP LAMP (ON/OFF)

BATTERY VOLT (V )

GEAR (Only A/T models) ×××

YAW RATE SEN (d/s)

SLCT LVR POSI (Only A/T models) ×××

ACCEL POS SIG (%)

SIDE G-SENSOR

)

(m/s STR ANGLE SIG

(°) PRESS SENSOR

(bar) ENGINE RPM

(rpm) SNOW MODE SW

(ON/OFF) BST OPER SIG

(ON/OFF) OD OFF SW

(ON/OFF) EBD SIGNAL

(ON/OFF) ABS SIGNAL

(ON/OFF) TCS SIGNAL

(ON/OFF) VDC SIGNAL

(ON/OFF) CAN COM START

(ON/OFF)

ECU INPUT SIG-

NALS

×××

– ××

×××

– ××

×××

××–

× ––

× – ×

––× “OFF” is displayed.

––×

MAIN

SIGNALS

SELECTION

FROM MENU

Stop lamp switch (ON/OFF) status is displayed.

ABS motor relay signal (ON/OFF) status is displayed.

ABS actuator relay signal (ON/OFF) status is displayed.

ABS warning lamp (ON/OFF) status is displayed.

VDC OFF indicator lamp (ON/OFF) status is displayed.

VDC OFF sw itch (ON/OFF) status is displayed.

SLIP indicator lamp (ON/OFF) status is displayed.

The voltage supplied to VDC/TCS/ ABS cont rol uni t is displayed .

The gear position determined from Park/Neutral position (PNP) switch signal is displayed.

Yaw rate detected by the yaw rate sensor is displayed.

Shift position determined from the Park/Neutral position (PNP) switch signal is displayed.

Throttle valve open/close status judged by the CAN communication signal is displayed.

Transverse acceleration detected by the side G sensor is displayed.

Steering wheel angle detected by the steering angle sensor is displayed.

Brake fluid pressure detected by the pressure sensor is displayed.

Engine speed judged by the CAN communication signal is displayed .

EBD operation (ON/OFF) status is displayed.

ABS operation (ON/OFF) status is displayed.

TCS opera t ion (ON/OFF) stat us is displayed.

VDC operation (ON/OFF) status is displayed.

Communication status of CAN communication is displayed.

Remarks

BRC

Revision: 2006 July 2006 X-Trail

BRC-65

Page 66

TROUBLE DIAGNOSIS

SELECT MONITOR ITEM

Data monitor item (Unit)

ASCD SIGNAL (ON/OFF) – – ×

FLUID LEV SW (ON/OFF)

PARK BRAKE SW (ON/OFF)

V/R OUTPUT (ON/OFF)

M/R OUTPUT (ON/OFF)

VDC FAIL SIG (ON/OFF)

TCS FAIL SIG (ON/OFF)

ABS FAIL SIG (ON/OFF)

EBD FAIL SIG (ON/OFF)

ECU INPUT SIG-

NALS

× – ×

––×

MAIN

SIGNALS

SELECTION

FROM MENU

[VDC/TCS/ABS]

Remarks

ON/OFF status of the VDC/TCS operation signal to ASCD is displayed.

Brake fluid level warning switch (ON/ OFF) status is displayed.

Parking brake switch (ON/OFF) status is displayed.

Actuator relay activation signal (ON/ OFF) status is displayed.

Motor relay activation signal (ON/ OFF) status is displayed.

VDC fail-safe signal (ON/OFF) st atus is displayed.

TCS fail-safe signal (ON/OFF) status is displayed.

ABS fail-safe signal (ON/OFF) status is displayed.

EBD fail-safe signal (ON/OFF) status is displayed.

ACTIVE TEST

CAUTION:

● Do not perform ACTIVE TEST while driving vehicle.

● Make sure to completely bleed air from the brake system.

● Active test cannot be performed when EBD, ABS, TCS or VDC operation is malfunction.

● ABS and brake warning lamps turn on during ACTIVE TEST.

OPERATION PROCEDURE

1. Connect CONSULT-II and CONVERTER to data link connector and start engine.

2. Touch “START (NISSAN BASED VHCL)”, “ABS”, “ACTIVE TEST” in order on the CONSULT-II screen. If “ABS” is not indicated, go to GI-37, "

3. The “ SELECT TEST ITEM” screen is displayed.

4. Touch necessary test item.

5. Touch “START” with “MAIN SIGNALS” line inverted.

6. ACTIVE TEST screen will be displayed, so perform the following test.

● Solenoid valve

● ABS motor

NOTE:

● When active tes t is pe r for me d whi l e de pre ssi n g peda l, pe da l dep r ess io n amou nt wil l cha ng e, bu t t hi s

is normal.

● Approximately 10 seconds after operation has begun, “TEST STOP” will be displayed.

● To perform a retest aft er “TEST STOP” is displayed, touch “BACK” and perform test from step 3.

CONSULT-II Data Link Connector (DLC) Circuit" .

SFIA2085E

Revision: 2006 July 2006 X-Trail

BRC-66

Page 67

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

SOLENOID VALVE

NOTE:

The example shown is for front right wheel. The procedure for the other wheels is the same as given below.

● When performin g an active test o f the ABS function , select the mai n item for each tes t item. In addit ion,

when performing an active test of the VDC/TCS function, select the item menu for each test item.

● For ABS solenoid valve, touch “UP”, “KEEP”, “DOWN” on the display screen.

For ABS solenoid valve (ACT), touch “UP”, “ACT UP”, “ACT KEEP” and confirm that solenoid valves (IN, OUT, USV, HSV) operate as shown in the tabl e below.

SFIA0591E

Solenoid Valve Operation Chart

Operation

FR RH IN SOL OFF ON ON OFF OFF OFF FR RH OUT SOL OFF OFF ON* OFF OFF OFF USV [FR - RL] OFF OFF OFF OFF ON ON HSV [FR - RL] OFF OFF OFF OFF ON* OFF

*: ON for 1 to 2 seconds after the touch, and then OFF

UP KEEP DOWN UP ACT UP ACT KEEP

ABS solenoid valve ABS solenoid valve (ACT)

BRC

ABS MOTOR

Touch “ON”, “O FF” on th e display screen a nd m a ke s ure ABS m oto r relay and ABS actuator rela y are operatin g as given in the followi ng table.

Operation ON OFF MOTOR RELA Y ON OFF ACTUATOR RELAY ON ON

SFIA0593E

Revision: 2006 July 2006 X-Trail

BRC-67

Page 68

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

For Fast and Accurate Diagnosis AFS002OC

PRECAUTIONS FOR DIAGNOSIS

● Before performing diagnosis, always read GI section to confirm general precautions.

● If VDC/TCS/ABS control unit, steeri ng angle s ensor, steering system parts, su spension system parts, or

tires have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to BRC-43, "

● When replac ing VDC/TCS/ABS control unit, be sure labels on control units are same color.

● After diagnosis is finished, be sure to erase memory. Refer to BRC-61, "ERASE MEMORY" .

● When checking continuity and voltage between units, be sure to check for disconnection, looseness,

bend, or collapse of conn ector terminals. If any malfunc tion is found, repair or replace c onnector terminals.

● For intermittent symptoms, possible cause is malfunction in harness, harne ss connector, or terminals.

Move harness, harness connect or, and terminals to check for poor co nnections.

● If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.

● To use CONSULT-II to perform self-diagnosis of VDC/TCS/ABS control unit, active tests, or work support,

first stop work, then connect CONSULT-II and CONSULT-II CONVERTER to data link connector and select “ABS”.

● CONSUL T-II self-diagnost ic res ult s are di splayed witho ut regar d to occu rrence timing . In so me cases l ater

ones (timing value is small) appear on the next screen.

● While self-diagn os tic res u lts of CO N SU LT-II shows a malf un ction, if CONSULT-II active test is pe rfo r me d,

an engine syst em error may be indicated. In this ca se, start engine to resume norm al screen.

● VDC/TCS/ABS system electronically controls brake operation and engine output. Following symptoms

may be caused by normal operations:

Adjustment of Steering Angle Sensor Neutral Position" .

Symptom Symptom description Result

This is noise of motor inside VDC actuator. Slight noise may occur dur-

Motor operation noise

System operation check noise

TCS operation (SLIP indicator lamp ON)

ABS operation (Longer stopping distance)

Insufficient feeling of acceleration

ing VDC, TCS, and ABS operation. Just after engine starts, motor operating noise may be heard. This is a

normal status of the system operation check. When the engine starts, slight “click” noise may be heard from eng in e

room. This is normal and is part of system operation check. TCS may activate momentarily if wheel speed changes when driving

over location where friction coefficient varies, when downshifting, or when fully depressing accelerator peda l.

When checking speed meter etc. with a 2-wheel - drive chassis dynamometer, vehicle speed is not increased by pressing down on the accelerator.

When driving on roads with a low coefficient of friction, such as snowy roads or gravel roads, the stopping distance is someti me s lo nger for vehicles equipped with ABS. Therefore, when driving on such roads, drive at a sufficiently reduced speed to be safe.

Depending on road conditions, driver may fee l that feeling of accel er ation is insufficient. This is because traction control, which co ntrol s engine and brakes to achieve optimal traction, has the highest priority (for safety). As a result, there may be times when acceleration is slightly less than usual for the same accelerator peda l ope rati on.

Normal

Normal Normal

Cancel VDC/TCS function for the inspection on a chassis dynamometer.

Normal

ON and OFF Timing for ABS Warning Lamp, VDC OFF Indicator Lamp, SLIP Indicator Lamp and Brake warning lamp .

×: ON –: OFF

Condition ABS warning lamp

Ignition SW OFF – – – – When ignition SW is

turned ON

×××× [Note 2]

VDC OFF indicator

lamp

SLIP indicator lamp

Brake warning lamp

[Note1]

Revision: 2006 July 2006 X-Trail

BRC-68

Page 69

TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

Condition ABS warning lamp

After ignition switch is turned ON. (When system is normal.)

VDC OFF switch turned ON. (VDC function is OFF.)

VDC/TCS/ABS error. ×××– When VDC/TCS is not

functioning normally. EBD error. ×××–

–––× [Note 2]

– × ––

– ××–

VDC OFF indicator

lamp

SLIP indicator lamp

Brake warning lamp

[Note1]

NOTE:

1. Brake warnin g lamp will turn on in case of operating parkin g brake (switch turned ON) or of actuating brake fluid level switch (brake fluid is insufficient).

2. After starting engine, brake warning lamp is turned off.

Basic Inspection AFS002PC

BRAKE FLUID LEVEL, LEAKAGE AND BRAKE PAD

1. Check fluid le vel in the brake fluid reservoir tank. Refill the brake flui d if fluid level is low.

2. Check the area around the brake piping and VDC actuator for leakage. If leakage or oozing is detected, check as follows :

● If VDC actuator connections are loose, tighten piping to the specified torque. Check again for leakage,

and make sure that there is no fluid leakage.

● If the flar e nuts at the connections and the thr eads of the VDC actuator are damaged, replace the dam-

aged parts. Then check again for leakage, and make sure that there is no fluid leak.

● If leakage or oozing is detecte d on parts other than VDC actuat or connec tions, wipe with a c lean clo th

and check again. If there is still leakage or oozing, replace the damaged part.

● If leakage o r ooz i ng is de te cted on V DC ac tu at o r bo dy, wipe with a clean cloth a nd c he ck ag ai n. I f th ere

is still leakage or oozing, replace VDC actuator.

CAUTION:

VDC actuator cannot be disassembled.

3. Check brake disc rotor and pads. Front disc rotor: BR-30, "

25, "PAD WEAR INSPECTION" , Rear disk rotor: BR-35, "DISC ROTOR INSPECTION" , Rear pad: BR31, "PAD WEAR INSPECTION" .

POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY

Check battery for looseness on the battery positive/negative terminal and ground connection. Also make sure that battery voltage does not drop.

ABS WARNING LAMP, BRAKE WARNING LAMP, VDC OFF INDICATOR LAMP, AND SLIP INDICATOR LAMP

1. Make sure that when th e ignition switch is turned ON, th e ABS warning lamp, VDC OFF indicato r lamp (when VDC OFF switch is off), and SLIP indicator lamp turn on, and that the brake warning lamp turns on. If they do not turn on, perform CAN communication circuit diagnosis. Refer to BRC-85, "

tion" . Be sure to check VDC OFF switch before checking VDC OFF indicator lamp. Refer to BRC-85, "VDC OFF SWITCH" . Check VDC OFF indicator lamp if there is no malfunction in CAN communication

circuit and VDC OFF switch. Refer toBRC-92, "

2. Check if the ABS warning lamp, VDC OFF indicat or lamp, an d SLIP indic ator lamp turn off after the ign ition switch is turned ON, and if the brake warning lamp turns off after the engine is started. If they do not turn off, perform self-diagnosis.

3. With the engine running, make sure that the VDC OFF indicator lamp turns on and off when the VDC OFF switch turns ON and OFF. If it does not operate in accordance with the switch, check the VDC OFF switch system. Refer to BRC-85, "

4. Perform self -dia gnos is of VD C actu ator if ABS w arnin g lamp , VDC OFF indi cator lamp , and SLI P in dicato r lamp do not turn off 10 seconds after engine is started.

VDC OFF Indicator Lamp Indication Is Not Normal" .

VDC OFF SWITCH" .

DISC ROTOR INSPECTION" , Front pad: BR-

CAN Communica-

BRC

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TROUBLE DIAGNOSIS

[VDC/TCS/ABS]

5. Always erase self-diagnostic results after completing self-diagnosis. Refer to BRC-61, "ERASE MEM-

ORY" .

NOTE:

Brake warning lamp tu rns on during parking brake opera tion (when switch is ON) and b rake fluid level switch operation (insufficient brake fluid).

Revision: 2006 July 2006 X-Trail

BRC-70

Page 71

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM PFP:00000

Wheel Sensor AFS002OE

INSPECTION PROCEDURE

Check each part according to CONSULT-II self-diagnostic results, and then identify the parts to be replaced.

CAUTION:

Do not check between wheel sensor terminals.

1. CHECK TIRES

Check air pressure, wea r and size. Are air pressur e, wear and size within standard?

YES >> GO TO 2. NO >> Adjust air pressure, or replace tire.

2. CHECK SENSOR AND SENSOR ROTOR

● Check sensor rotor for damage.

● Check wheel sensor for damage, disconnection or looseness. Refer to BRC-93, "WHEEL SENSORS" ,

BRC-94, "

OK or NG

OK >> GO TO 3. NG >> Repair wheel sensor mount or replace sensor rotor.

SENSOR ROTOR" .

3. CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Self-diagnostic results

FR RH SENSOR-1, -2

FR LH SENSOR-1, -2

RR RH SENSOR-1, -2

RR LH SENSOR-1, -2

Is above displayed on self-diagnosis display?

YES >> GO TO 4. NO >> INSPECTION END

4. CHECK CONNECTOR

BRC

1. Turn ignition swit ch O FF a nd di sconne ct VDC/ TCS/A BS co nt rol u nit c onn ector and ma lfunctio ni ng wh eel sensor connecto r. Check terminal to see if it is def ormed, di scon nec ted, lo ose, e tc., an d repair or replac e it if any malfunction condition is found.

2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then perform self-diagnosis.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, damaged, open or sho rted. NO >> GO TO 5.

Revision: 2006 July 2006 X-Trail

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TROUBLE DIAGNOSIS FOR SYSTEM

5. CHECK WHEEL SENSOR HARNESS

1. Turn ignition switch OFF and disconnect malfunctioning wheel sensor connector and VDC/TCS/ABS control unit connector.

2. Check continuity between terminals. (Also check continuity when the steering wheel is turned right and left and when the sensor harness inside the wheel house is moved.)

Power supply circuit Signal circuit Ground circuit

VDC/TCS/ABS

Wheel

Front RH (E17) 16 1 15 2 16, 15 Front LH (E59) 10 1 8 2 10, 8 Rear RH

(B130) Rear LH

(B126)

control unit

(harness con-

nector E122)

12 1 11 2 12, 11

14 1 13 2 14, 13

Wheel sensor (harness con-

nector)

VDC/TCS/ABS

control unit

(harness con-

nector E1 22)

Wheel sensor (harness con-

nector)

VDC/TCS/ABS con-

trol unit (signal)

(harness connector

[VDC/TCS/ABS]

SFIA2405E

Ground

E122)

—

Power supply circuit : Continuity should exist. Signal circuit : Continuity should exist. Ground circuit : Continuity should not exist.

OK or NG

OK >> GO TO 6. NG >> Repair or replace harness and connector that have malfunction.

6. CHECK WHEEL SENSOR

1. Replace w heel sensor that resulted in malfunction by self-diagnosis.

2. Reconnect conn ectors, dri ve vehicle a t 30 km/h (19 MPH) or mo re for approx imately 1 min ute, and th en perform self-diagn os is .

Self-diagnostic results FR RH SENSOR-1, -2 FR LH SENSOR-1, -2

RR RH SENSOR-1, -2

RR LH SENSOR-1, -2

Is above displayed on self-diagnosis display?

YES >> Wheel sensor has malfunction. NO >>

● Replace VDC/TCS/ABS control un it.

● Perform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.

FURTHER TESTING MAY BE REQUIRED.”

Revision: 2006 July 2006 X-Trail

BRC-72

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TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

Engine System AFS002OF

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

ENGINE SYSTEM 1 ENGINE SYSTEM 2 ENGINE SYSTEM 3 ENGINE SYSTEM 4

ENGINE SYSTEM 6

Is above displayed on self-diagnosis displayed?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK ENGINE SYSTEM

1. Perform ECM self-diagnosis. Repair or replace items indicated, then perform ECM self-diagnosis again.

2. Perform VDC/TCS/ABS control unit self-diagnosis again. OK or NG

OK >> INSPECTION END NG >> Repair or replace items indicated, and perform VDC/TCS/ABS control unit self-diagnosis again.

VDC/TCS/ABS Control Unit AFS002OG

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

BRC

Check self-diagn os tic res ults.

Self-diagnostic results

CONTROLLER FAILURE

EMERGENCY BRAKE

CAUTION:

Replace VDC/TCS/ABS control unit when self-diagnostic r e sult shows items other than those above.

Is above displayed in the self-diagnosis display items?

YES >> 1. Replace VDC/TCS/ABS control unit, and perform self-diagnosis again.

2. Perform to self-diagnosis again, and make sure that the result shows "NO DTC IS DETECTED."

NO >> INSPECTION END

Pressure Sensor AFS002OH

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

PRESSURE SEN CIRCUIT

Is above displayed in the self-diagnosis display items?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

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TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

2. CHECK CONNECTOR

1. Turn ignition switch OFF and di sc o nn ec t pre ss ure se ns or c on ne cto r an d VDC /T C S/ABS control unit con nector, check terminals for defamation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.

2. Reconnect connectors and re-perform VDC/TCS/ABS control unit self-diagnosi s.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

3. CHECK PRESSURE SENSOR CIRCUIT

1. Turn ignition switch OFF and disconnect VDC actuator connector E67 and VDC/TCS/ABS control unit connec tor.

2. Check continuity between VDC/TCS/ABS control unit harness connector E122 and VDC actuator harness connector E67.

VDC/TCS/ABS control

unit

(harness connector

E122)

69 30

67 32

(VDC actuator harness connector E67)

Pressure sensor

Continuity

Yes68 31

SFIA2444E

OK or NG

OK >> GO TO 4. NG >> Repair or replace the disconnected harness.

4. CHECK PRESSURE SENSOR

1. Connect pressure sensor connector and VDC/TCS/ABS control unit connector.

2. Check pressure sensor value on “DATA MONITOR”.

Condition Data monitor display Brake pedal is depressed Positive value Brake pedal is released Approx. 0 bar

OK or NG

OK >> Perform self-diagnosis again. NG >> Pressure sensor malfunction. Replace VDC actuator (inside pressure senso r).

Steering Angle Sensor AFS002OI

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

Self-diagnostic results

ST ANGLE SEN CIRCUIT

Is above displayed in the self-diagnosis display items?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

BRC-74

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TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

2. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect steering angle sensor connector and VDC/TCS/ABS control unit connector. And check terminals for deformati on, discon nection, lo oseness, an d so on. If any mal function is found, repair or replace terminal.

2. Reconnect connectors and perform a VDC/TCS/ABS control unit self-diagnosis again.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, damaged, open or sho rted. NO >> GO TO 3.

3. CHECK STEERING ANGLE SENSOR CIRCUIT

1. Check CAN communication circuit. Refer to BRC-85, "

2. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector and steering angle sensor connector.

3. Check continuity between VDC/TCS/ABS control unit harness connector E122 and steering angle sensor harness connector M81.

VDC/TCS/ABS control

unit

(harness connector

E122)

2 3 Yes

Steering angle sensor

(harness connector M81)

OK or NG

OK >> GO TO 4. NG >> Open or short in harness. Repair or replac e harness.

CAN Communication" .

Continuity

SFIA2445E

BRC

4. DA TA MONITOR CHECK

1. Connect the steering angle sensor connector and VDC/TCS/ABS control unit connector.

2. Perform "DATA MONITOR" of the "STR ANGLE SIG" to check if the status is normal.

Steering condition Date monitor

Driving straight -5° to+5°

Turn 90° to right Approx. +90°

Turn 90° to left Approx. -90°

OK or NG

OK >> Perform self-diagnos is again. NG >> Replace spir al ca ble (stee rin g an gle s ens or) an d ad just neut ral p ositi on o f ste eri ng a ngle senso r.

Refer to BRC-43, "

Adjustment of Steering Angle Sens or Neutral Position" .

Revision: 2006 July 2006 X-Trail

BRC-75

Page 76

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

Ya w Rate/Side G Sensor AFS002OJ

CAUTION:

Sudden turns (such as spin turns, acceleration turns), driftin g, etc. When VDC function is off (VDC OFF switch "ON") may cause yaw rate/side G-sensor sy stem to indicate a ma lfunction. Howeve r, this is not a malfunction, if norma l operation can be resumed after restarting engine. T hen erase memory of self-diagnosis.

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

Self-diagnostic results

YAW RATE SEN

SIDE G SEN CIRCUIT

CAUTION:

If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VDC OFF indicator lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turntable or other moving surface, and start engine. Results will return to norma l. And after doing spin turns or acceleration turns with VDC function is off (VDC OFF switch “ON”), too, the results will return to a normal state by re-starting vehicle.

Is above displayed in the self-diagnostic item?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect yaw rate/side G sensor connector and VDC/TCS/ABS control unit connector and c heck termi nals for defo rmatio n, dis con necti on, lo osen ess, and so on. If an y mal func tion is found, repair or replace termina l.

2. Reconnect connectors a nd perform a VDC/TCS/ABS control unit self-diagnosis again.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

3. CHECK YAW RATE/SIDE G SENSOR HARNESS

1. Turn ignition switch OFF and disconnect yaw rate/side G sensor connector and VDC/TCS/ABS control unit connector.

2. Check continuity between VDC/TCS/ABS control unit harness connector E122 an d yaw rate/s ide G sensor harness con nector B112.

VDC/TCS/ABS control unit (harness connector E122)

78 1 77 2 34 3 79 4 18 5 80 6

Yaw rate/ Side G sensor

(harness connector B112)

Continuity

Yes

SFIA2446E

OK or NG

OK >> GO TO 4. NG >> Open or short in harness. Repai r or replace harne ss.

Revision: 2006 July 2006 X-Trail

BRC-76

Page 77

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

4. PERFORM DATA MONITOR

1. Connect yaw rate /side G sensor connector and VDC/TCS/ABS control unit connector.

2. Use "DATA MONITOR" to check if the yaw rate/side G sensor is normal.

Vehicle condition

Stopped – 4 to +4 deg/s

Turning right Negative value Negative value

Turning left Positive value Positive value

Yaw rate sensor

(Data monitor standard)

Side G sensor

(Data monitor standard)

– 1.1 to +1.1 m/s

OK or NG

OK >> Perform self-diagnos is again. NG >> Malfunction of yaw rate/side G sensor. Replace sensor and perform self-diagnosis again.

Solenoid and VDC Switching Valve AFS002OK

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

FR LH IN ABS SOL

FR LH OUT ABS SOL

RR RH IN ABS SOL

RR RH OUT ABS SOL

FR RH IN ABS SOL

FR RH OUT ABS SOL

RR LH IN ABS SOL

RR LH OUT ABS SOL

USV LINE [FL-RR] USV LINE [FR-RL] HSV LINE [FL-RR] HSV LINE [FR-RL]

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

BRC

2. CHECK CONNECTOR

1. Turn ignition switch OFF, disconnect VDC/TCS/ABS co ntrol unit c onnector, and check terminal f or deformation, disconnection, looseness, and so on. If there is a malfunction, repair or replace terminal.

2. Connect the connector securely and perform se lf-diagnosis again.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, damaged, open or sho rted. NO >> GO TO 3.

Revision: 2006 July 2006 X-Trail

BRC-77

Page 78

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

3. CHECK SOLENOID AND VDC SWITCHING VALVE HARNESS

1. Turn ignition switch OFF and disconnect VDC actuator connector E67,E68 and VDC/TCS/ABS control unit connector.

2. Check continuity between VDC/TCS/ABS control unit harness connector E122 and VDC actuator harness connector E67, E68.

SFIA2414E

Item

FR LH IN SOL 5 1

FR LH OUT SOL 3 14

RR RH IN SOL 6 7

RR RH OUT SOL 4 17

FR RH IN SOL 26 3

FR RH OUT SOL 55 15

RR LH IN SOL 53 5

RR LH OUT SOL 25 16 USV LINE [FL-RR] 49 26 USV LINE [FR-RL] 50 25 HSV LINE [FL-RR] 54 28 HSV LINE [FR-RL] 52 27

VDC/TCS/ABS control unit

(harness connector E122)

(harness connector E67,E68)

VDC actuator

OK or NG

OK >> GO TO 4. NG >> Open or short in harness between VDC/TCS/ABS control unit and VDC actuat or.

4. CHECK SOLENOID AND VDC SWITCHING VALVE INPUT SIGNAL

1. Disconnect VDC relay box connector.

2. Check resistance of VD C actuator solenoid.

Continuity

Yes

VDC actuator connector

1, 3, 5, 7, 25, 26

14, 15, 16, 17, 27, 28 3.0 - 5.0 Ω

VDC relay box

(harness connector E57)

Resistance value

6.0 - 11 Ω

SFIA2447E

OK or NG

OK >> Check power supply circuit of VDC/TCS/ABS control unit. Refer to BRC-82, "VDC/TCS/ABS Con-

trol Unit Power And Ground" .

NO >> Replace VDC act uator assembly .

Revision: 2006 July 2006 X-Trail

BRC-78

Page 79

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

Actuator Motor and Motor Relay AFS002OL

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

PUMP MOTOR, MOTOR RELAY

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector, VDC actuator connector and VDC relay box connector. Then reconnect them securely.

2. Reconnect co nn ec to rs se cu rely and perform self-diag no si s ag ai n.

Is the result of self-diagnosis normal?

YES >> Connector terminal contact is loose, damaged, open or sho rted. NO >> GO TO 3.

3. CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT

1. Disconnect VDC relay box connector E55.

2. Check voltage between VDC relay box harness connector E55 and ground.

VDC relay box

(harness connector

E55)

10 —

Ground Voltage

Battery voltage (Approx.

12 V)

BRC

OK or NG

OK >> GO TO 4. NG >> The circuit between battery and relay unit terminal No. 10 is ope n or shorted. Repair circuit.

4. CHECK ABS MOTOR AND MOTOR RELAY HARNESS

1. Disconnect VDC/TCS/ABS control unit and VDC relay box connector E56.

2. Check continuity between VDC/TCS/ABS control unit harness connector E122 and VDC relay box harness connector E56.

VDC/TCS/ABS control unit

(harness connector E122)

20 4 Yes

7 8 Yes

VDC relay box

(harness connector E56)

Continuity

SFIA2366E

SFIA2448E

Revision: 2006 July 2006 X-Trail

BRC-79

Page 80

TROUBLE DIAGNOSIS FOR SYSTEM

OK or NG

OK >> GO TO 5. NG >> Open or short in harness. Repai r or replace harne ss.

5. CHECK ACTUATOR MOTOR

Check if actuator motor operates after energizing approximately 12V to the connector terminal 15 at the VDC relay box harness connector E57.

CAUTION:

To prevent overheating, d o not drive actuato r motor more than 4 seconds.

OK or NG

OK >> GO TO 6. NG >> Actuator motor or actuator motor circuit open or short in

harness. Replace VDC actuat or.

6. CHECK MOTOR RELAY UNIT

[VDC/TCS/ABS]

SFIA2368E

Check motor relay as a unit. Refer to BRC-86, " OK or NG

OK >> Replace VDC/TCS/ABS control unit. NG >> Replace VDC relay box.

MOTOR RELAY AND ACTUATOR RELAY" .

Actuator Relay AFS002OM

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

Self-diagnostic results

MAIN RELAY

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF, disconne ct VDC/TCS/ABS control un it conn ector, and check terminal for defor mation, disc onnection, looseness, and so on . If there is a malfunction, repair or replace terminal.

2. Connect the connector securely and perform self-diagnosis again.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

Revision: 2006 July 2006 X-Trail

BRC-80

Page 81

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

3. CHECK ACTUATOR RELAY POWER SUPPLY CIRCUIT

1. Turn i gnition switch OFF and disconnect VDC relay box connector E55.

2. Check voltage between VDC relay box harness connector E55 and ground.

VDC relay box

(harness connector E55)

9 —

Ground Voltage

Battery voltage

(Approx. 12V)

OK or NG

OK >> GO TO 4. NG >>

● Check the fuse 30 A.

● The circuit between battery and relay unit terminal No. 9 is open or shorted. Repair circuit.

4. CHECK ACTUATOR RELAY HARNESS

1. Disconnect VDC/TCS/ABS control unit connector and VDC relay box connector E56.

2. Check continuity between VDC/TCS/ABS control unit harness connector E122 and VDC relay box harness connector E56.

SFIA2369E

BRC

VDC/TCS/ABS control unit

(harness connector E122)

2 5 Yes

36 7 Yes

VDC relay box

(harness connector E56)

Continuity

SFIA2449E

OK or NG

OK >> GO TO 5. NG >> Open or short in harness between VDC/TCS/ABS control unit and V DC relay box.

5. CHECK ACTUATOR RELAY UNIT

Check actuator relay as a unit. Refer to BRC-86, " OK or NG

OK >> Replace VDC/TCS/ABS control unit. NG >> Replace VDC relay box.

Stop Lamp Switch Circuit AFS002ON

INSPECTION PROCEDURE

MOTOR RELAY AND ACTUATOR RELAY" .

1. CHECKING SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

STOP LAMP SW

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

BRC-81

Page 82

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

2. CHECK CONNECTOR

1. Tu r n ign it i on swit c h OFF and disc on ne ct stop la mp swit c h co nn ecto r an d VD C/ TCS/ A BS control unit connector.

2. Reconnect connectors securely.

3. Start engine.

4. Repeat pumping brake pedal carefully several times, and perform self-diagnosis again.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

3. CHECK STOP LAMP SWITCH CIRCUIT

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit harness connector.

2. Check voltage between VDC/TCS/ABS control unit harness connector E122 terminal 48 and ground.

VDC/TCS/ABS control unit

(harness connector E122)

48 —

OK or NG

OK >> Connect connector securely and perform self-diagnosis again. NG >> Stop lamp switch circuit malfunction. Repair circuit.

Ground

Measurement

condition

Brake pedal

depressed

Brake pedal not

depressed

Battery voltage

(Approx. 12V)

12 V

approx. 0V

SFIA2450E

VDC/TCS/ABS Control Unit Power And Ground AFS002OO

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

Self-diagnostic results

BATTERY VOLTAGE

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector. Then reconnect it securely.

2. Perform self-diagnosis.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

Revision: 2006 July 2006 X-Trail

BRC-82

Page 83

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

3. CHECK VDC/TCS/ABS CONTROL UNIT POWER AND GROUND CIRCUIT

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector.

2. Turn i gnit i on s w itch O N or OFF a nd c heck vo l t ag e an d cont in ui ty between VDC/TCS/ABS control unit harness connector E122 and ground.

Signal

Power supply 1 —

VDC/TCS/ABS control unit

(harness connector E122)

Ground Condition Voltage

Ignition switch turn ON

Ignition switch turn OFF Approx. 0V

SFIA2372E

Battery voltge (Approx. 12V)

BRC

SFIA2408E

Signal

Ground 28, 29 — Ignition switch turn OFF Yes

VDC/TCS/ABS c ont rol unit

(harness connector E122)

Ground Condition Continuity

OK or NG

OK >> Check battery for loose terminal and low voltage malfunction. Repair if necessary. NG >> Corresponding harness circuit malfunction. Repair circuit.

Park/Neutral Position (PNP) Switch (Only A/T Models) AFS002OP

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagn os tic res ults.

Self-diagnostic results

SHIFT POSITION ERROR

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

Revision: 2006 July 2006 X-Trail

BRC-83

Page 84

TROUBLE DIAGNOSIS FOR SYSTEM

2. PERFORM DATA MONITOR

In “DATA MONITOR” select “ITEM MENU” and then check P position.

[VDC/TCS/ABS]

Selector lever position

P position ON

Other than P position. OFF

OK or NG

OK >> Perform self-diagnosis again. NG >> GO TO 3.

Position

(data monitor)

3. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH

Perform Park/Neu tral positi on (PNP) s witch insp ection . Refer to AT-95, "

TION (PNP) SWITCH" .

OK or NG

OK >> Perform self-diagnosis again. NG >> Repair indicated items and perform self-diagnosis again.

Brake Fluid Level Switch AFS002OR

INSPECTION PROCEDURE

DTC P0705 PARK/NEUTRAL POSI-

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

Self-diagnostic results

BR FLUID LEVEL LOW

Is above displayed in the self-diagnosis item?

YES >> GO TO 2. NO >> INSPECTION END

2. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect brake fluid level switch connector and VDC/TCS/ABS control unit connector. And check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace termina l.

2. Reconnect connectors a nd perform a VDC/TCS/ABS control unit self-diagnosis again.

Is the result of self-diagn os is norm al ?

YES >> Connector terminal contact is loose, damaged, open or shorted. NO >> GO TO 3.

3. CHECK BRAKE FLUID LEVEL SWITCH

1. Turn ignition switch OFF and disconnect brake fluid level switch connector.

2. Check continuity between brake fluid level switch connector terminal 1 and 2.

Between terminal 1 and 2 When brake fluid is full in

the reservoir tank When brake fluid is empty

in the reservoir tank

OK or NG

OK >> Go to 4 NG >> Impaired brake fluid level switch

: No

: Yes

SFIA2461E

Revision: 2006 July 2006 X-Trail

BRC-84

Page 85

TROUBLE DIAGNOSIS FOR SYSTEM

[VDC/TCS/ABS]

4. CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND VDC/TCS/ABS CONTROL UNIT

1. Disconnect VDC/TCS/ABS contr ol unit.

2. Check continu ity between brake fluid level switch connector and VDC/TCS/ABS control unit connector.

VDC/TCS/ABS control unit harness connector

Ground 2 Yes

OK or NG

OK >> Connect connectors securely and perform self-diagno-

sis again.

NG >> Impaired harness or terminal. Replace or repair harness

or terminal.

Brake fluid level switch

connector

1Yes

Ground No

Continuity

SFIA2490E

BRC

CAN Communication AFS002OS

INSPECTION PROCEDURE

1. CHECK CONNECTOR

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector and steering angle sensor connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, rep a ir or replace terminal.

2. Securely reconnect connectors and perform self-diagnos is.

Self-diagnostic results

CAN COMM CIRCUIT

ST ANG SEN COM CIR

Is above displayed in the self-diagnosis item?

YES >> Print out self-diagnostic results and go to LAN -4, "TROUBLE DIAGNOSES WORK FLOW" . NO >> Connector terminal connect ion is loose, damaged, open or shorted.

Component Inspection AFS002OT

VDC OFF SWITCH

● Turn ignition switch is OFF and disconnect VDC OFF switch

connector. Check continuity between terminal 1 and 2.

1–2: Pressing switch will establish continuity,

releasing it will break continuity.

SFIA2409E

Revision: 2006 July 2006 X-Trail

BRC-85

Page 86

TROUBLE DIAGNOSIS FOR SYSTEM

PARKING BRAKE SWITCH

● Turn ignition switch OFF. Check continuity between parking

brake switch connector B114 and ground

[VDC/TCS/ABS]

Parking brake

switch connector

B114

1—

Ground

Measurement

condition

Pulling the control

lever

Not pulling the

control lever

Continuity

Yes

BRAKE FLUID LEVEL SWITCH

● Refer to BRC-84, "Brake Fluid Level Switch" .

MOTOR RELAY AND ACTUATOR RELAY

● Turn ignition switch OFF and disconnect VDC/TCS/ABS relay

box connector.

● Check continuit y betwe en the te rmina ls lis ted be low wh en en er-

gizing 12V bet ween motor relay terminal 8 and 5, between actuator terminal 5 and 7.

Motor relay Terminals between 10 and 4

Actuator relay Terminals between 9 and 16

Yes

SFIA2460E

SFIA2451E

Revision: 2006 July 2006 X-Trail

BRC-86

Page 87

TROUBLE DIAGNOSIS FOR SYSTEM

VDC ACTUATOR

1. Turn ignition switch OFF, apply a voltage of 12 V between VDC relay box connector terminal 5 and 8, use an oscilloscope to measure motor voltage at this time (between terminal 4 and ground), and check motor reverse voltage occurrence time when operatio n is stopped.

Motor reverse voltage occurrence time:

0.1 second or more

CAUTION:

● Above check should be performed after motor relay unit

inspection to make sure relay operates normally.

● To prevent overheating, do not drive actuator moto r more

than 4 seconds.

● Motor reverse voltage occurrence time is standard when

battery voltage is 12 V and the air temperature is 20°C (68°F), and this time is a little shorter when battery voltage is low or the air temperature is low.

Disconnect VDC actuator connectors. Check continuity and resistance value between any pair of terminals on the actuator .

[VDC/TCS/ABS]

BRC

SFIA2452E

Revision: 2006 July 2006 X-Trail

BRC-87

Page 88

TROUBLE DIAGNOSIS FOR SYMPTOMS

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYMPTOMS PFP:00007 Excessive ABS Function Operation Frequency AFS002OU

1. CHECK START

Check longitud i na l br ak e for c e d istr i but io n u si ng a b r ak e te st er. Refer to BR-37, "

IFICATIONS (SDS)" .

OK or NG

OK >> GO TO 2. NG >>

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

SERVICE DATA AND SPEC-

2. CHECK FRONT AND REAR AXLE

Make sure that there is no excessive play in the front and rear axles. Refer to Front: FSU-6, "

Inspection and Service" , Rear: RSU-5, "On-Vehicle Inspection and Service" .

OK or NG

OK >> GO TO 3. NG >> Repair.

3. CHECK WHEEL SENSOR AND SENSOR ROTOR

Check wheel sensor and sensor rotor for the following.

● Wheel sensor installation for damage

● Wheel sensor rotor instal lation for damage

● Wheel sensor connector connection

● Wheel sensor harness inspection

OK or NG

OK >> GO TO 4. NG >>

● Replace whe el se ns or or se ns or roto r.

● Repair harness.

On-Vehicle

4. CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. OK or NG

OK >> Normal NG >> Perform self-diagnosis. Refer to BRC-61, "

Self-Diagnosis" .

Unexpected Pedal Reaction AFS002OV

1. CHECK BRAKE PEDAL STROKE

Check brake pedal stroke. Refer to BR-6, " Is the stroke too big?

YES >> ● Bleed air from the brak e piping. Refer to BR-10, "Bleeding Brake System" .

● Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-

tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal: BR-7, " brake booster and master cylinder: BR-22, "

NO >> GO TO 2.

Revision: 2006 July 2006 X-Trail

Inspection and Adjustment" .

COMPONENTS" ,

COMPONENTS" .

BRC-88

Page 89

TROUBLE DIAGNOSIS FOR SYMPTOMS

[VDC/TCS/ABS]

2. CHECK FUNCTION

Disconnect VDC/TCS/ABS control unit connector to deacti vate ABS. Check if braking forc e is normal in this condition. Connect connector after inspection.

OK or NG

OK >> GO TO procedure 3″CHE CK WHEEL SENSOR AND S ENSOR ROTOR″ of symptom 1. Refer to

Excessive ABS Function Operation Frequency" .

NG >>

BRC-88, "

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

The Stopping Distance Is Long AFS002OW

CAUTION:

The stopping distance on s lippery road surf aces might be longe r with the ABS operating than when the ABS is not operating.

1. CHECK FUNCTION

Turn ignition switch OFF. Dis connect VDC/TCS/ABS contro l unit connector to deactiva te ABS. In this condition, check stopping distance. After inspection, connect connector.

OK or NG

OK >> GO TO procedure 3″CHE CK WHEEL SENSOR AND S ENSOR ROTOR″ of symptom 1. Refer to NG >>

BRC-88, "

● Bleed air from the brake pipin g. Refer to BR-10, "Bleeding Brake System" .

● Check the following system. If any malfunction is found, repair or replace malfunctioning parts.

Excessive ABS Function Operation Frequency" .

BRC

Revision: 2006 July 2006 X-Trail

BRC-89

Page 90

TROUBLE DIAGNOSIS FOR SYMPTOMS

[VDC/TCS/ABS]

ABS Function Does Not Operate AFS002OX

CAUTION:

ABS does not operate when speed is 10 km/h (6 MPH) or lower.

1. CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp turns off after the ignition switch is turned ON or when driving. OK or NG

OK >> GO TO procedure 3″CHECK WHEEL SENSOR AND SENSOR ROTOR″ of symptom1 . Refer to

BRC-88, "

NG >> Perform self-diagnosis. Refer to BRC-61, "

Pedal Vibration or ABS Operation Sound Occurs AFS002OY

CAUTION:

Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed (just place a foot on it). However, this is normal.

● When shifting gears

● When driving on slippery road

● During cornering at high speed

● When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]

● When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or more]

Excessive ABS Function Operation Frequency" .

Self-Diagnosis" .

1. SYMPTOM CHECK 1

Check if there i s pedal vibration or operation noise when the engine is star ted. Do symptoms occur?

YES >> GO TO 2. NO >> Perform self-diagnosis. Refer to BRC-61, "

Self-Diagnosis" .

2. SYMPTOM CHECK 2

Check symptoms when electrical component (headlamps, etc.) switches are operated. Do symptoms occur?

YES >> Check if there is a radio, antenna, an tenna lead wire, or wiring close to the control unit. If there is,

move it farther away.

NO >> GO TO procedure 3″CHECK WHEEL SENSOR AND SENSOR ROTOR″ of sympto m1. Refer to

BRC-88, "

Excessive ABS Function Operation Frequency" .

Vehicle Jerks During VDC/TCS/ABS Control AFS002OZ

1. SYMPTOM CHECK

Check if the vehicle jerks during VDC/TCS /ABS control. OK or NG

OK >> Normal NG >> GO TO 2.

2. CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnostic of VDC/TCS/ ABS contro l un it. Are self-diagnostic results indicated?

YES >> Check the corresponding i tems, make repairs, and p erform V DC/TCS/ABS contro l unit self-diag -

nosis.

NO >> GO TO 3.

Revision: 2006 July 2006 X-Trail

BRC-90

Page 91

TROUBLE DIAGNOSIS FOR SYMPTOMS

[VDC/TCS/ABS]

3. CHECK CONNECTOR

1. Turn ignition switch OFF, disconnect the VDC/TCS/ABS co nt rol u ni t c o nn ector and check the terminal for deformation, disconnection, looseness, and so on.

2. Securely connect connectors. Perform VDC/TCS/ABS control unit self-diagnosis.

Are self-dia gnostic results indicate d?

YES >> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace. NO >> GO TO 4.

4. CHECK ECM AND TCM SELF-DIAGNOSTIC RESULTS

Perform ECM and TCM self-d ia gn os is . Are self-dia gnostic results indicate d?

YES >> ● Check the corresponding items.

– ECM: Refer to EC-83, "TROUBLE DIAGNOSIS" . – TCM: Refer to AT-42, "TROUBLE DIAGNOSIS" .

NO >> Replace VDC actuator.

ABS Warning Lamp Indication Is Not Normal AFS002QC

NOTE:

Lighting condition of ABS warning lamp refer to BRC-68, "

VDC OFF Indicator Lamp, SLIP Indicator Lamp and Brake warning lamp." .

ON and OFF Timing for ABS Warning Lamp,

1. CHECK COMBINA TION METER INDICATION

BRC

Check the combin ation mete r indication and operation. Re fer to DI-14, "

Meter" .

OK or NG

OK >> GO TO 2. NG >> Combination meter is malfunctioning. Check combination meter. Refer to DI-4, "

METERS" .

Self-Diagnosis M ode o f Combi nation

COMBINATION

2. CHECK SELF DIAGNOSTIC RESULTS

Check the self-diagnostic results of VDC/TCS/ABS control unit. Refer to BRC-61, " OK or NG

OK >> GO TO procedure 1 of symptom 7. NG >> Check the items indicated with self-diagnosis.

Slip Indicator Lamp Indication Is Not Normal AFS002QD

NOTE:

Lighting condition of slip indicator lamp refer to BRC-68, "

VDC OFF Indicator Lamp, SLIP Indicator Lamp and Brake warning lamp." .

ON and OFF Timing for ABS Warning Lamp,

Self-Diagnosis" .

1. CHECK COMBINA TION METER INDICATION

Check the combin ation mete r indication and operation. Re fer to DI-14, "

Meter" .

OK or NG

OK >> GO TO 2. NG >> Combination meter is malfunctioning. Replace combinati on meter.

Self-Diagnosis M ode o f Combi nation

2. CHECK SELF DIAGNOSTIC RESULTS

Check the self-diagnostic results of VDC/TCS/ABS control unit. Refer to BRC-61, " OK or NG

OK >> GO TO procedure 1 of symptom 8. NG >> Check the items indicated with self-diagnosis.

Revision: 2006 July 2006 X-Trail

BRC-91

Self-Diagnosis" .

Page 92

TROUBLE DIAGNOSIS FOR SYMPTOMS

[VDC/TCS/ABS]

VDC OFF Indicator Lamp Indication Is Not Normal AFS002QE

NOTE:

● Lighting conditio n of VDC OFF indicator lamp refer to BRC-68, "ON a nd OFF Timing for ABS Warning

Lamp, VDC OFF Indicator Lamp, SLIP Indicator Lamp and Brake warning lamp." .

● Make sure that VDC OFF switch is normal. Refer to BRC-85, "VDC OFF SWITCH" .

1. CHECK COMBINATION METER INDICATION

Check the combina tion meter indic ation and opera tion. Refe r to DI-14, "

Meter" .

OK or NG

OK >> GO TO 2. NG >> Combination meter is malfunctioning. Check combination meter. Refer to DI-4, "

METERS" .

Self-Diagnosis Mode of Combination

COMBINATION

2. CHECK SELF DIAGNOSTIC RESULTS

Check the self-diag nostic results of VDC/TCS/ABS control unit. Refer to BRC-61, " OK or NG

OK >> GO TO procedure 1 of symptom 9. NG >> Check the it ems indicated with self-diagnosis.

Brake Warning Lamp Indication Is Not Normal AFS002QF

NOTE:

● Lighting conditio n of brake w arning lamp refer to BRC-68, "ON and OFF Timing for ABS Warning Lamp,

VDC OFF Indicator Lamp, SLIP Indicator Lamp and Brake warning lamp." .

● Make sure that brake fluid level switch is normal. Refer to BRC-86, "BRAKE FLUID LEVEL SWITCH" .

Self-Diagnosis" .

1. CHECK COMBINATION METER INDICATION

Check the combina tion meter indic ation and opera tion. Refe r to DI-14, "

Meter" .

OK or NG

OK >> GO TO 2. NG >> Combination meter is malfunctioning. Check combination meter. Refer to DI-4, "

METERS" .

Self-Diagnosis Mode of Combination

COMBINATION

2. CHECK SELF DIAGNOSTIC RESULTS

Check the self-diag nostic results of VDC/TCS/ABS control unit. Refer to BRC-61, " OK or NG

OK >> GO TO procedure 1 of symptom 10. NG >> Check the it ems indicated with self-diagnosis.

Revision: 2006 July 2006 X-Trail

BRC-92

Self-Diagnosis" .

Page 93

WHEEL SENSORS

[VDC/TCS/ABS]

WHEEL SENSORS PFP:47910

Removal and Installation AFS002P0

COMPONENTS

BRC

SFIA2394E

REMOVAL

Be careful of the following.

CAUTION:

When removing the sens or, do not rotate it, if possible, and also do not forcibly pul l the sensor harness.

INSTALLATION

Tighten the mounting bolts and nuts to the specified torque. Refer to BRC-93, "Removal and Installation"

CAUTION:

Be careful of the following when installing sensor.

● When installing, ma ke sure there is no fo reign m aterial s uch as iro n chips on p ick-up and mount-

ing hole of sensor. Make sure no foreign material has bee n caught in the sensor rotor. Remove any foreign material and clean the mount.

● When installing front sensor, be sure to press rubber grommets in until they lock at the three loca-

tions shown in the figure (2 at shock absorbers and 1 at body panel). When installed, harness must not be twisted. White line on harness must be visible from front.

● When installing rear sensor, attach harness at rear suspension memb er securely. Besides, har-

ness must not be twisted when installed.

Revision: 2006 July 2006 X-Trail

BRC-93

Page 94

SENSOR ROTOR

[VDC/TCS/ABS]

SENSOR ROTOR PFP:47970 Removal and Installation AFS002P2

REMOVAL Front

Remove rear senso r roto r from drive shaf t. Refe r to FA X-26, "Disassembly and Assembly (Models with AWD:

RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to remove rear sensor rotor. Refer to RAX-22, "Disassembl y and Assembly" .

● Remove rear drive shaft. Refer to RAX-21, "Removal and Installation" .

● Remove sensor rotor from rear drive shaft.

INSTALLATION Front

Install front sensor rotor to front drive shaft. Refer to FAX-26, "Disassembly and Assembly (Models with AWD:

RH)" , FAX-30, "Disassembly and Assembly (LH)" .

Rear

Follow procedure below to install rear sensor rotor.

● Install rear sensor rotor to rear drive shaft. Refer to RAX-22, "Disassembly and Assembly" .

● Install rear drive shaft. Refer to RAX-21, "Removal and Installatio n " .

Revision: 2006 July 2006 X-Trail

BRC-94

Page 95

VDC/TCS/ABS CONTROL UNIT

[VDC/TCS/ABS]

VDC/TCS/ABS CONTROL UNIT PFP:47660

Removal and Installation AFS002P1

CAUTION:

Before servicing, disconnect battery terminals.

REMOVAL

1. Remove instrument lower panel, glove box and glove box cover. Refer to IP-10, "

2. Remove VDC/TCS/ABS control unit.

INSTRUMENT PANEL ASSEMBLY" .

INSTALLATION

Install in the reverse order of removal.

SFIA2359E

BRC

Revision: 2006 July 2006 X-Trail

BRC-95

Page 96

ACTUATOR

[VDC/TCS/ABS]

ACTUATOR PFP:47600 Removal and Installation AFS002QK

COMPONENTS

SFIA2403E

1. To rear LH cali per 2. To rear RH caliper 3. From master cylinder primary side

4. To fron t LH cal iper 5. From master cylinder secondary side

7. To fron t RH cal ip er 8. VDC relay box 9. Actuator bracket

10. Pressure sensor 11. Pin

6. VDC actuator

CAUTION:

● If the part number on the part number label (pasted on actuator u pper surface) is the s ame, VDC

actuator cannot be used on another vehicle. If it is used on another v ehicle, ABS warning lamp, SLIP indi cator lamp and VDC OFF indicator lamp may turn on or VDC/TCS/ABS may not operate normally. When replac ing VDC actuator, must use new service parts.

● Before servicing, disconnect battery terminals.

● To remove brake tube, u se a flare nut torque wrench to preven t flare nuts and brake tube from

being damaged. To install, use a flare nut torque wrench (commercial service tool ) and tighten to the specified torque.

● Do not apply excessive impact to VD C actuator, such as dropping it.

● Do not remove and install VDC actuator by holding harness.

Revision: 2006 July 2006 X-Trail

BRC-96

Page 97

ACTUATOR

[VDC/TCS/ABS]

REMOVAL

1. Remove cowl top cover. Refer to EI-19, "COWL TOP" .

2. Remove wiper motor assembly. Refer to WW-7, "

3. Remove cowl top box.

4. Disconnect VDC actuator connector.

5. Loosen brake tube flare nuts, then remove brake tubes from VDC actuator.

6. Loosen VDC actuator mounting bolts.

7. Remove VDC actuator from vehicle.

INSTALLATION

Install in the reverse order of removal.

CAUTION:

Be careful of the following when installing VDC actuator.

● Tighten the mounting bolts and nuts to the specified torque.

● After the work, bleed air from brake piping. Refer to BR-10, "Bleeding Brake System" .

● After installing body harness connector in the VDC actuator, make sure connector is securely

locked.

Removal and Installatio n of Wip er Mo to r and Lin k ag e" .

BRC

Revision: 2006 July 2006 X-Trail

BRC-97

Page 98

G SENSOR

[VDC/TCS/ABS]

G SENSOR PFP:47930 Removal and Installation AFS002P4

CAUTION:

● Do not drop or strike the yaw rate/side G sensor, because it is sensitive to impact.

● Do not use power tool, etc. Because yaw rate/side G sensor is weak for the impact.

REMOVAL

1. Remove center con s ole . R e fe r to IP-1 0, "INSTRUMENT PANEL

ASSEMBLY" .

2. Disconnect harness connector.

3. Remove mounting nuts and remove G sensor.

NOTE:

There is not need to detach the G sensor main body from a bracket.

SFIA2404E

INSTALLATION

Install in the reverse order of removal. Observe the precautions above.

Revision: 2006 July 2006 X-Trail

BRC-98

Page 99

STEERING ANGLE SENSOR

[VDC/TCS/ABS]

STEERING ANGLE SENSOR PFP:25554

Removal and Installation AFS002P5

REMOVAL

1. Remove spiral ca ble assembly. Refer toSRS-34, "SPIRAL CABLE" .

2. Remove steering angle sensor from spiral cable assembly.

SFIA1404E

INSTALLATION

Install in the reverse order of removal.

NOTE:

After work, make sure to adjust neutral position of steering angle sensor. Refer to BRC-43, "

St eering Angle Sensor Neutr al Position" .

Adjustment of

BRC

Revision: 2006 July 2006 X-Trail

BRC-99

Page 100

VDC OFF SWITCH

[VDC/TCS/ABS]

VDC OFF SWITCH PFP:25145 Removal and Installation AFS002QH

REMOVAL

1. Remove the instrument driver lower panel. Refer to IP-13,

"Instrument Dr iver Lower Panel" .

2. Push the VDC OFF switch's pawls and remove the switch from the instrument driver lower panel.

SFIA2482E

INSTALLATION

Installat ion is the reverse order of removal.

Revision: 2006 July 2006 X-Trail

BRC-100