Nissan XTrail T30 2005 User Manual

F BRAKES

SECTION BRC

BRAKE CONTROL SYSTEM

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C

D

CONTENTS

E

ABS
PRECAUTIONS .........................................................	4
Precautions for Supplemental Restraint 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
Fail-Safe Function ...................................................	6
ABS, EBD .............................................................	6
Hydraulic Circuit Diagram .......................................	7
CAN COMMUNICATION ...........................................	8
System Description .................................................	8
TROUBLE DIAGNOSIS .............................................	9
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ......................................................	9
INTRODUCTION ..................................................	9
DIAGNOSIS FLOW CHART ..............................	10
ASKING COMPLAINTS ......................................	11
EXAMPLE OF DIAGNOSIS SHEET ...................	11
Component Parts Location ....................................	12
Schematic .............................................................	13
Wiring Diagram .....................................................	14
Control Unit Input/Output Signal Standard ............	18
REFERENCE VALUE FROM CONSULT-II ........	18
CONSULT-II Functions ..........................................	19
CONSULT-II MAIN FUNCTION ..........................	19
CONSULT-IIBASICOPERATIONPROCEDURE
... 19
Self-Diagnosis .......................................................	19
OPERATION PROCEDURE ..............................	19
ERASE MEMORY ..............................................	20

DISPLAY ITEM LIST ..........................................	20
Data Monitor ..........................................................	21
OPERATION PROCEDURE ...............................	21
DISPLAY ITEM LIST ..........................................	22
Active Test .............................................................	23
OPERATION PROCEDURE ...............................	23
SOLENOID VALVE .............................................	23
ABS MONITOR ..................................................	24
For Fast and Accurate Diagnosis ..........................	24
PRECAUTIONS FOR DIAGNOSIS ....................	24
Basic Inspection ....................................................	25
BASIC INSPECTION 1: BRAKE FLUID LEVEL,
LEAKAGE AND BRAKE PAD .............................	25
BASIC INSPECTION 2: POWER SUPPLY CIR-
CUIT TERMINAL LOOSENESS AND BATTERY...	25
BASIC INSPECTION 3: INSPECTION OF ABS
WARNING LAMP ...............................................	25
Inspection 1: Wheel Sensor Circuit ........................	26
INSPECTION PROCEDURE .............................	26
Inspection 2: ABS Actuator and Electric Unit (Con-
trol Unit) .................................................................	28
Inspection 3: ABS Actuator and Electric Unit (Con-
trol Unit) Power Supply and Ground Circuit ...........	28
Inspection 4: ABS Actuator Relay or ABS Motor
Relay Power Circuit ...............................................	29
Inspection 5: G Sensor Circuit (Only AWD Models)...	30
Inspection 6: CAN Communication Circuit ............	32
Component Inspection ...........................................	33
PARKING BRAKE SWITCH ...............................	33
BRAKE FLUID LEVEL SWITCH ........................	33
Symptom 1: Excessive ABS Function Operation
Frequency ..............................................................	33
Symptom 2: Unexpected Pedal Reaction ..............	34
Symptom 3: The Stopping Distance Is Long .........	34
Symptom 4: ABS Function Does Not Operate ......	35
Symptom 5: Pedal Vibration or ABS Operation
Sound Occurs ........................................................	35
Symptom 6: ABS Warning Lamp Indication Is Not
Normal ...................................................................	35

Revision: 2005 March

BRC-1

2005 X-Trail

BRC

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WHEEL SENSORS ..................................................	36
Removal and Installation .......................................	36
COMPONENTS ..................................................	36
REMOVAL ..........................................................	36
INSTALLATION ...................................................	36
SENSOR ROTOR .....................................................	37
Removal and Installation (2WD Model) .................	37
REMOVAL ..........................................................	37
INSTALLATION ...................................................	37
Removal and Installation (AWD Model) .................	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
Fail-Safe Function .................................................	45
ABS, EBD, ABLS ................................................	45
VDC/TCS ............................................................	46
Hydraulic Circuit Diagram ......................................	46
CAN COMMUNICATION ..........................................	47
System Description ................................................	47
TROUBLE DIAGNOSIS ...........................................	48
How to Perform Trouble Diagnosis For Quick and
Accurate Repair .....................................................	48
INTRODUCTION ................................................	48
DIAGNOSIS FLOW CHART ...............................	49
ASKING COMPLAINTS ......................................	50

EXAMPLE OF DIAGNOSIS SHEET ...................		50
Component Parts Location ....................................		51
Schematic ..............................................................		52
Wiring Diagram — VDC — ..................................	...53
Control Unit Input/Output Signal Standard ..............		59
REFERENCE VALUE FROM CONSULT-II .........		59
CONSULT-II Functions ..........................................		61
CONSULT-II MAIN FUNCTION ..........................		61
CONSULT-IIBASICOPERATIONPROCEDURE
	...62
Self-Diagnosis ........................................................		62
OPERATION PROCEDURE ...............................		62
ERASE MEMORY ...............................................		63
DISPLAY ITEM LIST ...........................................		63
Data Monitor ..........................................................		65
OPERATION PROCEDURE ...............................		65
DISPLAY ITEM LIST ...........................................		65
Active Test ..............................................................		67
OPERATION PROCEDURE ...............................		67
SOLENOID VALVE .............................................		68
ABS MOTOR ......................................................		68
For Fast and Accurate Diagnosis ...........................		69
PRECAUTIONS FOR DIAGNOSIS ....................		69
Basic Inspection .....................................................		70
BASIC INSPECTION 1: BRAKE FLUID LEVEL,
LEAKAGE AND BRAKE PAD .............................		70
BASIC INSPECTION 2: POWER SUPPLY CIR-
CUIT TERMINAL LOOSENESS AND BATTERY...		70
BASIC INSPECTION 3: ABS WARNING LAMP,
BRAKEWARNINGLAMP,VDCOFFINDICATOR
LAMP, AND SLIP INDICATOR LAMP .................		70
Inspection 1: Wheel Sensor Circuit ........................		71
INSPECTION PROCEDURE ..............................		71
Inspection 2: Engine System .................................		73
Inspection 3: VDC/TCS/ABS Control Unit Circuit ...		73
Inspection 4: Pressure Sensor Circuit ....................		73
Inspection 5: Steering Angle Sensor Circuit ...........		75
Inspection 6: Yaw Rate/Side G Sensor Circuit .......		77
Inspection 7: Solenoid and VDC Switching Valve
Circuit .....................................................................		79
Inspection8:ActuatorMotorandMotorRelayCircuit
	...81
Inspection 9: Actuator Relay Circuit .......................		83
Inspection 10: Stop Lamp Switch Circuit ................		85
Inspection 11: VDC/TCS/ABS Control Unit Power
And Ground Circuit ................................................		86
Inspection 12: Park/Neutral Position (PNP) Switch
System (Only A/T Model) .......................................		87
Inspection 13: Brake Fluid Level Switch Circuit .....		88
Inspection 14: CAN Communication Circuit ...........		89
Component Inspection ...........................................		89
VDC OFF SWITCH .............................................		89
PARKING BRAKE SWITCH ................................		90
BRAKE FLUID LEVEL SWITCH .........................		90
MOTOR RELAY AND ACTUATOR RELAY ........		90
VDC ACTUATOR ................................................		91
Symptom 1: Excessive ABS Function Operation
Frequency ..............................................................		91
Symptom 2: Unexpected Pedal Reaction ..............		92

Revision: 2005 March

BRC-2

2005 X-Trail

Symptom 3: The Stopping Distance Is Long .........	92
Symptom 4: ABS Function Does Not Operate ......	93
Symptom 5: Pedal Vibration or ABS Operation
Sound Occurs .......................................................	93
Symptom 6: Vehicle Jerks During VDC/TCS/ABS
Control ...................................................................	93
Symptom 7: ABS Warning Lamp Indication Is Not
Normal ...................................................................	94
Symptom 8: Slip Indicator Lamp Indication Is Not
Normal ...................................................................	94
Symptom 9: VDC OFF Indicator Lamp Indication Is
Not Normal ............................................................	95
Symptom 10:Brake WarningLampIndicationIsNot
Normal ...................................................................	95
WHEEL SENSORS ..................................................	96
Removal and Installation .......................................	96
COMPONENTS .................................................	96
REMOVAL ..........................................................	96
INSTALLATION ..................................................	96
SENSOR ROTOR ....................................................	97
Removal and Installation .......................................	97
REMOVAL ..........................................................	97
INSTALLATION ..................................................	97

VDC/TCS/ABS CONTROL UNIT	............................. 98
Removal and Installation .......................................	98
REMOVAL ..........................................................	98
INSTALLATION ..................................................	98
ACTUATOR ..............................................................	99
Removal and Installation .......................................	99
COMPONENTS ..................................................	99
REMOVAL ........................................................	100
INSTALLATION ................................................	100
G SENSOR .............................................................	101
Removal and Installation .....................................	101
REMOVAL ........................................................	101
INSTALLATION ................................................	101
STEERING ANGLE SENSOR ...............................	102
Removal and Installation .....................................	102
REMOVAL ........................................................	102
INSTALLATION ................................................	102
VDC OFF SWITCH .................................................	103
Removal and Installation .....................................	103
REMOVAL ........................................................	103
INSTALLATION ................................................	103

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Revision: 2005 March

BRC-3

2005 X-Trail

	PRECAUTIONS
	[ABS]
PRECAUTIONS	PFP:00001

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” AFS002PO

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.

WARNING:

●To avoid rendering the SRS inoperative, which could increase the risk of personal 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, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS section.

●Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Precautions for Brake System

AFS002LO

●Recommended fluid is brake fluid “DOT 3”.

●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 gasoline 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 safety part. If a brake fluid leak 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 connectors of ABS actuator and electric unit (control unit) or battery negative terminal.

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

WARNING:

SBR686C

Clean brakes with a vacuum dust collector to minimize risk of health hazard from powder caused by friction.

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 operation check.

●When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (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 leaks.

●If tire size and type are used in an improper combination, 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 stereo, CD player, etc.) have been installed, check for incidents such as harness pinches, open circuits, and improper wiring.

Revision: 2005 March

BRC-4

2005 X-Trail

		PREPARATION
			[ABS]
PREPARATION			PFP:00002			A
Commercial Service Tools
			AFS002PB
	Tool name		Description
						B
	1.Flare nut crowfoot
						C
	a: 10 mm (0.39 in)		Removing and installing each brake piping
	2.Torque wrench
		S-NT360				D
						E
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Revision: 2005 March

BRC-5

2005 X-Trail

	SYSTEM DESCRIPTION
	[ABS]
SYSTEM DESCRIPTION	PFP:00000
System Diagram	AFS002LR

Functions

ABS

SFIA2390E

AFS002P6

●The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also improved for avoiding obstacles.

●Electrical System Diagnosis by CONSULT-II is available.

EBD

●Electronic Brake Distributor is a function that detects subtle slippages between front and rear wheels during 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 available.

Operation That Is Not “System Error”

AFS002P7

ABS

●When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating 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 than that of vehicles without ABS when vehicle drives on rough, gravel, or snow-covered (fresh, deep snow) roads.

Fail-Safe Function

AFS002LU

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, only EBD is activated and condition of vehicle is same condition of vehicles without ABS function.

NOTE:

In step 1 shown above, self-diagnosis when ignition switch is turned ON and when vehicle starts at initial time is performed. ABS self-diagnosis 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.

Revision: 2005 March

BRC-6

2005 X-Trail

SYSTEM DESCRIPTION

[ABS]

Hydraulic Circuit Diagram

AFS002LV

SFIA2479E

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Revision: 2005 March

BRC-7

2005 X-Trail

	CAN COMMUNICATION
	[ABS]
CAN COMMUNICATION	PFP:23710
System Description	AFS002PX

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 operation (not independent). In CAN communication, control units are connected with 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. Refer to LAN-16, "CAN Communication Unit" .

Revision: 2005 March

BRC-8

2005 X-Trail

TROUBLE DIAGNOSIS

	[ABS]
TROUBLE DIAGNOSIS	PFP:00004
How to Perform Trouble Diagnosis for Quick and Accurate Repair	AFS002LX
INTRODUCTION

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

●It is also important to clarify customer complaints before inspection.

First of all, reproduce symptom, 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 assume “maybe customer means...” or “maybe customer mentioned this symptom”.

EFJ0028D

●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 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 malfunction has actually been eliminated.

●After diagnosis, make sure to perform “erase memory”. Refer to

BRC-20, "ERASE MEMORY" .	SEF233G

●For an intermittent malfunction, move harness or harness connector by hand to check poor contact or false open circuit.

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

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Revision: 2005 March

BRC-9

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

DIAGNOSIS FLOW CHART

SFIA0953E

Revision: 2005 March

BRC-10

2005 X-Trail

TROUBLE DIAGNOSIS

ASKING COMPLAINTS

●Complaints vary depending on the person. It is important to clarify the customer's actual remarks.

●Ask the customer about what symptoms are present and under what conditions. Use the information to reproduce the symptom while driving.

●It is also important to use diagnosis sheet so as not to miss vital information.

EXAMPLE OF DIAGNOSIS SHEET

[ABS]

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LFIA0176E

Revision: 2005 March

BRC-11

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Component Parts Location

AFS002LY

SFIA2391E

Revision: 2005 March

BRC-12

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Schematic

AFS002LZ

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TFWB0019E

Revision: 2005 March

BRC-13

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Wiring Diagram

AFS002M0

TFWB0020E

Revision: 2005 March

BRC-14

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

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TFWB0003E

Revision: 2005 March

BRC-15

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

TFWB0021E

Revision: 2005 March

BRC-16

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

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Revision: 2005 March

BRC-17

2005 X-Trail

TROUBLE DIAGNOSIS

	[ABS]
Control Unit Input/Output Signal Standard	AFS002M1
REFERENCE VALUE FROM CONSULT-II

CAUTION:

The display shows the control unit calculation data, so a normal value might be displayed even in the event the output circuit (harness) is open or short - circulated.

		Data monitor
						Reference: Inspection
Data monitor item	Display item			Reference values
						item
		Condition		in normal opera-
				tion
FR LH SENSOR	Wheel speed calcu-	Vehicle stopped		0 [km/h]
				Nearly matches		BRC-26, "Inspection 1:
FR RH SENSOR	lated using signals
				the speedometer
RR LH SENSOR	from all four wheel	Vehicle running (Note 1)				Wheel Sensor Circuit"
				display (±	10 % or
RR RH SENSOR	sensors
				less)
		When vehicle is stopped on		OFF
		level ground				BRC-30, "Inspection 5: G
DECEL G-SEN 1	Fore-and-aft gravity
						Sensor Circuit (Only
		When G sensor is tilted toward
DECEL G-SEN 2	detected by G sensor
						AWD Models)"
		the front with G sensor mount-		ON
		ing nuts removed
		When the actuator solenoid		ON		BRC-29, "Inspection 4:
		operates or during a fail-safe
ABS IN SOL	Operation status of all					ABS Actuator Relay or
		When the actuator relay oper-
ABS OUT SOL	solenoid valve					ABS Motor Relay Power
		ates and the actuator solenoid		OFF
						Circuit"
		does not operate
STOP LAMP SW	Brake pedal operation	Brake pedal depressed		ON		Stop lamp switch circuit
	status
		Brake pedal not depressed		OFF
		When the motor relay and		ON
	Motor and motor relay	motor are operating
MOTOR RELAY
	operation status
		When the motor relay and		OFF		BRC-29, "Inspection 4:
		motor are not operating
						ABS Actuator Relay or
						ABS Motor Relay Power
		When the actuator relay is		OFF
						Circuit"
	Actuator relay opera-	operating
ACTUATOR RELAY
	tion status
		When the actuator relay is not		ON
		operating
		When ABS warning lamp is		ON		BRC-25, "BASIC
		ON
	ABS warning lamp on					INSPECTION 3:
ABS WARN LAMP
	condition (Note 2)					INSPECTION OF ABS
		When ABS warning lamp is		OFF
						WARNING LAMP"
		OFF
	Battery voltage sup-					BRC-28, "Inspection 3:
						ABS Actuator and Elec-
	plied to ABS actuator
BATTERY VOLT		Ignition switch ON		10 - 16 V		tric Unit (Control Unit)
	and electric unit (con-
						Power Supply and
	trol unit)
						Ground Circuit"
		EBD active		ON
EBD SIGNAL	EBD operation	ABS active
ABS SIGNAL	ABS operation
		EBD not active		OFF
		ABS not active				EBD system
						ABS system
		EBD Fail		ON
EBD FAIL SIG	System fail signal sta-	ABS Fail
ABS FAIL SIG	tus
		EBD normal		OFF
		ABS normal

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 error is detected.

OFF: After the ignition switch is turned ON (when system is normal).

Revision: 2005 March

BRC-18

2005 X-Trail

	TROUBLE DIAGNOSIS
	[ABS]
CONSULT-II Functions	AFS002M2
CONSULT-II MAIN FUNCTION		A

In a diagnosis function (main function), there are "SELF-DIAGNOSTIC RESULTS", “DATA MONITOR”, "CAN DIAG SUPPORT MNTR", “ACTIVE TEST”, “FUNCTION TEST”, “ECU PART NUMBER”.

	Diagnostic	Function	Reference
	test mode
	SELF-DIAG-
	NOSTIC	Self-diagnostic results can be read and erased quickly.	BRC-19, "Self-Diagnosis"
	RESULTS
	DATA MONI-	Input/Output data in the ABS actuator and electric unit (control unit) can be read.	BRC-21, "Data Monitor"
	TOR
	CAN DIAG		LAN-13, "CAN Diagnostic
	SUPPORT	The result of transmit/receive diagnostic of CAN communication can be read.
			Support Monitor"
	MNTR
		Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the
	ACTIVE TEST	ABS actuator and electric unit (control unit) and also shifts some parameters in a	BRC-23, "Active Test"
		specified range.
			Separate volume
	FUNCTION	Performed by CONSULT-II instead of a technician to determine whether each sys-	“CONSULT-II OPERATION
	TEST	tem is “OK” or “NG”.	MANUAL (FUNCTION
			TEST)”
	ECU PART	ABS actuator and electric unit (control unit) part number can be read.	—
	NUMBER

CONSULT-II BASIC OPERATION PROCEDURE

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

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

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	SFIA2435E
Self-Diagnosis	AFS002PE
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 the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”, “SELFDIAG RESULTS” in order on the CONSULT-II screen.

Revision: 2005 March

BRC-19

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

CAUTION:

If “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on the ignition switch, “ABS” might not be displayed in the System Selection screen. In this case, repeat the operation from step 1.

6.The self-diagnostic results are displayed. (Touch “PRINT” to print out self-diagnostic results, if necessary.) ● Check ABS warning lamp if “NO FAILURE” is displayed.

7.Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning component. Refer to BRC-20, "DISPLAY ITEM LIST" .

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

CAUTION:

When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp will not turn off even when the system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approximately 1 minute.

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 self-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-circuited.
		Or when the sensor power voltage is outside the standard. When
	FR LH SENSOR – 2	the distance between the wheel sensor and sensor rotor is too
		large and the sensor pulse cannot be recognized by the control
		unit.
		When the circuit in the rear RH wheel sensor is short-circuited.	BRC-26, "Inspection 1:
		Or when the sensor power voltage is outside the standard. When
	RR RH SENSOR – 2	the distance between the wheel sensor and sensor rotor is too	Wheel Sensor Circuit"
		large and the sensor pulse cannot be recognized by the control	(Note 1)
		unit.
		When the circuit in the front RH wheel sensor is short-circuited.
		Or when the sensor power voltage is outside the standard. When
	FR RH SENSOR – 2	the distance between the wheel sensor and sensor rotor is too
		large and the sensor pulse cannot be recognized by the 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
	RR LH SENSOR – 2	the distance between the wheel sensor and sensor rotor is too
		large and the sensor pulse cannot be recognized by the control
		unit.
			BRC-29, "Inspection 4:
	MAIN RELAY	When the control unit detects an error in the actuator relay circuit.	ABS Actuator Relay or
			ABS Motor Relay Power
			Circuit"

Revision: 2005 March

BRC-20

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

	Diagnostic item	Malfunction is detected when...	Check circuit
	FR LH IN ABS SOL	When the control unit detects an error in the front left inlet sole-
		noid circuit.
	FR LH OUT ABS SOL	When the control unit detects an error in the front left outlet sole-
		noid circuit.
	RR RH IN ABS SOL	When the control unit detects an error in the rear right inlet sole-
		noid circuit.
	RR RH OUT ABS SOL	When the control unit detects an error in the rear right outlet sole-	BRC-29, "Inspection 4:
		noid circuit.
			ABS Actuator Relay or
			ABS Motor Relay Power
	FR RH IN ABS SOL	When the control unit detects an error in the front right inlet sole-
			Circuit"
		noid circuit.
	FR RH OUT ABS SOL	When the control unit detects an error in the front right outlet
		solenoid circuit.
	RR LH IN ABS SOL	When the control unit detects an error in the rear left inlet sole-
		noid circuit.
	RR LH OUT ABS SOL	When the control unit detects an error in the rear left outlet sole-
		noid circuit.
			BRC-28, "Inspection 3:
		When the ABS actuator and electric unit (control unit)	ABS Actuator and Elec-
	LOW POWER VOLTAGE		tric Unit (Control Unit)
		power voltage is lower than normal.
			Power Supply and
			Ground Circuit"
		When there is an internal error in the ABS actuator and electric	BRC-28, "Inspection 2:
	ABS CONTROLLER		ABS Actuator and Elec-
		unit (control unit).
			tric Unit (Control Unit)"
	CAN COMM CIRCUIT	When there is an error in the CAN communication circuit.	BRC-32, "Inspection 6:
			CAN Communication
			Circuit" (Note 2)
			BRC-29, "Inspection 4:
	PUMP MOTOR	During actuator motor operation with ON, when actuator motor	ABS Actuator Relay or
		turns OFF or when control line for actuator motor relay is open.	ABS Motor Relay Power
			Circuit"
		G sensor is malfunctioning, or signal line of G sensor is open or	BRC-30, "Inspection 5:
	G SENSOR (Only AWD model)		G Sensor Circuit (Only
		shorted.
			AWD Models)"

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 while driving vehicle at 30 km/h (19 MPH) or more for approximately 1 minute according to self-diagnosis procedure. In addition, if wheel sensor 2 is displayed for wheels, check wheel sensor circuit and also check control unit power voltage.

Note 2: When errors are detected in several systems, including CAN communication circuit [U1000], troubleshoot CAN communication circuit. Refer to BRC-8, "CAN COMMUNICATION" .

Data Monitor

AFS002PF

OPERATION PROCEDURE

A

B

C

D

E

BRC

G

H

I

J

K

L

M

1.Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.

CAUTION:

When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat the operation from step 1.

2.At the monitor item selection screen, touch one of the items “ECU INPUT SIGNALS”, “MAIN SIGNALS” or. “SELECTION FROM MENU”.

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

Revision: 2005 March

BRC-21

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

DISPLAY ITEM LIST

		SELECT MONITOR ITEM
	Data monitor item (Unit)				Remarks
		ECU INPUT SIG-	MAIN SIGNALS	SELECTION
		NALS		FROM MENU
	FR LH SENSOR	×	×	×	Wheel speed calculated by front LH wheel
	[km/h]				sensor signal is displayed.
	FR RH SENSOR	×	×	×	Wheel speed calculated by front RH wheel
	[km/h]				sensor signal is displayed.
	RR LH SENSOR	×	×	×	Wheel speed calculated by rear LH wheel
	[km/h]				sensor signal is displayed.
	RR RH SENSOR	×	×	×	Wheel speed calculated by rear RH wheel
	[km/h]				sensor signal is displayed.
	DECEL G-SEN 1
	(ON/OFF)	×	×	×	G sensor 1 (ON/OFF) status is displayed.
	(Only AWD model)
	DECEL G-SEN 2
	(ON/OFF)	×	×	×	G sensor 2 (ON/OFF) status is displayed.
	(Only AWD model)
	FR LH IN SOL	–	×	×	Front left inlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	FR LH OUT SOL	–	×	×	Front left outlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	RR RH IN SOL	–	×	×	Rear right inlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	RR RH OUT SOL	–	×	×	Rear right outlet ABS solenoid valve (ON/
	(ON/OFF)				OFF) status is displayed.
	FR RH IN SOL	–	×	×	Front right inlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	FR RH OUT SOL	–	×	×	Front right outlet ABS solenoid valve (ON/
	(ON/OFF)				OFF) status is displayed.
	RR LH IN SOL	–	×	×	Rear left inlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	RR LH OUT SOL	–	×	×	Rear left outlet ABS solenoid valve (ON/OFF)
	(ON/OFF)				status is displayed.
	STOP LAMP SW	×	×	×	Stop lamp switch (ON/OFF) status is dis-
	(ON/OFF)				played.
	MOTOR RELAY	–	×	×	ABS motor relay (ON/OFF) condition is dis-
	(ON/OFF)				played.
	ACTUATOR RLY	–	×	×	ABS actuator relay (ON/OFF) status is dis-
	(ON/OFF)				played.
	ABS WARN LAMP	–	×	×	ABS warning lamp (ON/OFF) status is dis-
	(ON/OFF)				played.
	BATTERY VOLT	×	×	×	The voltage supplied to the ABS actuator and
	(V )				electric unit (control unit) is displayed.
	EBD SIGNAL	–	–	×	EBD operation (ON/OFF) status is displayed.
	(ON/OFF)
	ABS SIGNAL	–	–	×	ABS operation (ON/OFF) status is displayed.
	(ON/OFF)
	EBD FAIL SIG	–	–	×	EBD fail-safe signal (ON/OFF) status is dis-
	(ON/OFF)				played.
	ABS FAIL SIG	–	–	×	ABS fail-safe signal (ON/OFF) status is dis-
	(ON/OFF)				played.

× : Applicable

–: Not applicable

Revision: 2005 March

BRC-22

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Active Test

AFS002PG

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.

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.

CAUTION:

When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat the operation from step 1.

A

B

C

D

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:

		E
		BRC
		G
SFIA2085E		H
		I
		J

●When active test is performed while depressing pedal, pedal depression amount will change, but this 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.

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 operates as shown in Solenoid Valve Operation Chart. Refer to “Solenoid Valve Operation Chart”.

SFIA0678E

K

L

M

Revision: 2005 March

BRC-23

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Solenoid Valve Operation Chart

Operation				ABS solenoid valve
			UP	KEEP	DOWN
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

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 RELAY	ON	OFF
ACTUATOR RLY	ON	ON
				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 toGI-4, "Gen- eral Precautions" .

●Always erase memory after completing trouble diagnosis. Refer to BRC-20, "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 harnesses, harness connectors, and terminals by hand to make sure all connections are solid 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 below may occur, but the system is operating normally.

	Symptom	Symptom description	Result
		This is the operation noise of the motor in the actuator, and there may
	Motor operation noise	be a slight sound during ABS operation.	Normal
		Just after the engine starts, the motor operating noise may be heard.
		This is a normal status of the system operation check.
	System operation check	When engine starts, “click” noise may be heard from engine room. This	Normal
	noise	is normal status of system operation check.
		When driving on roads with a low coefficient of friction, such as snowy
	ABS operation (Longer stop-	roads or gravel roads, the stopping distance is sometimes longer for	Normal
	ping distance)	vehicles equipped with ABS. Therefore, when driving on such roads,
		drive at a sufficiently reduced speed to be safe.

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 (When system is normal)	−
ABS error	×
EBD error	×

Revision: 2005 March

BRC-24

2005 X-Trail

TROUBLE DIAGNOSIS

	[ABS]
Basic Inspection	AFS002M5
BASIC INSPECTION 1: BRAKE FLUID LEVEL, LEAKAGE AND BRAKE PAD		A

1.Check fluid level 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 oozing 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.

●	If the flare nuts at the connections and the threads of the actuator are damaged, replace the damaged
	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. If there is still leakage or oozing, replace the damaged part.
●	If leakage or oozing is detected on actuator body, wipe with a clean cloth and check again. If there is
	still leakage or oozing, replace ABS actuator and electric unit (control unit).
	CAUTION:
	ABS actuator and electric unit (control unit) cannot be disassembled.

B

C

D

E

3.Check brake disc rotor and pads. Front disc rotor: BR-30, "DISC ROTOR INSPECTION" , Front pad: BR-

25, "PAD WEAR INSPECTION" , Rear disk rotor: BR-35, "DISC ROTOR INSPECTION" , Rear pad: BR- BRC 31, "PAD WEAR INSPECTION" .

BASIC INSPECTION 2: POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY

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

BASIC INSPECTION 3: 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-32, "Inspection 6: CAN Communication

Circuit" . Check ABS warning lamp if there is no malfunction in CAN communication circuit. Refer to BRC35, "Symptom 6: ABS Warning 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-diagno-
	sis of the ABS actuator and electric unit (control unit).
4.	Always erase the self-diagnostic results after completing self-diagnosis. Refer to BRC-20, "ERASE MEM-
	ORY" .

H

I

J

K

L

M

Revision: 2005 March

BRC-25

2005 X-Trail

TROUBLE DIAGNOSIS

	[ABS]
Inspection 1: Wheel Sensor Circuit	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, wear and size.

Are air pressure, 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. Refer to BRC-37, "SENSOR ROTOR" .

●Check wheel sensor for damage, disconnection or looseness. Refer to BRC-36, "WHEEL SENSORS" . OK or NG

OK	>> GO TO 3.
NG	>> Repair wheel sensor mount or replace 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

RRRH 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

1.Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector 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, damaged, open or shorted.
NO	>> GO TO 5.

Revision: 2005 March

BRC-26

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

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 wheel house is moved.)

SFIA2015E

			Power supply circuit		Signal circuit		Ground circuit
			ABS actuator		ABS actuator
			and electric	Wheel sensor	and electric	Wheel sensor	ABS actuator and elec-
			unit (control		unit (control		tric unit (control unit)
		Wheel		(harness con-		(harness con-			Ground
			unit)		unit)		harness connector E69
				nector)		nector)
			harness con-		harness con-		(signal)
			nector E69		nector E69
	Front RH (E17)		24 (W)	1 (W)	9 (B)	2 (B)	24 (W), 9 (B)
	Front LH (E59)		22 (L/W)	1 (L/W)	7 (L/Y)	2 (L/Y)	22 (L/W), 7 (L/Y)		—
	Rear RH(B130)		28 (B/W)	1 (B/W)	13 (L/R)	2 (L/R)	28 (B/W), 13 (L/R)
	Rear LH (B126)		26 (BR)	1 (BR)	11 (BR/W)	2 (BR/W)	26 (BR), 11 (BR/W)
		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

A

B

C

D

E

BRC

G

H

I

J

K

1.Replace wheel sensor that resulted in malfunction by self-diagnosis.

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

Is above displayed on self-diagnosis display?

OK	>> Wheel sensor has malfunction.
NG	>> ● 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”.

L

M

Revision: 2005 March

BRC-27

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

Inspection 2: ABS Actuator and Electric Unit (Control Unit)

AFS002M7

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

	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
Inspection 3: ABS Actuator and Electric Unit (Control Unit) Power Supply and
Ground Circuit			AFS002M8

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS

Check self-diagnostic results.

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 self-diagnosis again.

Is the result of self-diagnosis normal?

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

Revision: 2005 March

BRC-28

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

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

A

1.Turn ignition switch 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 elec-

Measure-

Measured

Signal

tric unit (control unit)

Ground

ment con-

value

harness connector E69

dition

Ignition

Battery voltage

—

switch

(Approx. 12 V)

Power

ON

29 (L)

supply

Ignition

—

switch

Approx. 0 V

OFF

ABS actuator and elec-

Measure-

Measured

Signal

tric unit (control unit)

Ground

ment con-

value

harness connector E69

dition

Ignition

Continuity

Ground

16 (B), 30 (B)

—

switch

should

OFF

exist.

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.

SFIA2087E

SFIA2089E

B

C

D

E

BRC

G

H

I

Inspection 4: ABS Actuator Relay or ABS Motor Relay Power Circuit		AFS002M9
INSPECTION PROCEDURE			J
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND
CIRCUIT			K
Check the self-diagnostic results.
			L
Self-diagnostic results

FR LH IN ABS SOL

FR LH OUT ABS SOL

M

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: 2005 March

BRC-29

2005 X-Trail

TROUBLE DIAGNOSIS

[ABS]

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 self-diagnosis again.

Is the result of self-diagnosis normal?

YES	>> Connector terminal contact is loose, damaged, 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 (L/W) and ground. For the ABS motor relay, measure voltage between the harness connector terminal 1 (Y) and ground.

ABS actuator and electric
unit (control unit) harness		Ground	Voltage
	connector E69
	1 (Y), 15 (L/W)	—	Battery voltage
			(Approx. 12 V)
					SFIA2110E
OK or NG
OK	>> GO TO 4.
NG	>> Circuit malfunction between the battery and ABS actuator and electric unit (control unit). Repair
	circuit.

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(B), 30(B) and ground.

ABS actuator and electric unit
	(control unit)	Ground	Continuity
	harness connector E69
	16 (B), 30 (B)	—	Yes
OK or NG
OK	>> Replace ABS actuator and electric unit (control unit).
NG	>> Open or short in harness. Repair or replace the harness,				SFIA2089E
	and perform self-diagnosis again.
Inspection 5: G Sensor Circuit (Only AWD 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: 2005 March

BRC-30

2005 X-Trail