Nissan MAXIMA A35 (2012) Service MANUAL – Body Control System

ELECTRICAL & POWER CONTROL

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SECTION LAN

CAN FUNDAMENTAL

PRECAUTION ...............................................

PRECAUTIONS ................................................... 5

Precautions for Trouble Diagnosis ............................5

Precautions for Harness Repair ................................5

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

CAN COMMUNICATION SYSTEM ..................... 6

System Description ...................................................6

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

CAN Communication Control Circuit .........................7

DIAG ON CAN ..................................................... 8

Description ................................................................8

System Diagram ........................................................8

TROUBLE DIAGNOSIS ...................................... 9

Condition of Error Detection ......................................9

Symptom When Error Occurs in CAN Communi-

cation System ............................................................

CAN Diagnosis with CONSULT ..............................12

Self-Diagnosis ......................................................... 12

CAN Diagnostic Support Monitor ............................12

How to Use CAN Communication Signal Chart ......14

BASIC INSPECTION ...................................15

DIAGNOSIS AND REPAIR WORKFLOW .........15

Trouble Diagnosis Flow Chart ................................. 15

Trouble Diagnosis Procedure .................................. 15

CAN

HOW TO USE THIS MANUAL .....................

HOW TO USE THIS SECTION ...........................20

Caution .................................................................... 20

Abbreviation List ...................................................... 20

PRECAUTION ..............................................21

CONTENTS

PRECAUTIONS .................................................21

Precaution for Supplemental Restraint System

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(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-

SIONER" .................................................................

Precautions for Trouble Diagnosis ..........................21

Precautions for Harness Repair ..............................21

BASIC INSPECTION ...................................23

DIAGNOSIS AND REPAIR WORKFLOW ........23

Interview Sheet ........................................................23

SYSTEM DESCRIPTION .............................24

CAN COMMUNICATION SYSTEM ...................24

CAN System Specification Chart .............................24

CAN Communication Signal Chart ..........................24

WIRING DIAGRAM ......................................28

CAN SYSTEM ...................................................28

Wiring Diagram ........................................................28

DTC/CIRCUIT DIAGNOSIS .........................36

CAN COMMUNICATION SYSTEM ...................36

Component Parts Location ......................................36

MALFUNCTION AREA CHART ........................37

Main Line .................................................................37

Branch Line .............................................................37

Short Circuit .............................................................37

MAIN LINE BETWEEN ADP AND DLC CIR-

CUIT ..................................................................

Diagnosis Procedure ...............................................38

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ..................................................................

Diagnosis Procedure ...............................................39

MAIN LINE BETWEEN HVAC AND ABS CIR-

CUIT ..................................................................

LAN SYSTEM

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LAN-1

Diagnosis Procedure .............................................. 40

MAIN LINE BETWEEN HVAC AND A-BAG

CIRCUIT .............................................................

Diagnosis Procedure .............................................. 41

ECM BRANCH LINE CIRCUIT .......................... 60

Diagnosis Procedure ............................................... 60

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BCM BRANCH LINE CIRCUIT .......................... 61

Diagnosis Procedure ............................................... 61

MAIN LINE BETWEEN A-BAG AND ABS

CIRCUIT .............................................................

Diagnosis Procedure .............................................. 42

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ECM BRANCH LINE CIRCUIT .......................... 43

Diagnosis Procedure .............................................. 43

ADP BRANCH LINE CIRCUIT .......................... 44

Diagnosis Procedure .............................................. 44

BCM BRANCH LINE CIRCUIT .......................... 45

Diagnosis Procedure .............................................. 45

DLC BRANCH LINE CIRCUIT ........................... 46

Diagnosis Procedure .............................................. 46

M&A BRANCH LINE CIRCUIT .......................... 47

Diagnosis Procedure .............................................. 47

AV BRANCH LINE CIRCUIT ............................. 48

Diagnosis Procedure .............................................. 48

HVAC BRANCH LINE CIRCUIT ........................ 49

Diagnosis Procedure .............................................. 49

STRG BRANCH LINE CIRCUIT ........................ 50

Diagnosis Procedure .............................................. 50

DLC BRANCH LINE CIRCUIT .......................... 62

Diagnosis Procedure ............................................... 62

M&A BRANCH LINE CIRCUIT .......................... 63

Diagnosis Procedure ............................................... 63

HVAC BRANCH LINE CIRCUIT ........................ 64

Diagnosis Procedure ............................................... 64

STRG BRANCH LINE CIRCUIT ........................ 65

Diagnosis Procedure ............................................... 65

A-BAG BRANCH LINE CIRCUIT ...................... 66

Diagnosis Procedure ............................................... 66

ABS BRANCH LINE CIRCUIT .......................... 67

Diagnosis Procedure ............................................... 67

TCM BRANCH LINE CIRCUIT .......................... 68

Diagnosis Procedure ............................................... 68

IPDM-E BRANCH LINE CIRCUIT ..................... 69

Diagnosis Procedure ............................................... 69

CAN COMMUNICATION CIRCUIT ................... 70

Diagnosis Procedure ............................................... 70

CAN SYSTEM (TYPE 2)

A-BAG BRANCH LINE CIRCUIT ...................... 51

Diagnosis Procedure .............................................. 51

ABS BRANCH LINE CIRCUIT .......................... 52

Diagnosis Procedure .............................................. 52

TCM BRANCH LINE CIRCUIT .......................... 53

Diagnosis Procedure .............................................. 53

IPDM-E BRANCH LINE CIRCUIT ..................... 54

Diagnosis Procedure .............................................. 54

CAN COMMUNICATION CIRCUIT .................... 55

Diagnosis Procedure .............................................. 55

CAN SYSTEM (TYPE 1)

DTC/CIRCUIT DIAGNOSIS .........................

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ...................................................................

Diagnosis Procedure .............................................. 57

MAIN LINE BETWEEN HVAC AND A-BAG

CIRCUIT .............................................................

Diagnosis Procedure .............................................. 58

MAIN LINE BETWEEN A-BAG AND ABS

CIRCUIT .............................................................

Diagnosis Procedure .............................................. 59

DTC/CIRCUIT DIAGNOSIS ........................ 72

MAIN LINE BETWEEN ADP AND DLC CIR-

CUIT ...................................................................

Diagnosis Procedure ............................................... 72

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ...................................................................

Diagnosis Procedure ............................................... 73

MAIN LINE BETWEEN HVAC AND A-BAG

CIRCUIT .............................................................

Diagnosis Procedure ............................................... 74

MAIN LINE BETWEEN A-BAG AND ABS

CIRCUIT .............................................................

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Diagnosis Procedure ............................................... 75

ECM BRANCH LINE CIRCUIT .......................... 76

Diagnosis Procedure ............................................... 76

ADP BRANCH LINE CIRCUIT .......................... 77

Diagnosis Procedure ............................................... 77

BCM BRANCH LINE CIRCUIT .......................... 78

Diagnosis Procedure ............................................... 78

DLC BRANCH LINE CIRCUIT .......................... 79

Diagnosis Procedure ............................................... 79

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LAN-2

M&A BRANCH LINE CIRCUIT ..........................80

Diagnosis Procedure ............................................... 80

ABS BRANCH LINE CIRCUIT ........................ 100

Diagnosis Procedure ............................................. 100

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HVAC BRANCH LINE CIRCUIT ........................81

Diagnosis Procedure ............................................... 81

STRG BRANCH LINE CIRCUIT .........................82

Diagnosis Procedure ............................................... 82

A-BAG BRANCH LINE CIRCUIT .......................83

Diagnosis Procedure ............................................... 83

ABS BRANCH LINE CIRCUIT ...........................84

Diagnosis Procedure ............................................... 84

TCM BRANCH LINE CIRCUIT ...........................85

Diagnosis Procedure ............................................... 85

IPDM-E BRANCH LINE CIRCUIT ......................86

Diagnosis Procedure ............................................... 86

CAN COMMUNICATION CIRCUIT ....................87

Diagnosis Procedure ............................................... 87

CAN SYSTEM (TYPE 3)

DTC/CIRCUIT DIAGNOSIS .........................89

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ....................................................................

Diagnosis Procedure ............................................... 89

MAIN LINE BETWEEN HVAC AND A-BAG

CIRCUIT .............................................................

Diagnosis Procedure ............................................... 90

MAIN LINE BETWEEN A-BAG AND ABS

CIRCUIT .............................................................

Diagnosis Procedure ............................................... 91

ECM BRANCH LINE CIRCUIT ...........................92

Diagnosis Procedure ............................................... 92

BCM BRANCH LINE CIRCUIT ..........................93

Diagnosis Procedure ............................................... 93

DLC BRANCH LINE CIRCUIT ...........................94

Diagnosis Procedure ............................................... 94

M&A BRANCH LINE CIRCUIT ..........................95

Diagnosis Procedure ............................................... 95

AV BRANCH LINE CIRCUIT ..............................96

Diagnosis Procedure ............................................... 96

HVAC BRANCH LINE CIRCUIT ........................97

Diagnosis Procedure ............................................... 97

STRG BRANCH LINE CIRCUIT .........................98

Diagnosis Procedure ............................................... 98

A-BAG BRANCH LINE CIRCUIT .......................99

Diagnosis Procedure ............................................... 99

TCM BRANCH LINE CIRCUIT ........................ 101

Diagnosis Procedure ............................................. 101

IPDM-E BRANCH LINE CIRCUIT ................... 102

Diagnosis Procedure ............................................. 102

CAN COMMUNICATION CIRCUIT ................. 103

Diagnosis Procedure ............................................. 103

CAN SYSTEM (TYPE 4)

DTC/CIRCUIT DIAGNOSIS ....................... 105

MAIN LINE BETWEEN ADP AND DLC CIR-

CUIT ................................................................

Diagnosis Procedure ............................................. 105

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ................................................................

Diagnosis Procedure ............................................. 106

MAIN LINE BETWEEN HVAC AND A-BAG

CIRCUIT ..........................................................

Diagnosis Procedure ............................................. 107

MAIN LINE BETWEEN A-BAG AND ABS

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CIRCUIT ..........................................................

Diagnosis Procedure ............................................. 108

ECM BRANCH LINE CIRCUIT ....................... 109

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Diagnosis Procedure ............................................. 109

ADP BRANCH LINE CIRCUIT ........................ 110

Diagnosis Procedure ............................................. 110

BCM BRANCH LINE CIRCUIT ....................... 111

Diagnosis Procedure ............................................. 111

DLC BRANCH LINE CIRCUIT ........................ 112

Diagnosis Procedure ............................................. 112

M&A BRANCH LINE CIRCUIT ....................... 113

Diagnosis Procedure ............................................. 113

AV BRANCH LINE CIRCUIT .......................... 114

Diagnosis Procedure ............................................. 114

HVAC BRANCH LINE CIRCUIT ..................... 115

Diagnosis Procedure ............................................. 115

STRG BRANCH LINE CIRCUIT ..................... 116

Diagnosis Procedure ............................................. 116

A-BAG BRANCH LINE CIRCUIT .................... 117

Diagnosis Procedure ............................................. 117

ABS BRANCH LINE CIRCUIT ........................ 118

Diagnosis Procedure ............................................. 118

TCM BRANCH LINE CIRCUIT ........................ 119

Diagnosis Procedure ............................................. 119

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LAN-3

IPDM-E BRANCH LINE CIRCUIT ................... 120

Diagnosis Procedure .............................................120

CAN COMMUNICATION CIRCUIT .................. 121

Diagnosis Procedure .............................................121

CAN SYSTEM (TYPE 5)

DTC/CIRCUIT DIAGNOSIS ........................123

MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT .................................................................

Diagnosis Procedure .............................................123

MAIN LINE BETWEEN HVAC AND ABS CIR-

CUIT .................................................................

Diagnosis Procedure .............................................124

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DTC/CIRCUIT DIAGNOSIS .......................

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MAIN LINE BETWEEN ADP AND DLC CIR-

CUIT ..................................................................

Diagnosis Procedure ............................................. 136

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MAIN LINE BETWEEN DLC AND HVAC CIR-

CUIT ..................................................................

Diagnosis Procedure ............................................. 137

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MAIN LINE BETWEEN HVAC AND ABS CIR-

CUIT ..................................................................

Diagnosis Procedure ............................................. 138

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ECM BRANCH LINE CIRCUIT .........................139

Diagnosis Procedure ............................................. 139

ECM BRANCH LINE CIRCUIT ........................ 125

Diagnosis Procedure .............................................125

BCM BRANCH LINE CIRCUIT ........................ 126

Diagnosis Procedure .............................................126

DLC BRANCH LINE CIRCUIT ......................... 127

Diagnosis Procedure .............................................127

M&A BRANCH LINE CIRCUIT ........................ 128

Diagnosis Procedure .............................................128

HVAC BRANCH LINE CIRCUIT ...................... 129

Diagnosis Procedure .............................................129

STRG BRANCH LINE CIRCUIT ...................... 130

Diagnosis Procedure .............................................130

ABS BRANCH LINE CIRCUIT ........................ 131

Diagnosis Procedure .............................................131

TCM BRANCH LINE CIRCUIT ........................ 132

Diagnosis Procedure .............................................132

IPDM-E BRANCH LINE CIRCUIT ................... 133

Diagnosis Procedure .............................................133

ADP BRANCH LINE CIRCUIT .........................140

Diagnosis Procedure ............................................. 140

BCM BRANCH LINE CIRCUIT .........................141

Diagnosis Procedure ............................................. 141

DLC BRANCH LINE CIRCUIT .........................142

Diagnosis Procedure ............................................. 142

M&A BRANCH LINE CIRCUIT .........................143

Diagnosis Procedure ............................................. 143

AV BRANCH LINE CIRCUIT ............................144

Diagnosis Procedure ............................................. 144

HVAC BRANCH LINE CIRCUIT .......................145

Diagnosis Procedure ............................................. 145

STRG BRANCH LINE CIRCUIT .......................146

Diagnosis Procedure ............................................. 146

ABS BRANCH LINE CIRCUIT .........................147

Diagnosis Procedure ............................................. 147

TCM BRANCH LINE CIRCUIT .........................148

Diagnosis Procedure ............................................. 148

CAN COMMUNICATION CIRCUIT .................. 134

Diagnosis Procedure .............................................134

CAN SYSTEM (TYPE 6)

Revision: August 2012 2012 Maxima

IPDM-E BRANCH LINE CIRCUIT .................... 149

Diagnosis Procedure ............................................. 149

CAN COMMUNICATION CIRCUIT ..................150

Diagnosis Procedure ............................................. 150

LAN-4

< PRECAUTION >

PRECAUTIONS

[CAN FUNDAMENTAL]

PRECAUTION

PRECAUTIONS

Precautions for Trouble Diagnosis INFOID:0000000007252594

CAUTION:

• Never apply 7.0 V or more to the measurement terminal.

• Use a tester with open terminal voltage of 7.0 V or less.

• Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when
checking the harness.

Precautions for Harness Repair INFOID:0000000007252595

• Solder the repaired area and wrap tape around the soldered area.

NOTE:

A fray of twisted lines must be within 110 mm (4.33 in).

SKIB8766E

• Bypass connection is never allowed at the repaired area.

NOTE:

Bypass connection may cause CAN communication error. The
spliced wire becomes separated and the characteristics of twisted
line are lost.

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• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica­tion line.

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SKIB8767E

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LAN-5

CAN COMMUNICATION SYSTEM

< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

SYSTEM DESCRIPTION

CAN COMMUNICATION SYSTEM

System Description INFOID:0000000007252596

• CAN communication is a multiplex communication system. This enables the system to transmit and receive
large quantities of data at high speed by connecting control units with two communication lines (CAN-H and
CAN-L).

• Control units on the CAN network transmit signals using the CAN communication control circuit. They
receive only necessary signals from other control units to operate various functions.

• CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

System Diagram INFOID:0000000007252597

SKIB8887E

Each control unit passes an electric current to the termination circuits when transmitting CAN communication
signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN
communication system transmits and receives CAN communication signals by the potential difference.

Component Description

Main line CAN communication line between splices

Branch line CAN communication line between splice and a control unit

Splice A point connecting a branch line with a main line

Termination circuit Refer to LAN-7, "CAN Communication Control Circuit"

.

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LAN-6

CAN COMMUNICATION SYSTEM

< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

CAN Communication Control Circuit INFOID:0000000007252598

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Component System description

CAN controller It controls CAN communication signal transmission and reception, error detection, etc.

Transceiver IC

Noise filter It eliminates noise of CAN communication signal.

Termination circuit
(Resistance of approx. 120 Ω)

*: These are the only control units wired with both ends of CAN communication system.

*

It converts digital signal into CAN communication signal, and CAN communication signal into digital
signal.

It produces potential difference.

SKIB8713E

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LAN-7

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DIAG ON CAN

< SYSTEM DESCRIPTION >

[CAN FUNDAMENTAL]

DIAG ON CAN

Description INFOID:0000000007252599

“Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1 and DDL2 communication
lines, between control units and diagnosis unit.

System Diagram INFOID:0000000007252600

Name Harness Description

DDL1

DDL2 K-LINE It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)

Diag on CAN

Tx
Rx

CAN-H
CAN-L

It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)

It is used for trouble diagnosis and control.

SKIB8714E

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LAN-8

< SYSTEM DESCRIPTION >

TROUBLE DIAGNOSIS

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSIS

Condition of Error Detection INFOID:0000000007252601

DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT if a
CAN communication signal is not transmitted or received between units for 2 seconds or more.

CAN COMMUNICATION SYSTEM ERROR

• CAN communication line open (CAN-H, CAN-L, or both)

• CAN communication line short (ground, between CAN communication lines, other harnesses)

• Error of CAN communication control circuit of the unit connected to CAN communication line

WHEN DTC OF CAN COMMUNICATION IS INDICATED EVEN THOUGH CAN COMMUNICATION SYSTEM IS NORMAL

• Removal/installation of parts: Error may be detected when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)

• Fuse blown out (removed): CAN communication of the unit may cease.

• Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).

• Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).

• Error may be detected if reprogramming is not completed normally.

CAUTION:

CAN communication system is normal if DTC of CAN communication is indicated on SELF-DIAG
RESULTS of CONSULT under the above conditions. Erase the memory of the self-diagnosis of each
unit.

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Symptom When Error Occurs in CAN Communication System INFOID:0000000007252602

In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communication line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.

ERROR EXAMPLE

NOTE:

• Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.

• Refer to LAN-20, "Abbreviation List"

Example: TCM branch line open circuit

for the unit abbreviation.

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SKIB8738E

Unit name Symptom

ECM Engine torque limiting is affected, and shift harshness increases.

BCM Reverse warning chime does not sound.

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LAN-9

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TROUBLE DIAGNOSIS

< SYSTEM DESCRIPTION >

Unit name Symptom

EPS control unit Normal operation.

Combination meter

ABS actuator and electric unit (control unit) Normal operation.

TCM No impact on operation.

IPDM E/R Normal operation.

Example: Data link connector branch line open circuit

• Shift position indicator and OD OFF indicator turn OFF.

• Warning lamps turn ON.

[CAN FUNDAMENTAL]

SKIB8739E

Unit name Symptom

ECM

BCM

EPS control unit

Combination meter

ABS actuator and electric unit (control unit)

TCM

IPDM E/R

Normal operation.

NOTE:

• When data link connector branch line is open, transmission and reception of CAN communication signals
are not affected. Therefore, no symptoms occur. However, be sure to repair malfunctioning circuit.

• The model (all units on CAN communication system are Diag on CAN) cannot perform CAN diagnosis with
CONSULT if the following error occurs. The error is judged by the symptom.

Error Difference of symptom

Data link connector branch line open circuit Normal operation.

CAN-H, CAN-L harness short-circuit

Most of the units which are connected to the CAN communication
system enter fail-safe mode or are deactivated.

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LAN-10

TROUBLE DIAGNOSIS

< SYSTEM DESCRIPTION >

Example: Main Line Between Data Link Connector and ABS Actuator and Electric Unit (Control Unit) Open Circuit

[CAN FUNDAMENTAL]

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Unit name Symptom

ECM Engine torque limiting is affected, and shift harshness increases.

• Reverse warning chime does not sound.

BCM

EPS control unit The steering effort increases.

Combination meter

ABS actuator and electric unit (control unit) Normal operation.

TCM No impact on operation.

IPDM E/R

• The front wiper moves under continuous operation mode even though the front wip­er switch being in the intermittent position.

• The shift position indicator and OD OFF indicator turn OFF.

• The speedometer is inoperative.

• The odo/trip meter stops.

When the ignition switch is ON,

• The headlamps (Lo) turn ON.

• The cooling fan continues to rotate.

Example: CAN-H, CAN-L Harness Short Circuit

SKIB8740E

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LAN-11

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TROUBLE DIAGNOSIS

< SYSTEM DESCRIPTION >

Unit name Symptom

ECM

BCM

EPS control unit The steering effort increases.

Combination meter

ABS actuator and electric unit (control unit) Normal operation.

TCM No impact on operation.

IPDM E/R

• Engine torque limiting is affected, and shift harshness increases.

• Engine speed drops.

• Reverse warning chime does not sound.

• The front wiper moves under continuous operation mode even though the front
wiper switch being in the intermittent position.

• The room lamp does not turn ON.

• The engine does not start (if an error or malfunction occurs while turning the igni­tion switch OFF.)

• The steering lock does not release (if an error or malfunction occurs while turning
the ignition switch OFF.)

• The tachometer and the speedometer do not move.

• Warning lamps turn ON.

• Indicator lamps do not turn ON.

When the ignition switch is ON,

• The headlamps (Lo) turn ON.

• The cooling fan continues to rotate.

[CAN FUNDAMENTAL]

CAN Diagnosis with CONSULT

INFOID:0000000007252603

CAN diagnosis on CONSULT extracts the root cause by receiving the following information.

• Response to the system call

• Control unit diagnosis information

• Self-diagnosis

• CAN diagnostic support monitor

Self-Diagnosis INFOID:0000000007252604

If communication signals cannot be transmitted or received among units communicating via CAN communica­tion line, CAN communication-related DTC is displayed on the CONSULT “Self Diagnostic Result” screen.

NOTE:

The following table shows examples of CAN communication-related DTC. For other DTC, refer to the applica­ble sections.

DTC

U1000 CAN COMM CIRCUIT

U1001 CAN COMM CIRCUIT

U1002 SYSTEM COMM

U1010 CONTROL UNIT(CAN)

Self-diagnosis item

(CONSULT indication)

DTC detection condition Inspection/Action

When ECM is not transmitting or receiving CAN

ECM

Except
for ECM

When ECM is not transmitting or receiving CAN communi­cation signal other than OBD (emission-related diagnosis)
for 2 seconds or more.

When a control unit is not transmitting or receiving CAN
communication signal for 2 seconds or less.

When an error is detected during the initial diagnosis for
CAN controller of each control unit.

communication signal of OBD (emission-relat­ed diagnosis) for 2 seconds or more.

When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.

Start the inspection. Re­fer to the applicable sec­tion of the indicated
control unit.

Replace the control unit
indicating “U1010”.

CAN Diagnostic Support Monitor INFOID:0000000007252605

MONITOR ITEM (CONSULT)

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LAN-12

< SYSTEM DESCRIPTION >

Example: CAN DIAG SUPPORT MNTR indication

TROUBLE DIAGNOSIS

[CAN FUNDAMENTAL]

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Without PAST

Item PRSNT Description

Initial diagnosis

Transmission diagnosis

Control unit name

(Reception diagnosis)

OK Normal at present

NG Control unit error (Except for some control units)

OK Normal at present

UNKWN

OK Normal at present

UNKWN

Unable to transmit signals for 2 seconds or more.

Diagnosis not performed

Unable to receive signals for 2 seconds or more.

Diagnosis not performed

No control unit for receiving signals. (No applicable optional parts)

With PAST

Item PRSNT PAST Description

OK Normal at present and in the past

Transmission diagnosis

Control unit name

(Reception diagnosis)

OK

UNKWN 0 Unable to transmit signals for 2 seconds or more at present.

OK

UNKWN 0 Unable to receive signals for 2 seconds or more at present.

––

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OK Normal at present and in the past

1 – 39

MONITOR ITEM (ON-BOARD DIAGNOSIS)

NOTE:

For some models, CAN communication diagnosis result is received from the vehicle monitor.

Normal at present, but unable to transmit signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)

Normal at present, but unable to receive signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)

Diagnosis not performed.

No control unit for receiving signals. (No applicable optional parts)

JSMIA0015GB

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LAN-13

TROUBLE DIAGNOSIS

< SYSTEM DESCRIPTION >

Example: Vehicle Display

Item

CAN_COMM

(Initial diagnosis)

CAN_CIRC_1

(Transmission diagnosis)

CAN_CIRC_2 – 9

(Reception diagnosis of each unit)

Result indi-

cated

OK 0 Normal at present

NG 1 – 50

OK 0 Normal at present

UNKWN 1 – 50

OK 0 Normal at present

UNKWN 1 – 50

Error counter Description

Control unit error
(The number indicates how many times diagnosis has been
run.)

Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)

Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)

Diagnosis not performed.

No control unit for receiving signals. (No applicable optional
parts)

[CAN FUNDAMENTAL]

How to Use CAN Communication Signal Chart INFOID:0000000007252606

The CAN communication signal chart lists the signals needed for trouble diagnosis. It is useful for detecting
the root cause by finding a signal related to the symptom, and by checking transmission and reception unit.

SKIB8715E

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LAN-14

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

[CAN FUNDAMENTAL]

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Trouble Diagnosis Flow Chart INFOID:0000000007252607

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JSMIA0528GB

Trouble Diagnosis Procedure INFOID:0000000007252608

INTERVIEW WITH CUSTOMER

Interview with the customer is important to detect the root cause of CAN communication system errors and to
understand vehicle condition and symptoms for proper trouble diagnosis.

Points in interview

• What: Parts name, system name

• When: Date, Frequency

• Where: Road condition, Place

• In what condition: Driving condition/environment

• Result: Symptom

NOTE:

• Check normal units as well as error symptoms.

- Example: Circuit between ECM and the combination meter is judged normal if the customer indicates
tachometer functions normally.

• When a CAN communication system error is present, multiple control units may malfunction or go into fail­safe mode.

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LAN-15

DIAGNOSIS AND REPAIR WORKFLOW

< BASIC INSPECTION >

• Indication of the combination meter is important to detect the root cause because it is the most obvious to
the customer, and it performs CAN communication with many units.

[CAN FUNDAMENTAL]

SKIB8717E

INSPECTION OF VEHICLE CONDITION

Check whether the symptom is reproduced or not.

NOTE:

Do not turn the ignition switch OFF or disconnect the battery cable while reproducing the error. The error may
temporarily correct itself, making it difficult to determine the root cause.

CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART)

Determine CAN system type based on vehicle equipment.

NOTE:

• This chart is used if CONSULT does not automatically recognize CAN system type.

• There are two styles for CAN system type specification charts. Depending on the number of available sys­tem types, either style A or style B may be used.

CAN System Type Specification Chart (Style A)

NOTE:

Revision: August 2012 2012 Maxima

LAN-16

DIAGNOSIS AND REPAIR WORKFLOW

< BASIC INSPECTION >

CAN system type is easily checked with the vehicle equipment identification information shown in the chart.

[CAN FUNDAMENTAL]

A

B

C

D

E

F

G

CAN System Type Specification Chart (Style B)

NOTE:

H

I

J

K

L

JSMIA0017GB

LAN

N

O

Revision: August 2012 2012 Maxima

LAN-17

P

DIAGNOSIS AND REPAIR WORKFLOW

< BASIC INSPECTION >

CAN system type is easily checked with the vehicle equipment identification information shown in the chart.

[CAN FUNDAMENTAL]

JSMIA0018GB

CREATE INTERVIEW SHEET

Fill out the symptom described by the customer, vehicle condition, and CAN system type on the interview
sheet.

Revision: August 2012 2012 Maxima

LAN-18

< BASIC INSPECTION >

Interview Sheet (Example)

DIAGNOSIS AND REPAIR WORKFLOW

[CAN FUNDAMENTAL]

A

B

C

D

E

F

G

DETECT THE ROOT CAUSE

CAN diagnosis function of CONSULT detects the root cause.

H

I

J

K

L

JSMIA0019GB

LAN

N

O

Revision: August 2012 2012 Maxima

LAN-19

P

HOW TO USE THIS SECTION

< HOW TO USE THIS MANUAL >

[CAN]

HOW TO USE THIS MANUAL

HOW TO USE THIS SECTION

Caution INFOID:0000000007252609

• This section describes information peculiar to a vehicle and inspection procedures.

• For trouble diagnosis procedure, refer to LAN-15, "Trouble Diagnosis Procedure"

Abbreviation List INFOID:0000000007252610

Unit name abbreviations in CONSULT CAN diagnosis and in this section are as per the following list.

Abbreviation Unit name

A-BAG Air bag diagnosis sensor unit

ABS ABS actuator and electric unit (control unit)

ADP Driver seat control unit

AV AV control unit

BCM BCM

DLC Data link connector

ECM ECM

HVAC A/C auto amp.

IPDM-E IPDM E/R

M&A Combination meter

STRG Steering angle sensor

TCM TCM

.

Revision: August 2012 2012 Maxima

LAN-20

< PRECAUTION >

PRECAUTIONS

[CAN]

PRECAUTION

PRECAUTIONS

Precaution 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 seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that 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 “SRS AIR BAG”.

• Never 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 WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precautions for Trouble Diagnosis INFOID:0000000007252613

INFOID:0000000007252611

A

B

C

D

E

F

G

H

I

J

K

CAUTION:

• Never apply 7.0 V or more to the measurement terminal.

• Use a tester with open terminal voltage of 7.0 V or less.

• Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when
checking the harness.

Precautions for Harness Repair INFOID:0000000007252614

• Solder the repaired area and wrap tape around the soldered area.

NOTE:

A fray of twisted lines must be within 110 mm (4.33 in).

SKIB8766E

Revision: August 2012 2012 Maxima

LAN-21

L

LAN

N

O

P

PRECAUTIONS

< PRECAUTION >

• Bypass connection is never allowed at the repaired area.

NOTE:

Bypass connection may cause CAN communication error. The
spliced wire becomes separated and the characteristics of twisted
line are lost.

• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica­tion line.

[CAN]

SKIB8767E

Revision: August 2012 2012 Maxima

LAN-22

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

[CAN]

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Interview Sheet INFOID:0000000007252615

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

O

P

SKIB8898E

Revision: August 2012 2012 Maxima

LAN-23

CAN COMMUNICATION SYSTEM

< SYSTEM DESCRIPTION >

[CAN]

SYSTEM DESCRIPTION

CAN COMMUNICATION SYSTEM

CAN System Specification Chart INFOID:0000000007252616

Determine CAN system type from the following specification chart.

NOTE:

Refer to LAN-15, "Trouble Diagnosis Procedure"

Body type Sedan

Axle 2WD

Engine VQ35DE

Transmission CVT

Brake control VDC

Destination Except for Mexico For Mexico

Automatic drive positioner ×××

Color display ×× ×

CAN system type 123456

×: Applicable

for how to use CAN system specification chart.

VEHICLE EQUIPMENT IDENTIFICATION INFORMATION

NOTE:

Check CAN system type from the vehicle shape and equipment.

AWMIA1162ZZ

1. Seat memory switches 2. Color display

A. With automatic drive positioner B. With color display

CAN Communication Signal Chart INFOID:0000000007252617

Refer to LAN-14, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.

NOTE:

Refer to LAN-20, "Abbreviation List"

Signal name/Connecting unit

A/C compressor request signal T R

Accelerator pedal position signal T R R

Revision: August 2012 2012 Maxima

for the abbreviations of the connecting units.

ECM

ADP

BCM

M&A

AV

HVAC

LAN-24

STRG

T: Transmit R: Receive

ABS

TCM

IPDM-E

< SYSTEM DESCRIPTION >

CAN COMMUNICATION SYSTEM

[CAN]

Signal name/Connecting unit

ASCD CRUISE indicator signal T R

ASCD SET indicator signal T R

Closed throttle position signal T R

Cooling fan speed request signal T R

Engine and CVT integrated control signal

Engine coolant temperature signal T RRRR RR

Engine speed signal T R R R R R

Engine status signal T R

Fuel consumption monitor signal

Fuel filler cap warning display signal T R

Malfunction indicator lamp signal T R

Power generation command value signal T R

System setting signal

A/C switch signal R T T

Blower fan motor switch signal R T T

Steering angle sensor signal

Buzzer output signal T R

Cornering lamp request signal T R

Day time running light request signal T R R

Door lock/unlock status signal R T

Door switch signal R T R R R

Front fog light request signal T R R R

Front wiper request signal T R R R

High beam request signal TRRRR

Horn chirp signal T R

Ignition switch signal

Key fob door unlock signal R T

Key fob ID signal R T

Key switch signal R T

Key warning signal T R

Low beam request signal T R R

Oil pressure switch signal

Position light request signal TRRRR

Rear window defogger control signal

Rear window defogger switch signal T R R

Sleep wake up signal R T R R

Stop lamp switch signal T R

ECM

TR

RT

TR

RRRT

ADP

TT R

RR T

RT R

BCM

RT

TR

RR T

TR R

M&A

TR

AV

*1

R

HVAC

STRG

TR

ABS

TCM

A

IPDM-E

B

C

D

E

F

G

H

I

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K

L

LAN

N

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P

Revision: August 2012 2012 Maxima

LAN-25

< SYSTEM DESCRIPTION >

CAN COMMUNICATION SYSTEM

[CAN]

Signal name/Connecting unit

Theft warning horn request signal T R

Trunk switch signal T R R

Turn indicator signal T R R R

Distance to empty signal T R

Fuel filler cap warning reset signal R T

Fuel level low warning signal T R

Fuel level sensor signal R T

Manual mode shift down signal T R

Manual mode shift up signal T R

Manual mode signal T R

Market information signal T R

Non manual mode signal T R

Paddle shifter shift down signal

Paddle shifter shift up signal

Parking brake switch signal R T R R

Seat belt buckle switch signal R T

Sleep-ready signal

Vehicle speed signal

A/C control signal

ABS operation signal TR

ABS warning lamp signal R T

Brake warning lamp signal R T

SLIP indicator lamp signal R T

VDC OFF indicator lamp signal R T

VDC operation signal TR

CVT indicator lamp signal R T

CVT self-diagnosis signal R T

Input shaft revolution signal R R T

Manual mode indicator signal R R T

Output shaft revolution signal R R T

P range signal RRRR RT

R range signal RRRR RT

Shift position signal R T

A/C compressor feedback signal R T

Cooling fan speed signal R T

Detention switch signal R R T

Front wiper stop position signal R T

High beam status signal R R T

Hood switch signal R R T

*2

*2

ECM

RRRTR R

ADP

BCM

RT

RT

RR TR

M&A

TR

TR

AV

TR

RT

HVAC

STRG

ABS

TCM

IPDM-E

Revision: August 2012 2012 Maxima

LAN-26

< SYSTEM DESCRIPTION >

CAN COMMUNICATION SYSTEM

[CAN]

Signal name/Connecting unit

Low beam status signal R R T

Push-button ignition switch status signal R T

Steering lock unit status signal R T

*1: Models with rear view monitor

2

*

: Models with paddle shifter

ECM

ADP

BCM

M&A

AV

HVAC

STRG

ABS

TCM

NOTE:

CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.

A

IPDM-E

B

C

D

E

F

G

H

I

J

K

L

LAN

N

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Revision: August 2012 2012 Maxima

LAN-27

CAN SYSTEM

< WIRING DIAGRAM >

[CAN]

WIRING DIAGRAM

CAN SYSTEM

Wiring Diagram INFOID:0000000007252618

ABMWA0486GB

Revision: August 2012 2012 Maxima

LAN-28

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

O

ABMWA1717GB

Revision: August 2012 2012 Maxima

LAN-29

P

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

ABMIA0002GB

Revision: August 2012 2012 Maxima

LAN-30

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

O

ABMIA2434GB

Revision: August 2012 2012 Maxima

LAN-31

P

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

ABMIA2435GB

Revision: August 2012 2012 Maxima

LAN-32

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

O

ABMIA2436GB

Revision: August 2012 2012 Maxima

LAN-33

P

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

ABMIA2437GB

Revision: August 2012 2012 Maxima

LAN-34

< WIRING DIAGRAM >

CAN SYSTEM

[CAN]

A

B

C

D

E

F

G

H

I

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K

L

LAN

N

O

ABMIA2438GB

Revision: August 2012 2012 Maxima

LAN-35

P

CAN COMMUNICATION SYSTEM

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

DTC/CIRCUIT DIAGNOSIS

CAN COMMUNICATION SYSTEM

Component Parts Location INFOID:0000000007252619

1. ABS actuator and electric unit (con­trol unit) E26

4. IPDM E/R E17 5. BCM M19 6. Combination meter M24

7. Data link connector M22 8. Steering angle sensor M53 9. Driver seat control unit B203

10. Air bag diagnosis sensor unit M35 11. A/C auto amp. M37 12. AV control unit

AWMIA1101ZZ

2. TCM F15 3. ECM E10

M156: Without navigation system
M163: With navigation system

Revision: August 2012 2012 Maxima

LAN-36

< DTC/CIRCUIT DIAGNOSIS >

MALFUNCTION AREA CHART

[CAN]

MALFUNCTION AREA CHART

Main Line INFOID:0000000007252620

Malfunction area Reference

Main line between driver seat control unit and data link connector LAN-38, "Diagnosis Procedure"

Main line between data link connector and A/C auto amp. LAN-39, "Diagnosis Procedure"

Main line between A/C auto amp. and ABS actuator and electric unit (control unit) LAN-40, "Diagnosis Procedure"

Main line between A/C auto amp. and air bag diagnosis sensor unit LAN-41, "Diagnosis Procedure"

Main line between air bag diagnosis sensor unit and ABS actuator and electric unit
(control unit)

Branch Line INFOID:0000000007252621

Malfunction area Reference

ECM branch line circuit LAN-43, "Diagnosis Procedure"

Driver seat control unit branch line circuit LAN-44, "Diagnosis Procedure"

BCM branch line circuit LAN-45, "Diagnosis Procedure"

Data link connector branch line circuit LAN-46, "Diagnosis Procedure"

Combination meter branch line circuit LAN-47, "Diagnosis Procedure"

AV control unit branch line circuit LAN-48, "Diagnosis Procedure"

A/C auto amp. branch line circuit LAN-49, "Diagnosis Procedure"

Steering angle sensor branch line circuit LAN-50, "Diagnosis Procedure"

Air bag diagnosis sensor unit branch line circuit LAN-51, "Diagnosis Procedure"

ABS actuator and electric unit (control unit) branch line circuit LAN-52, "Diagnosis Procedure"

TCM branch line circuit LAN-53, "Diagnosis Procedure"

IPDM E/R branch line circuit LAN-54, "Diagnosis Procedure"

Short Circuit INFOID:0000000007252622

LAN-42, "Diagnosis Procedure"

A

B

C

D

E

F

G

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K

Malfunction area Reference

CAN communication circuit LAN-55, "Diagnosis Procedure"

Revision: August 2012 2012 Maxima

LAN-37

L

LAN

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P

MAIN LINE BETWEEN ADP AND DLC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN ADP AND DLC CIRCUIT

Diagnosis Procedure INFOID:0000000007252623

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector B1

- Harness connector M6

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- Harness connectors B208 and B32

- Harness connectors B1 and M6

2. Check the continuity between the harness connectors.

Harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

B32

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.

9

10 16J Existed

B1

15J Existed

Continuity

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the harness connector and the data link connector.

Connector No. Terminal No. Connector No. Terminal No.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the driver seat control unit and the data link

NO >> Repair the main line between the harness connector M6 and the data link connector.

Harness connector Data link connector

M6

connector.

15J

16J 14 Existed

M22

Continuity

6 Existed

Revision: August 2012 2012 Maxima

LAN-38

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

Diagnosis Procedure INFOID:0000000007252624

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

-ECM

- A/C auto amp.

4. Check the continuity between the data link connector and the A/C auto amp. harness connector.

Data link connector A/C auto amp. harness connector

Connector No. Terminal No. Connector No. Terminal No.

M22

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the data link connector and the A/C auto

amp.

NO >> Repair the main line between the data link connector and the A/C auto amp.

6

14 2 Existed

M37

1 Existed

Continuity

A

B

C

D

E

F

G

H

I

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K

L

LAN

N

O

P

Revision: August 2012 2012 Maxima

LAN-39

MAIN LINE BETWEEN HVAC AND ABS CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN HVAC AND ABS CIRCUIT

Diagnosis Procedure INFOID:0000000007252625

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector M1

- Harness connector E30

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

2. Check the continuity between the A/C auto amp. harness connector and the harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the A/C auto amp. and the harness connector M1.

1

2 8G Existed

M1

15G Existed

Continuity

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

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

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

Harness connector

Connector No. Terminal No. Connector No. Terminal No.

E30

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the ABS actuator and

electric unit (control unit).

NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit

(control unit).

15G

8G 15 Existed

ABS actuator and electric unit (control unit)

harness connector

E26

26 Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-40

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

Diagnosis Procedure INFOID:0000000007252626

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

4. Check the continuity between the harness connector and the A/C auto amp. harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the air bag diagnosis

sensor unit.

NO >> Repair the main line between the A/C auto amp. and the air bag diagnosis sensor unit.

1

2 8G Existed

M1

15G Existed

Continuity

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

O

P

Revision: August 2012 2012 Maxima

LAN-41

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

Diagnosis Procedure INFOID:0000000007252627

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector M1

- Harness connector E30

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

2. Check the continuity between the A/C auto amp. harness connector and the harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the air bag diagnosis sensor unit and the harness connector M1.

1

2 8G Existed

M1

15G Existed

Continuity

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

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

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

Harness connector

Connector No. Terminal No. Connector No. Terminal No.

E30

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the air bag diagnosis sensor unit and the

ABS actuator and electric unit (control unit).

NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit

(control unit).

15G

8G 15 Existed

ABS actuator and electric unit (control unit)

harness connector

E26

26 Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-42

< DTC/CIRCUIT DIAGNOSIS >

ECM BRANCH LINE CIRCUIT

[CAN]

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252628

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Models without automatic drive positioner

•ECM

• Harness connector E30

• Harness connector M1

- Models with automatic drive positioner

•ECM

• Harness connector E29

• Harness connector B10

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

ECM harness connector

Connector No. Terminal No.

E10 98 97 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ECM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to EC-155, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to EC-17, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT : Description".

YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

A

B

C

D

E

F

G

H

I

J

.

K

L

LAN

Revision: August 2012 2012 Maxima

LAN-43

N

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ADP BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

ADP BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252629

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Driver seat control unit

- Harness connector B208

- Harness connector B32

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of driver seat control unit.

2. Check the resistance between the driver seat control unit harness connector terminals.

Driver seat control unit harness connector

Connector No. Terminal No.

B203 16 32 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-48, "DRIVER SEAT

CONTROL UNIT : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the driver seat control unit. Refer to ADP-171, "Removal and Installation".

YES (Past error)>>Error was detected in the driver seat control unit branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-44

< DTC/CIRCUIT DIAGNOSIS >

BCM BRANCH LINE CIRCUIT

[CAN]

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252630

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of BCM.

2. Check the resistance between the BCM harness connector terminals.

BCM harness connector

Connector No. Terminal No.

M19 79 78 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the BCM branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the BCM. Refer to BCS-36, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the BCM. Refer to BCS-80, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

.

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Revision: August 2012 2012 Maxima

LAN-45

DLC BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252631

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Approx. 54 – 66

Is the measurement value within the specification?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO >> Repair the data link connector branch line.

Resistance (Ω)

Revision: August 2012 2012 Maxima

LAN-46

< DTC/CIRCUIT DIAGNOSIS >

M&A BRANCH LINE CIRCUIT

[CAN]

M&A BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252632

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the combination meter for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of combination meter.

2. Check the resistance between the combination meter harness connector terminals.

Combination meter harness connector

Connector No. Terminal No.

M24 21 22 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the combination meter. Refer to MWI-37, "COMBINATION

METER : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the combination meter. Refer to MWI-121, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.

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Revision: August 2012 2012 Maxima

LAN-47

AV BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

AV BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252633

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the AV control unit for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of AV control unit.

2. Check the resistance between the AV control unit harness connector terminals.

- Models without navigation system

AV control unit harness connector

Connector No. Terminal No.

M156 86 87 Approx. 54 – 66

- Models with navigation system

AV control unit harness connector

Connector No. Terminal No.

M163 62 46 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the AV control unit branch line.

Resistance (Ω)

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AV control unit. Refer to the following.

• Models with BOSE audio with color display: AV-232, "AV CONTROL UNIT : Diagnosis Procedure"

• Models with BOSE audio with color display with navigation system: AV-412, "AV CONTROL UNIT : Diagno-

sis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the AV control unit. Refer to the following.

• Models with BOSE audio with color display: AV-322, "Removal and Installation"

• Models with BOSE audio with color display with navigation system: AV-490, "Removal and

Installation"

YES (Past error)>>Error was detected in the AV control unit branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-48

< DTC/CIRCUIT DIAGNOSIS >

HVAC BRANCH LINE CIRCUIT

[CAN]

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252634

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/C auto amp.

2. Check the resistance between the A/C auto amp. harness connector terminals.

A/C auto amp. harness connector

Connector No. Terminal No.

M37 1 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.

• Models with color display: HAC-60, "A/C AUTO AMP. : Diagnosis Procedure"

• Models with monochrome display: HAC-168, "A/C AUTO AMP. : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the A/C auto amp. Refer to the following.

• Models with color display: HAC-104, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

• Models monochrome display: HAC-211, "Removal and Installation"

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Revision: August 2012 2012 Maxima

LAN-49

STRG BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252635

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of steering angle sensor.

2. Check the resistance between the steering angle sensor harness connector terminals.

Steering angle sensor harness connector

Connector No. Terminal No.

M53 5 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-85, "Wiring Dia-

gram".

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to BRC-109, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-50

< DTC/CIRCUIT DIAGNOSIS >

A-BAG BRANCH LINE CIRCUIT

[CAN]

A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252636

WARNING:

Always observe the following items for preventing accidental activation.

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the air bag diagnosis sensor unit for damage, bend and loose con-

nection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Replace the main harness.

2.CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow"
Is the inspection result normal?

YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.

.

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C

D

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Revision: August 2012 2012 Maxima

LAN-51

ABS BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252637

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

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

2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi­nals.

ABS actuator and electric unit (control unit) harness connector

Connector No. Terminal No.

E26 26 15 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-85, "Wiring Diagram"

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-106, "Exploded

View".

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.

NO >> Repair the power supply and the ground circuit.

.

Revision: August 2012 2012 Maxima

LAN-52

< DTC/CIRCUIT DIAGNOSIS >

TCM BRANCH LINE CIRCUIT

[CAN]

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252638

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

-TCM

- Harness connector F1

- Harness connector E3

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of TCM.

2. Check the resistance between the TCM harness connector terminals.

TCM harness connector

Connector No. Terminal No.

F15 32 31 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the TCM branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

I

Check the power supply and the ground circuit of the TCM. Refer to TM-120, "Wiring Diagram"
Is the inspection result normal?

YES (Present error)>>Replace the TCM. Refer to TM-162, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.

NO >> Repair the power supply and the ground circuit.

.

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Revision: August 2012 2012 Maxima

LAN-53

IPDM-E BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007252639

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the IPDM E/R for damage, bend and loose connection (unit side
and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of IPDM E/R.

2. Check the resistance between the IPDM E/R harness connector terminals.

IPDM E/R harness connector

Connector No. Terminal No.

E17 40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-18, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to PCS-35, "Removal and Installation".
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.

.

Revision: August 2012 2012 Maxima

LAN-54

< DTC/CIRCUIT DIAGNOSIS >

CAN COMMUNICATION CIRCUIT

[CAN]

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure INFOID:0000000007252640

1.CONNECTOR INSPECTION

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect all the unit connectors on CAN communication system.

4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Not existed

Is the inspection result normal?

YES >> GO TO 3.
NO >> Check the harness and repair the root cause.

Continuity

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

A

B

C

D

E

F

G

H

Check the continuity between the data link connector and the ground.

Data link connector

Connector No. Terminal No.

M22

Is the inspection result normal?

YES >> GO TO 4.
NO >> Check the harness and repair the root cause.

6 Not existed

14 Not existed

4.CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

1. Remove the ECM and the IPDM E/R.

2. Check the resistance between the ECM terminals.

ECM

Ter m i na l No .

98 97 Approx. 108 – 132

3. Check the resistance between the IPDM E/R terminals.

IPDM E/R

Ter m i na l No .

40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 5.
NO >> Replace the ECM and/or the IPDM E/R.

Resistance (Ω)

Resistance (Ω)

5.CHECK SYMPTOM

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Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.

Revision: August 2012 2012 Maxima

LAN-55

CAN COMMUNICATION CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

[CAN]

6.CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect one of the unit connectors of CAN communication system.

NOTE:

ECM and IPDM E/R have a termination circuit. Check other units first.

4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.

NOTE:

Although unit-related error symptoms occur, do not confuse them with other symptoms.

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

Revision: August 2012 2012 Maxima

LAN-56

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

Diagnosis Procedure INFOID:0000000007800531

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

-ECM

- A/C auto amp.

4. Check the continuity between the data link connector and the A/C auto amp. harness connector.

Data link connector A/C auto amp. harness connector

Connector No. Terminal No. Connector No. Terminal No.

M22

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the data link connector and the A/C auto

amp.

NO >> Repair the main line between the data link connector and the A/C auto amp.

6

14 2 Existed

M37

1 Existed

Continuity

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Revision: August 2012 2012 Maxima

LAN-57

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

Diagnosis Procedure INFOID:0000000007800533

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

4. Check the continuity between the harness connector and the A/C auto amp. harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the air bag diagnosis

sensor unit.

NO >> Repair the main line between the A/C auto amp. and the air bag diagnosis sensor unit.

1

2 8G Existed

M1

15G Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-58

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

Diagnosis Procedure INFOID:0000000007800534

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector M1

- Harness connector E30

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

2. Check the continuity between the A/C auto amp. harness connector and the harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

1

2 8G Existed

M1

15G Existed

Continuity

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the air bag diagnosis sensor unit and the harness connector M1.

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

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

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

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B

C

D

E

F

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Harness connector

Connector No. Terminal No. Connector No. Terminal No.

E30

15G

8G 15 Existed

ABS actuator and electric unit (control unit)

harness connector

E26

26 Existed

Continuity

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the air bag diagnosis sensor unit and the

ABS actuator and electric unit (control unit).

NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit

(control unit).

Revision: August 2012 2012 Maxima

LAN-59

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ECM BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800535

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Models without automatic drive positioner

•ECM

• Harness connector E30

• Harness connector M1

- Models with automatic drive positioner

•ECM

• Harness connector E29

• Harness connector B10

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

ECM harness connector

Connector No. Terminal No.

E10 98 97 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ECM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to EC-155, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to EC-17, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT : Description".

YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

.

Revision: August 2012 2012 Maxima

LAN-60

< DTC/CIRCUIT DIAGNOSIS >

BCM BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 1)]

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800537

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of BCM.

2. Check the resistance between the BCM harness connector terminals.

BCM harness connector

Connector No. Terminal No.

M19 79 78 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the BCM branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the BCM. Refer to BCS-36, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the BCM. Refer to BCS-80, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

.

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Revision: August 2012 2012 Maxima

LAN-61

DLC BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800538

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Approx. 54 – 66

Is the measurement value within the specification?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO >> Repair the data link connector branch line.

Resistance (Ω)

Revision: August 2012 2012 Maxima

LAN-62

< DTC/CIRCUIT DIAGNOSIS >

M&A BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 1)]

M&A BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800539

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the combination meter for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of combination meter.

2. Check the resistance between the combination meter harness connector terminals.

Combination meter harness connector

Connector No. Terminal No.

M24 21 22 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the combination meter. Refer to MWI-37, "COMBINATION

METER : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the combination meter. Refer to MWI-121, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.

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Revision: August 2012 2012 Maxima

LAN-63

HVAC BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800541

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/C auto amp.

2. Check the resistance between the A/C auto amp. harness connector terminals.

A/C auto amp. harness connector

Connector No. Terminal No.

M37 1 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.

• Models with color display: HAC-60, "A/C AUTO AMP. : Diagnosis Procedure"

• Models with monochrome display: HAC-168, "A/C AUTO AMP. : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the A/C auto amp. Refer to the following.

• Models with color display: HAC-104, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

• Models monochrome display: HAC-211, "Removal and Installation"

Resistance (Ω)

Revision: August 2012 2012 Maxima

LAN-64

< DTC/CIRCUIT DIAGNOSIS >

STRG BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 1)]

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800542

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of steering angle sensor.

2. Check the resistance between the steering angle sensor harness connector terminals.

Steering angle sensor harness connector

Connector No. Terminal No.

M53 5 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-85, "Wiring Dia-

gram".

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to BRC-109, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.

I

J

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P

Revision: August 2012 2012 Maxima

LAN-65

A-BAG BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800543

WARNING:

Always observe the following items for preventing accidental activation.

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the air bag diagnosis sensor unit for damage, bend and loose con-

nection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Replace the main harness.

2.CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow"
Is the inspection result normal?

YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.

.

Revision: August 2012 2012 Maxima

LAN-66

< DTC/CIRCUIT DIAGNOSIS >

ABS BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 1)]

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800544

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

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

2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi­nals.

ABS actuator and electric unit (control unit) harness connector

Connector No. Terminal No.

E26 26 15 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-85, "Wiring Diagram"

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-106, "Exploded

View".

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.

NO >> Repair the power supply and the ground circuit.

.

A

B

C

D

E

F

G

H

I

J

K

Revision: August 2012 2012 Maxima

LAN-67

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TCM BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800545

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

-TCM

- Harness connector F1

- Harness connector E3

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of TCM.

2. Check the resistance between the TCM harness connector terminals.

TCM harness connector

Connector No. Terminal No.

F15 32 31 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the TCM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the TCM. Refer to TM-120, "Wiring Diagram"
Is the inspection result normal?

YES (Present error)>>Replace the TCM. Refer to TM-162, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.

NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

.

Revision: August 2012 2012 Maxima

LAN-68

< DTC/CIRCUIT DIAGNOSIS >

IPDM-E BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 1)]

IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800546

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the IPDM E/R for damage, bend and loose connection (unit side
and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of IPDM E/R.

2. Check the resistance between the IPDM E/R harness connector terminals.

IPDM E/R harness connector

Connector No. Terminal No.

E17 40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-18, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to PCS-35, "Removal and Installation".
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.

.

I

J

K

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Revision: August 2012 2012 Maxima

LAN-69

CAN COMMUNICATION CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure INFOID:0000000007800547

1.CONNECTOR INSPECTION

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect all the unit connectors on CAN communication system.

4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Not existed

Is the inspection result normal?

YES >> GO TO 3.
NO >> Check the harness and repair the root cause.

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector and the ground.

Data link connector

Connector No. Terminal No.

M22

Is the inspection result normal?

YES >> GO TO 4.
NO >> Check the harness and repair the root cause.

6 Not existed

14 Not existed

4.CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

1. Remove the ECM and the IPDM E/R.

2. Check the resistance between the ECM terminals.

Continuity

Continuity

Ground

ECM

Ter m i na l No .

98 97 Approx. 108 – 132

3. Check the resistance between the IPDM E/R terminals.

IPDM E/R

Ter m i na l No .

40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 5.
NO >> Replace the ECM and/or the IPDM E/R.

Resistance (Ω)

Resistance (Ω)

LKIA0037E

5.CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.

Revision: August 2012 2012 Maxima

LAN-70

CAN COMMUNICATION CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

[CAN SYSTEM (TYPE 1)]

6.CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect one of the unit connectors of CAN communication system.

NOTE:

ECM and IPDM E/R have a termination circuit. Check other units first.

4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.

NOTE:

Although unit-related error symptoms occur, do not confuse them with other symptoms.

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

A

B

C

D

E

F

G

H

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Revision: August 2012 2012 Maxima

LAN-71

P

MAIN LINE BETWEEN ADP AND DLC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN ADP AND DLC CIRCUIT

Diagnosis Procedure INFOID:0000000007800549

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector B1

- Harness connector M6

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- Harness connectors B208 and B32

- Harness connectors B1 and M6

2. Check the continuity between the harness connectors.

Harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

B32

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.

9

10 16J Existed

B1

15J Existed

Continuity

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the harness connector and the data link connector.

Harness connector Data link connector

Connector No. Terminal No. Connector No. Terminal No.

M6

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the driver seat control unit and the data link

connector.

NO >> Repair the main line between the harness connector M6 and the data link connector.

15J

16J 14 Existed

M22

6 Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-72

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

Diagnosis Procedure INFOID:0000000007800550

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

-ECM

- A/C auto amp.

4. Check the continuity between the data link connector and the A/C auto amp. harness connector.

Data link connector A/C auto amp. harness connector

Connector No. Terminal No. Connector No. Terminal No.

M22

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the data link connector and the A/C auto

amp.

NO >> Repair the main line between the data link connector and the A/C auto amp.

6

14 2 Existed

M37

1 Existed

Continuity

A

B

C

D

E

F

G

H

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Revision: August 2012 2012 Maxima

LAN-73

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

Diagnosis Procedure INFOID:0000000007800552

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

4. Check the continuity between the harness connector and the A/C auto amp. harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the air bag diagnosis

sensor unit.

NO >> Repair the main line between the A/C auto amp. and the air bag diagnosis sensor unit.

1

2 8G Existed

M1

15G Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-74

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

Diagnosis Procedure INFOID:0000000007800553

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector M1

- Harness connector E30

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

2. Check the continuity between the A/C auto amp. harness connector and the harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

1

2 8G Existed

M1

15G Existed

Continuity

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the air bag diagnosis sensor unit and the harness connector M1.

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

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

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

A

B

C

D

E

F

G

H

I

J

K

Harness connector

Connector No. Terminal No. Connector No. Terminal No.

E30

15G

8G 15 Existed

ABS actuator and electric unit (control unit)

harness connector

E26

26 Existed

Continuity

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the air bag diagnosis sensor unit and the

ABS actuator and electric unit (control unit).

NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit

(control unit).

Revision: August 2012 2012 Maxima

LAN-75

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ECM BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800554

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Models without automatic drive positioner

•ECM

• Harness connector E30

• Harness connector M1

- Models with automatic drive positioner

•ECM

• Harness connector E29

• Harness connector B10

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

ECM harness connector

Connector No. Terminal No.

E10 98 97 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ECM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to EC-155, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to EC-17, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT : Description".

YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

.

Revision: August 2012 2012 Maxima

LAN-76

< DTC/CIRCUIT DIAGNOSIS >

ADP BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 2)]

ADP BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800555

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Driver seat control unit

- Harness connector B208

- Harness connector B32

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of driver seat control unit.

2. Check the resistance between the driver seat control unit harness connector terminals.

Driver seat control unit harness connector

Connector No. Terminal No.

B203 16 32 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

I

Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-48, "DRIVER SEAT

CONTROL UNIT : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the driver seat control unit. Refer to ADP-171, "Removal and Installation".

YES (Past error)>>Error was detected in the driver seat control unit branch line.
NO >> Repair the power supply and the ground circuit.

J

K

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Revision: August 2012 2012 Maxima

LAN-77

BCM BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800556

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of BCM.

2. Check the resistance between the BCM harness connector terminals.

BCM harness connector

Connector No. Terminal No.

M19 79 78 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the BCM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the BCM. Refer to BCS-36, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the BCM. Refer to BCS-80, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

.

Revision: August 2012 2012 Maxima

LAN-78

< DTC/CIRCUIT DIAGNOSIS >

DLC BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 2)]

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800557

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Approx. 54 – 66

Is the measurement value within the specification?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO >> Repair the data link connector branch line.

Resistance (Ω)

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

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P

Revision: August 2012 2012 Maxima

LAN-79

M&A BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

M&A BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800558

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the combination meter for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of combination meter.

2. Check the resistance between the combination meter harness connector terminals.

Combination meter harness connector

Connector No. Terminal No.

M24 21 22 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the combination meter. Refer to MWI-37, "COMBINATION

METER : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the combination meter. Refer to MWI-121, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-80

< DTC/CIRCUIT DIAGNOSIS >

HVAC BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 2)]

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800560

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/C auto amp.

2. Check the resistance between the A/C auto amp. harness connector terminals.

A/C auto amp. harness connector

Connector No. Terminal No.

M37 1 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.

• Models with color display: HAC-60, "A/C AUTO AMP. : Diagnosis Procedure"

• Models with monochrome display: HAC-168, "A/C AUTO AMP. : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the A/C auto amp. Refer to the following.

• Models with color display: HAC-104, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

• Models monochrome display: HAC-211, "Removal and Installation"

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J

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Revision: August 2012 2012 Maxima

LAN-81

STRG BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800561

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of steering angle sensor.

2. Check the resistance between the steering angle sensor harness connector terminals.

Steering angle sensor harness connector

Connector No. Terminal No.

M53 5 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-85, "Wiring Dia-

gram".

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to BRC-109, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-82

< DTC/CIRCUIT DIAGNOSIS >

A-BAG BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 2)]

A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800562

WARNING:

Always observe the following items for preventing accidental activation.

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the air bag diagnosis sensor unit for damage, bend and loose con-

nection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Replace the main harness.

2.CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow"
Is the inspection result normal?

YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.

.

A

B

C

D

E

F

G

H

I

J

K

L

LAN

N

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P

Revision: August 2012 2012 Maxima

LAN-83

ABS BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800563

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

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

2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi­nals.

ABS actuator and electric unit (control unit) harness connector

Connector No. Terminal No.

E26 26 15 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-85, "Wiring Diagram"

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-106, "Exploded

View".

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.

NO >> Repair the power supply and the ground circuit.

.

Revision: August 2012 2012 Maxima

LAN-84

< DTC/CIRCUIT DIAGNOSIS >

TCM BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 2)]

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800564

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

-TCM

- Harness connector F1

- Harness connector E3

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of TCM.

2. Check the resistance between the TCM harness connector terminals.

TCM harness connector

Connector No. Terminal No.

F15 32 31 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the TCM branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

I

Check the power supply and the ground circuit of the TCM. Refer to TM-120, "Wiring Diagram"
Is the inspection result normal?

YES (Present error)>>Replace the TCM. Refer to TM-162, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.

NO >> Repair the power supply and the ground circuit.

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Revision: August 2012 2012 Maxima

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IPDM-E BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800565

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the IPDM E/R for damage, bend and loose connection (unit side
and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of IPDM E/R.

2. Check the resistance between the IPDM E/R harness connector terminals.

IPDM E/R harness connector

Connector No. Terminal No.

E17 40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-18, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to PCS-35, "Removal and Installation".
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.

.

Revision: August 2012 2012 Maxima

LAN-86

< DTC/CIRCUIT DIAGNOSIS >

CAN COMMUNICATION CIRCUIT

[CAN SYSTEM (TYPE 2)]

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure INFOID:0000000007800566

1.CONNECTOR INSPECTION

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect all the unit connectors on CAN communication system.

4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Not existed

Is the inspection result normal?

YES >> GO TO 3.
NO >> Check the harness and repair the root cause.

Continuity

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

A

B

C

D

E

F

G

H

Check the continuity between the data link connector and the ground.

Data link connector

Connector No. Terminal No.

M22

Is the inspection result normal?

YES >> GO TO 4.
NO >> Check the harness and repair the root cause.

6 Not existed

14 Not existed

4.CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

1. Remove the ECM and the IPDM E/R.

2. Check the resistance between the ECM terminals.

ECM

Ter m i na l No .

98 97 Approx. 108 – 132

3. Check the resistance between the IPDM E/R terminals.

IPDM E/R

Ter m i na l No .

40 39 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 5.
NO >> Replace the ECM and/or the IPDM E/R.

Resistance (Ω)

Resistance (Ω)

5.CHECK SYMPTOM

I

Continuity

Ground

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Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.

Revision: August 2012 2012 Maxima

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CAN COMMUNICATION CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

[CAN SYSTEM (TYPE 2)]

6.CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect one of the unit connectors of CAN communication system.

NOTE:

ECM and IPDM E/R have a termination circuit. Check other units first.

4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.

NOTE:

Although unit-related error symptoms occur, do not confuse them with other symptoms.

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

Revision: August 2012 2012 Maxima

LAN-88

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN DLC AND HVAC CIRCUIT

Diagnosis Procedure INFOID:0000000007800568

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

-ECM

- A/C auto amp.

4. Check the continuity between the data link connector and the A/C auto amp. harness connector.

Data link connector A/C auto amp. harness connector

Connector No. Terminal No. Connector No. Terminal No.

M22

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the data link connector and the A/C auto

amp.

NO >> Repair the main line between the data link connector and the A/C auto amp.

6

14 2 Existed

M37

1 Existed

Continuity

A

B

C

D

E

F

G

H

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Revision: August 2012 2012 Maxima

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MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

MAIN LINE BETWEEN HVAC AND A-BAG CIRCUIT

Diagnosis Procedure INFOID:0000000007800570

1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

4. Check the continuity between the harness connector and the A/C auto amp. harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the air bag diagnosis

sensor unit.

NO >> Repair the main line between the A/C auto amp. and the air bag diagnosis sensor unit.

1

2 8G Existed

M1

15G Existed

Continuity

Revision: August 2012 2012 Maxima

LAN-90

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

MAIN LINE BETWEEN A-BAG AND ABS CIRCUIT

Diagnosis Procedure INFOID:0000000007800571

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

- Harness connector M1

- Harness connector E30

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

- A/C auto amp.

- Harness connectors M1 and E30

2. Check the continuity between the A/C auto amp. harness connector and the harness connector.

A/C auto amp. harness connector Harness connector

Connector No. Terminal No. Connector No. Terminal No.

M37

1

2 8G Existed

M1

15G Existed

Continuity

Is the inspection result normal?

YES >> GO TO 3.
NO >> Repair the main line between the air bag diagnosis sensor unit and the harness connector M1.

3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

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

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

A

B

C

D

E

F

G

H

I

J

K

Harness connector

Connector No. Terminal No. Connector No. Terminal No.

E30

15G

8G 15 Existed

ABS actuator and electric unit (control unit)

harness connector

E26

26 Existed

Continuity

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the air bag diagnosis sensor unit and the

ABS actuator and electric unit (control unit).

NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit

(control unit).

Revision: August 2012 2012 Maxima

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ECM BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800572

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con­nector side).

- Models without automatic drive positioner

•ECM

• Harness connector E30

• Harness connector M1

- Models with automatic drive positioner

•ECM

• Harness connector E29

• Harness connector B10

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

ECM harness connector

Connector No. Terminal No.

E10 98 97 Approx. 108 – 132

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ECM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to EC-155, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to EC-17, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT : Description".

YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Resistance (Ω)

.

Revision: August 2012 2012 Maxima

LAN-92

< DTC/CIRCUIT DIAGNOSIS >

BCM BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 3)]

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800574

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of BCM.

2. Check the resistance between the BCM harness connector terminals.

BCM harness connector

Connector No. Terminal No.

M19 79 78 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the BCM branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the BCM. Refer to BCS-36, "Diagnosis Procedure"
Is the inspection result normal?

YES (Present error)>>Replace the BCM. Refer to BCS-80, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

.

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Revision: August 2012 2012 Maxima

LAN-93

DLC BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800575

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Data link connector

Connector No. Terminal No.

M22 6 14 Approx. 54 – 66

Is the measurement value within the specification?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO >> Repair the data link connector branch line.

Resistance (Ω)

Revision: August 2012 2012 Maxima

LAN-94

< DTC/CIRCUIT DIAGNOSIS >

M&A BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 3)]

M&A BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800576

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the combination meter for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of combination meter.

2. Check the resistance between the combination meter harness connector terminals.

Combination meter harness connector

Connector No. Terminal No.

M24 21 22 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the combination meter. Refer to MWI-37, "COMBINATION

METER : Diagnosis Procedure".

Is the inspection result normal?

YES (Present error)>>Replace the combination meter. Refer to MWI-121, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.

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Revision: August 2012 2012 Maxima

LAN-95

AV BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

AV BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800577

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the AV control unit for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of AV control unit.

2. Check the resistance between the AV control unit harness connector terminals.

- Models without navigation system

AV control unit harness connector

Connector No. Terminal No.

M156 86 87 Approx. 54 – 66

- Models with navigation system

AV control unit harness connector

Connector No. Terminal No.

M163 62 46 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the AV control unit branch line.

Resistance (Ω)

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AV control unit. Refer to the following.

• Models with BOSE audio with color display: AV-232, "AV CONTROL UNIT : Diagnosis Procedure"

• Models with BOSE audio with color display with navigation system: AV-412, "AV CONTROL UNIT : Diagno-

sis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the AV control unit. Refer to the following.

• Models with BOSE audio with color display: AV-322, "Removal and Installation"

• Models with BOSE audio with color display with navigation system: AV-490, "Removal and

Installation"

YES (Past error)>>Error was detected in the AV control unit branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-96

< DTC/CIRCUIT DIAGNOSIS >

HVAC BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 3)]

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800578

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/C auto amp.

2. Check the resistance between the A/C auto amp. harness connector terminals.

A/C auto amp. harness connector

Connector No. Terminal No.

M37 1 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

A

B

C

D

E

F

G

H

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.

• Models with color display: HAC-60, "A/C AUTO AMP. : Diagnosis Procedure"

• Models with monochrome display: HAC-168, "A/C AUTO AMP. : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the A/C auto amp. Refer to the following.

• Models with color display: HAC-104, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

• Models monochrome display: HAC-211, "Removal and Installation"

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Revision: August 2012 2012 Maxima

LAN-97

STRG BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800579

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of steering angle sensor.

2. Check the resistance between the steering angle sensor harness connector terminals.

Steering angle sensor harness connector

Connector No. Terminal No.

M53 5 2 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-85, "Wiring Dia-

gram".

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to BRC-109, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.

Revision: August 2012 2012 Maxima

LAN-98

< DTC/CIRCUIT DIAGNOSIS >

A-BAG BRANCH LINE CIRCUIT

[CAN SYSTEM (TYPE 3)]

A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800580

WARNING:

Always observe the following items for preventing accidental activation.

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the air bag diagnosis sensor unit for damage, bend and loose con-

nection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Replace the main harness.

2.CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow"
Is the inspection result normal?

YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.

.

A

B

C

D

E

F

G

H

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Revision: August 2012 2012 Maxima

LAN-99

ABS BRANCH LINE CIRCUIT

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure INFOID:0000000007800581

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).

Is the inspection result normal?

YES >> GO TO 2.
NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

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

2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi­nals.

ABS actuator and electric unit (control unit) harness connector

Connector No. Terminal No.

E26 26 15 Approx. 54 – 66

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.

Resistance (Ω)

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-85, "Wiring Diagram"

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-106, "Exploded

View".

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.

NO >> Repair the power supply and the ground circuit.

.

Revision: August 2012 2012 Maxima

LAN-100