ELECTRICAL & POWER CONTROL

SECTION LAN LAN SYSTEM

B

E
CONTENTS
CAN FUNDAMENTAL PRECAUTION .............................................. 21 F

PRECAUTION ............................................... 5 PRECAUTIONS ................................................. 21

Precaution for Supplemental Restraint System G
PRECAUTIONS ................................................... 5 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
Precautions for Trouble Diagnosis ............................ 5
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SIONER" .................................................................21
Precautions for Harness Repair ................................ 5 Precautions for Trouble Diagnosis ..........................21
H
Precautions for Harness Repair ..............................21
FUNCTION DIAGNOSIS ............................... 6
BASIC INSPECTION ................................... 23
CAN COMMUNICATION SYSTEM ..................... 6
I
System Description ................................................... 6 DIAGNOSIS AND REPAIR WORKFLOW ........ 23
System Diagram ........................................................ 6 Interview Sheet ........................................................23
CAN Communication Control Circuit ......................... 7
FUNCTION DIAGNOSIS .............................. 24 J
DIAG ON CAN ..................................................... 8
Description ................................................................ 8 CAN COMMUNICATION SYSTEM ................... 24
System Diagram ........................................................ 8 CAN System Specification Chart .............................24 K
CAN Communication Signal Chart ..........................24
TROUBLE DIAGNOSIS ...................................... 9
Condition of Error Detection ...................................... 9 COMPONENT DIAGNOSIS ......................... 27
Symptom When Error Occurs in CAN Communi- L
cation System ............................................................ 9 CAN COMMUNICATION SYSTEM ................... 27
CAN Diagnosis with CONSULT-III .......................... 12 Component Parts Location ......................................27
Self-Diagnosis ......................................................... 12 Wiring Diagram - CAN SYSTEM - ...........................28 LAN
CAN Diagnostic Support Monitor ............................ 12
How to Use CAN Communication Signal Chart ...... 14
MALFUNCTION AREA CHART ........................ 36
Main Line .................................................................36
BASIC INSPECTION ................................... 15 Branch Line .............................................................36 N
Short Circuit .............................................................36
DIAGNOSIS AND REPAIR WORKFLOW .........15
Trouble Diagnosis Flow Chart ................................. 15 MAIN LINE BETWEEN ADP AND HVAC CIR-
O
Trouble Diagnosis Procedure .................................. 15 CUIT .................................................................. 37
CAN Diagnosis Procedure ...............................................37

HOW TO USE THIS MANUAL ..................... 20 MAIN LINE BETWEEN ADP AND A-BAG P
CIRCUIT ............................................................ 38
HOW TO USE THIS SECTION ...........................20 Diagnosis Procedure ...............................................38
Caution .................................................................... 20
Abbreviation List ...................................................... 20 MAIN LINE BETWEEN A-BAG AND HVAC
CIRCUIT ............................................................ 39
Diagnosis Procedure ...............................................39

Revision: October 2008 LAN-1 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIR- Diagnosis Procedure ............................................... 59
CUIT ................................................................... 40
Diagnosis Procedure .............................................. 40
A-BAG BRANCH LINE CIRCUIT ...................... 60
Diagnosis Procedure ............................................... 60
MAIN LINE BETWEEN DLC AND ABS CIR-
HVAC BRANCH LINE CIRCUIT ........................ 61
CUIT ................................................................... 41
Diagnosis Procedure ............................................... 61
Diagnosis Procedure .............................................. 41
STRG BRANCH LINE CIRCUIT ........................ 62
ECM BRANCH LINE CIRCUIT .......................... 42
Diagnosis Procedure ............................................... 62
Diagnosis Procedure .............................................. 42
BCM BRANCH LINE CIRCUIT .......................... 63
ADP BRANCH LINE CIRCUIT .......................... 43
Diagnosis Procedure ............................................... 63
Diagnosis Procedure .............................................. 43
DLC BRANCH LINE CIRCUIT .......................... 64
A-BAG BRANCH LINE CIRCUIT ...................... 44
Diagnosis Procedure ............................................... 64
Diagnosis Procedure .............................................. 44
M&A BRANCH LINE CIRCUIT .......................... 65
AV BRANCH LINE CIRCUIT ............................. 45
Diagnosis Procedure ............................................... 65
Diagnosis Procedure .............................................. 45
ABS BRANCH LINE CIRCUIT .......................... 66
HVAC BRANCH LINE CIRCUIT ........................ 46
Diagnosis Procedure ............................................... 66
Diagnosis Procedure .............................................. 46
TCM BRANCH LINE CIRCUIT .......................... 67
STRG BRANCH LINE CIRCUIT ........................ 47
Diagnosis Procedure ............................................... 67
Diagnosis Procedure .............................................. 47
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IPDM-E BRANCH LINE CIRCUIT ..................... 68

BCM BRANCH LINE CIRCUIT .......................... 48
Diagnosis Procedure ............................................... 68
Diagnosis Procedure .............................................. 48
CAN COMMUNICATION CIRCUIT ................... 69
DLC BRANCH LINE CIRCUIT ........................... 49
Diagnosis Procedure ............................................... 69
Diagnosis Procedure .............................................. 49
CAN SYSTEM (TYPE 2)
M&A BRANCH LINE CIRCUIT .......................... 50
Diagnosis Procedure .............................................. 50 COMPONENT DIAGNOSIS ....................... 71

ABS BRANCH LINE CIRCUIT .......................... 51 MAIN LINE BETWEEN ADP AND A-BAG
Diagnosis Procedure .............................................. 51 CIRCUIT ............................................................. 71
Diagnosis Procedure ............................................... 71
TCM BRANCH LINE CIRCUIT .......................... 52
Diagnosis Procedure .............................................. 52 MAIN LINE BETWEEN A-BAG AND HVAC
CIRCUIT ............................................................. 72
IPDM-E BRANCH LINE CIRCUIT ..................... 53 Diagnosis Procedure ............................................... 72
Diagnosis Procedure .............................................. 53
MAIN LINE BETWEEN HVAC AND DLC CIR-
CAN COMMUNICATION CIRCUIT .................... 54 CUIT ................................................................... 73
Diagnosis Procedure .............................................. 54 Diagnosis Procedure ............................................... 73
CAN SYSTEM (TYPE 1)
MAIN LINE BETWEEN DLC AND ABS CIR-
COMPONENT DIAGNOSIS ........................ 56 CUIT ................................................................... 74
Diagnosis Procedure ............................................... 74
MAIN LINE BETWEEN A-BAG AND HVAC
CIRCUIT ............................................................. 56 ECM BRANCH LINE CIRCUIT .......................... 75
Diagnosis Procedure .............................................. 56 Diagnosis Procedure ............................................... 75

MAIN LINE BETWEEN HVAC AND DLC CIR- ADP BRANCH LINE CIRCUIT .......................... 76
CUIT ................................................................... 57 Diagnosis Procedure ............................................... 76
Diagnosis Procedure .............................................. 57
A-BAG BRANCH LINE CIRCUIT ...................... 77
MAIN LINE BETWEEN DLC AND ABS CIR- Diagnosis Procedure ............................................... 77
CUIT ................................................................... 58
Diagnosis Procedure .............................................. 58
HVAC BRANCH LINE CIRCUIT ........................ 78
Diagnosis Procedure ............................................... 78
ECM BRANCH LINE CIRCUIT .......................... 59
Revision: October 2008 LAN-2 2009 Maxima
 STRG BRANCH LINE CIRCUIT .........................79 ABS BRANCH LINE CIRCUIT .......................... 99
Diagnosis Procedure ............................................... 79 Diagnosis Procedure ...............................................99 A

BCM BRANCH LINE CIRCUIT ..........................80 TCM BRANCH LINE CIRCUIT ........................ 100
Diagnosis Procedure ............................................... 80 Diagnosis Procedure ............................................. 100
B
DLC BRANCH LINE CIRCUIT ...........................81 IPDM-E BRANCH LINE CIRCUIT ................... 101
Diagnosis Procedure ............................................... 81 Diagnosis Procedure ............................................. 101
C
M&A BRANCH LINE CIRCUIT ..........................82 CAN COMMUNICATION CIRCUIT ................. 102
Diagnosis Procedure ............................................... 82 Diagnosis Procedure ............................................. 102
CAN SYSTEM (TYPE 4)
ABS BRANCH LINE CIRCUIT ...........................83 D
Diagnosis Procedure ............................................... 83 COMPONENT DIAGNOSIS ....................... 104
TCM BRANCH LINE CIRCUIT ...........................84 MAIN LINE BETWEEN ADP AND A-BAG E
Diagnosis Procedure ............................................... 84 CIRCUIT .......................................................... 104
IPDM-E BRANCH LINE CIRCUIT ......................85 Diagnosis Procedure ............................................. 104
Diagnosis Procedure ............................................... 85 MAIN LINE BETWEEN A-BAG AND HVAC F
CAN COMMUNICATION CIRCUIT ....................86 CIRCUIT .......................................................... 105
Diagnosis Procedure ............................................... 86 Diagnosis Procedure ............................................. 105
G
CAN SYSTEM (TYPE 3) MAIN LINE BETWEEN HVAC AND DLC CIR-
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CUIT ................................................................ 106

COMPONENT DIAGNOSIS ......................... 88
Diagnosis Procedure ............................................. 106 H
MAIN LINE BETWEEN A-BAG AND HVAC
MAIN LINE BETWEEN DLC AND ABS CIR-
CIRCUIT .............................................................88
CUIT ................................................................ 107
Diagnosis Procedure ............................................... 88 I
Diagnosis Procedure ............................................. 107
MAIN LINE BETWEEN HVAC AND DLC CIR-
ECM BRANCH LINE CIRCUIT ....................... 108
CUIT ....................................................................89 Diagnosis Procedure ............................................. 108
Diagnosis Procedure ............................................... 89 J
ADP BRANCH LINE CIRCUIT ........................ 109
MAIN LINE BETWEEN DLC AND ABS CIR- Diagnosis Procedure ............................................. 109
CUIT ....................................................................90 K
Diagnosis Procedure ............................................... 90 A-BAG BRANCH LINE CIRCUIT .................... 110
Diagnosis Procedure ............................................. 110
ECM BRANCH LINE CIRCUIT ...........................91
Diagnosis Procedure ............................................... 91 AV BRANCH LINE CIRCUIT .......................... 111 L
Diagnosis Procedure ............................................. 111
A-BAG BRANCH LINE CIRCUIT .......................92
Diagnosis Procedure ............................................... 92 HVAC BRANCH LINE CIRCUIT ..................... 112 LAN
Diagnosis Procedure ............................................. 112
AV BRANCH LINE CIRCUIT ..............................93
Diagnosis Procedure ............................................... 93 STRG BRANCH LINE CIRCUIT ..................... 113
Diagnosis Procedure ............................................. 113 N
HVAC BRANCH LINE CIRCUIT ........................94
Diagnosis Procedure ............................................... 94 BCM BRANCH LINE CIRCUIT ....................... 114
Diagnosis Procedure ............................................. 114
STRG BRANCH LINE CIRCUIT .........................95 O
Diagnosis Procedure ............................................... 95 DLC BRANCH LINE CIRCUIT ........................ 115
Diagnosis Procedure ............................................. 115
BCM BRANCH LINE CIRCUIT ..........................96 P
Diagnosis Procedure ............................................... 96 M&A BRANCH LINE CIRCUIT ....................... 116
Diagnosis Procedure ............................................. 116
DLC BRANCH LINE CIRCUIT ...........................97
Diagnosis Procedure ............................................... 97 ABS BRANCH LINE CIRCUIT ........................ 117
Diagnosis Procedure ............................................. 117
M&A BRANCH LINE CIRCUIT ..........................98
Diagnosis Procedure ............................................... 98 TCM BRANCH LINE CIRCUIT ........................ 118
Diagnosis Procedure ............................................. 118

Revision: October 2008 LAN-3 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT ................... 119 COMPONENT DIAGNOSIS ...................... 135
Diagnosis Procedure .............................................119
MAIN LINE BETWEEN ADP AND HVAC CIR-
CAN COMMUNICATION CIRCUIT .................. 120 CUIT .................................................................. 135
Diagnosis Procedure .............................................120 Diagnosis Procedure ............................................. 135
CAN SYSTEM (TYPE 5)
MAIN LINE BETWEEN HVAC AND DLC CIR-
COMPONENT DIAGNOSIS ....................... 122 CUIT .................................................................. 136
Diagnosis Procedure ............................................. 136
MAIN LINE BETWEEN HVAC AND DLC CIR-
CUIT ................................................................. 122 MAIN LINE BETWEEN DLC AND ABS CIR-
Diagnosis Procedure .............................................122 CUIT .................................................................. 137
Diagnosis Procedure ............................................. 137
MAIN LINE BETWEEN DLC AND ABS CIR-
CUIT ................................................................. 123 ECM BRANCH LINE CIRCUIT ......................... 138
Diagnosis Procedure .............................................123 Diagnosis Procedure ............................................. 138

ECM BRANCH LINE CIRCUIT ........................ 124 ADP BRANCH LINE CIRCUIT ......................... 139
Diagnosis Procedure .............................................124 Diagnosis Procedure ............................................. 139

HVAC BRANCH LINE CIRCUIT ...................... 125 HVAC BRANCH LINE CIRCUIT ....................... 140
Diagnosis Procedure .............................................125 Diagnosis Procedure ............................................. 140

STRG BRANCH LINE CIRCUIT ...................... 126 STRG BRANCH LINE CIRCUIT ....................... 141
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Diagnosis Procedure .............................................126 Diagnosis Procedure ............................................. 141

BCM BRANCH LINE CIRCUIT ........................ 127 BCM BRANCH LINE CIRCUIT ......................... 142
Diagnosis Procedure .............................................127 Diagnosis Procedure ............................................. 142

DLC BRANCH LINE CIRCUIT ......................... 128 DLC BRANCH LINE CIRCUIT ......................... 143
Diagnosis Procedure .............................................128 Diagnosis Procedure ............................................. 143

M&A BRANCH LINE CIRCUIT ........................ 129 M&A BRANCH LINE CIRCUIT ......................... 144
Diagnosis Procedure .............................................129 Diagnosis Procedure ............................................. 144

ABS BRANCH LINE CIRCUIT ........................ 130 ABS BRANCH LINE CIRCUIT ......................... 145
Diagnosis Procedure .............................................130 Diagnosis Procedure ............................................. 145

TCM BRANCH LINE CIRCUIT ........................ 131 TCM BRANCH LINE CIRCUIT ......................... 146
Diagnosis Procedure .............................................131 Diagnosis Procedure ............................................. 146

IPDM-E BRANCH LINE CIRCUIT ................... 132 IPDM-E BRANCH LINE CIRCUIT .................... 147
Diagnosis Procedure .............................................132 Diagnosis Procedure ............................................. 147

CAN COMMUNICATION CIRCUIT .................. 133 CAN COMMUNICATION CIRCUIT .................. 148
Diagnosis Procedure .............................................133 Diagnosis Procedure ............................................. 148
CAN SYSTEM (TYPE 6)

Revision: October 2008 LAN-4 2009 Maxima

 PRECAUTIONS
< PRECAUTION > [CAN FUNDAMENTAL]

PRECAUTION A
PRECAUTIONS
Precautions for Trouble Diagnosis INFOID:0000000004221510
B
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. C
• Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when
checking the harness.
D
Precautions for Harness Repair INFOID:0000000004221511

• Solder the repaired area and wrap tape around the soldered area.
NOTE: E
A fray of twisted lines must be within 110 mm (4.33 in).

G
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SKIB8766E

H
• Bypass connection is never allowed at the repaired area.
NOTE:
Bypass connection may cause CAN communication error. The I
spliced wire becomes separated and the characteristics of twisted
line are lost.
J

K
SKIB8767E

L
• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica-
tion line.

LAN

Revision: October 2008 LAN-5 2009 Maxima

 CAN COMMUNICATION SYSTEM
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]

FUNCTION DIAGNOSIS
CAN COMMUNICATION SYSTEM
System Description INFOID:0000000004221512

• 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:0000000004221513
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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".

Revision: October 2008 LAN-6 2009 Maxima

 CAN COMMUNICATION SYSTEM
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
CAN Communication Control Circuit INFOID:0000000004221514

SKIB8713E F

Component System description

CAN controller It controls CAN communication signal transmission and reception, error detection, etc. G
It converts digital signal into CAN communication signal, and CAN communication signal into digital
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Transceiver IC
signal.
Noise filter It eliminates noise of CAN communication signal. H
Termination circuit* It produces potential difference.
(Resistance of approx. 120 Ω)
I
*: These are the only control units wired with both ends of CAN communication system.

LAN

Revision: October 2008 LAN-7 2009 Maxima

 DIAG ON CAN
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
DIAG ON CAN
Description INFOID:0000000004221515

“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:0000000004221516
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SKIB8714E

Name Harness Description

Tx
DDL1 It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)
Rx
DDL2 K-LINE It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)
CAN-H
Diag on CAN It is used for trouble diagnosis and control.
CAN-L

Revision: October 2008 LAN-8 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
A
Condition of Error Detection INFOID:0000000004221517

“U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-III if CAN communication signal is B

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) C
• 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 “U1000” OR “U1001” IS INDICATED EVEN THOUGH CAN COMMUNICATION SYSTEM IS D
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 E
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). F
• 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. G
NOTE:
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CAN communication system is normal if “U1000” or “U1001” is indicated on SELF-DIAG RESULTS of CON-
SULT-III under the above conditions. Erase the memory of the self-diagnosis of each unit. H
Symptom When Error Occurs in CAN Communication System INFOID:0000000004221518

In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit I
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 J
NOTE:
• Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.
• Refer to LAN-20, "Abbreviation List" for the unit abbreviation.
K
Example: TCM branch line open circuit

LAN

SKIB8738E

Unit name Symptom

ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.

Revision: October 2008 LAN-9 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
Unit name Symptom
EPS control unit Normal operation.
• Shift position indicator and OD OFF indicator turn OFF.
Combination meter
• Warning lamps turn ON.
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

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SKIB8739E

Unit name Symptom

ECM
BCM
EPS control unit
Combination meter Normal operation.
ABS actuator and electric unit (control unit)
TCM
IPDM E/R
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-III 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.
Most of the units which are connected to the CAN communication
CAN-H, CAN-L harness short-circuit
system enter fail-safe mode or are deactivated.

Revision: October 2008 LAN-10 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
Example: Main Line Between Data Link Connector and ABS Actuator and Electric Unit (Control Unit) Open Circuit
A

SKIB8740E F

Unit name Symptom

ECM Engine torque limiting is affected, and shift harshness increases. G
• Reverse warning chime does not sound.
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BCM • The front wiper moves under continuous operation mode even though the front wip-
er switch being in the intermittent position.
H
EPS control unit The steering effort increases.
• The shift position indicator and OD OFF indicator turn OFF.
Combination meter • The speedometer is inoperative.
I
• The odo/trip meter stops.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation. J
When the ignition switch is ON,
IPDM E/R • The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.
K
Example: CAN-H, CAN-L Harness Short Circuit

LAN

SKIB8741E

Revision: October 2008 LAN-11 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]

Unit name Symptom

• Engine torque limiting is affected, and shift harshness increases.
ECM
• 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.
BCM
• The engine does not start (if an error or malfunction occurs while turning the igni-
tion switch OFF.)
• The steering lock does not release (if an error or malfunction occurs while turning
the ignition switch OFF.)
EPS control unit The steering effort increases.
• The tachometer and the speedometer do not move.
Combination meter • Warning lamps turn ON.
• Indicator lamps do not turn ON.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
When the ignition switch is ON,
IPDM E/R • The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.

CAN Diagnosis with CONSULT-III

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INFOID:0000000004221519

CAN diagnosis on CONSULT-III 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:0000000004221520

Self-diagnosis item
DTC DTC detection condition Inspection/Action
(CONSULT-III indication)
When ECM is not transmitting or receiving CAN com-
U0101 LOST COMM (TCM) munication signal of OBD (emission-related diagnosis)
from TCM for 2 seconds or more.
When ECM is not transmitting or receiving CAN com-
U0164 LOST COMM (HVAC) munication signal of OBD (emission-related diagnosis)
from A/C auto amp. for 2 seconds or more.
Start the inspection. Refer
When a control unit (except for ECM) is not transmitting
to the applicable section of
U1000 CAN COMM CIRCUIT or receiving CAN communication signal for 2 seconds
the indicated control unit.
or more.
When ECM is not transmitting or receiving CAN com-
U1001 CAN COMM CIRCUIT munication signal other than OBD (emission-related di-
agnosis) for 2 seconds or more.
When a control unit is not transmitting or receiving CAN
U1002 SYSTEM COMM
communication signal for 2 seconds or less.
U1010 CONTROL UNIT(CAN) Replace the control unit in-
When an error is detected during the initial diagnosis for
dicating “U1010” or
P0607 ECM CAN controller of each control unit.
“P0607”.

CAN Diagnostic Support Monitor INFOID:0000000004221521

MONITOR ITEM (CONSULT-III)

Revision: October 2008 LAN-12 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
Example: CAN DIAG SUPPORT MNTR indication
A

JSMIA0015GB F
Without PAST

Item PRSNT Description G

OK Normal at present
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Initial diagnosis
NG Control unit error (Except for some control units)
H
OK Normal at present
Transmission diagnosis Unable to transmit signals for 2 seconds or more.
UNKWN
Diagnosis not performed I
OK Normal at present

Control unit name Unable to receive signals for 2 seconds or more.

(Reception diagnosis) J
UNKWN Diagnosis not performed
No control unit for receiving signals. (No applicable optional parts)

With PAST K

Item PRSNT PAST Description

OK Normal at present and in the past L

OK Normal at present, but unable to transmit signals for 2 seconds or more

Transmission diagnosis 1 – 39 in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.) LAN
UNKWN 0 Unable to transmit signals for 2 seconds or more at present.
OK Normal at present and in the past
N
OK Normal at present, but unable to receive signals for 2 seconds or more
1 – 39 in the past. (The number indicates the number of ignition switch cycles
Control unit name from OFF to ON.)
(Reception diagnosis) O
UNKWN 0 Unable to receive signals for 2 seconds or more at present.
Diagnosis not performed.
– –
No control unit for receiving signals. (No applicable optional parts)
P
MONITOR ITEM (ON-BOARD DIAGNOSIS)
NOTE:
For some models, CAN communication diagnosis result is received from the vehicle monitor.

Revision: October 2008 LAN-13 2009 Maxima

 TROUBLE DIAGNOSIS
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
Example: Vehicle Display
Result indi-
Item Error counter Description
cated
OK 0 Normal at present
CAN_COMM Control unit error
(Initial diagnosis) NG 1 – 50 (The number indicates how many times diagnosis has been
run.)
OK 0 Normal at present
CAN_CIRC_1 Unable to transmit for 2 seconds or more at present.
(Transmission diagnosis) UNKWN 1 – 50 (The number indicates how many times diagnosis has been
run.)
OK 0 Normal at present
Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
CAN_CIRC_2 – 9 run.)
(Reception diagnosis of each unit) UNKWN 1 – 50
Diagnosis not performed.
No control unit for receiving signals. (No applicable optional
parts)

How to Use CAN Communication Signal Chart INFOID:0000000004221522

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

SKIB8715E

Revision: October 2008 LAN-14 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN FUNDAMENTAL]

BASIC INSPECTION A
DIAGNOSIS AND REPAIR WORKFLOW
Trouble Diagnosis Flow Chart INFOID:0000000004221523
B

G
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L
JSMIA0016GB

Trouble Diagnosis Procedure INFOID:0000000004221524

LAN

INTERVIEW WITH CUSTOMER

Interview with the customer is important to detect the root cause of CAN communication system errors and to N
understand vehicle condition and symptoms for proper trouble diagnosis.
Points in interview
O
• What: Parts name, system name
• When: Date, Frequency
• Where: Road condition, Place
• In what condition: Driving condition/environment P
• 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 fail-
safe mode.

Revision: October 2008 LAN-15 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN FUNDAMENTAL]
• 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.
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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-III does not automatically recognize CAN system type.
• There are two styles for CAN system type specification charts. Depending on the number of available sys-
tem types, either style A or style B may be used.
CAN System Type Specification Chart (Style A)
NOTE:

Revision: October 2008 LAN-16 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN FUNDAMENTAL]
CAN system type is easily checked with the vehicle equipment identification information shown in the chart.
A

G
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L
JSMIA0017GB

CAN System Type Specification Chart (Style B) LAN

NOTE:

Revision: October 2008 LAN-17 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN FUNDAMENTAL]
CAN system type is easily checked with the vehicle equipment identification information shown in the chart.
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JSMIA0018GB

CREATE INTERVIEW SHEET

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

Revision: October 2008 LAN-18 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN FUNDAMENTAL]
Interview Sheet (Example)
A

G
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L
JSMIA0019GB

DETECT THE ROOT CAUSE LAN

CAN diagnosis function of CONSULT-III detects the root cause.

Revision: October 2008 LAN-19 2009 Maxima

 HOW TO USE THIS SECTION
< HOW TO USE THIS MANUAL > [CAN]

HOW TO USE THIS MANUAL

HOW TO USE THIS SECTION
Caution INFOID:0000000003899134

• 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:0000000003899135

Unit name abbreviations in CONSULT-III 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
ProCarManuals.com

HVAC A/C auto amp.

IPDM-E IPDM E/R
M&A Combination meter
STRG Steering angle sensor
TCM TCM

Revision: October 2008 LAN-20 2009 Maxima

 PRECAUTIONS
< PRECAUTION > [CAN]

PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT B
PRE-TENSIONER" INFOID:0000000004291504

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C
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. D
Information necessary to service the system safely is included in the “SRS AIRBAG” and “SEAT BELT” of this
Service Manual.
WARNING: E
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
F
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser- G
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
ProCarManuals.com

connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS H
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the igni-
tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a I
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 J
battery, and wait at least 3 minutes before performing any service.
Precautions for Trouble Diagnosis INFOID:0000000003899137

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.
L
• Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when
checking the harness.
Precautions for Harness Repair INFOID:0000000003899138
LAN
• 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). N

P
SKIB8766E

Revision: October 2008 LAN-21 2009 Maxima

 PRECAUTIONS
< PRECAUTION > [CAN]
• 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.

SKIB8767E

• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica-
tion line.
ProCarManuals.com

Revision: October 2008 LAN-22 2009 Maxima

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [CAN]

BASIC INSPECTION A
DIAGNOSIS AND REPAIR WORKFLOW
Interview Sheet INFOID:0000000003899139
B

G
ProCarManuals.com

LAN

SKIB8898E

Revision: October 2008 LAN-23 2009 Maxima

 CAN COMMUNICATION SYSTEM
< FUNCTION DIAGNOSIS > [CAN]

FUNCTION DIAGNOSIS
CAN COMMUNICATION SYSTEM
CAN System Specification Chart INFOID:0000000004019095

Determine CAN system type from the following specification chart.

NOTE:
Refer to LAN-15, "Trouble Diagnosis Procedure" for how to use CAN system specification chart.

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 1 2 3 4 5 6
×: Applicable
ProCarManuals.com

VEHICLE EQUIPMENT IDENTIFICATION INFORMATION

NOTE:
Check CAN system type from the vehicle shape and equipment.

AWMIA1102GB

CAN Communication Signal Chart INFOID:0000000004173639

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" for the abbreviations of the connecting units.
T: Transmit R: Receive
IPDM-E
STRG
HVAC
ECM

BCM

TCM
M&A
ADP

ABS
AV

Signal name/Connecting unit

A/C compressor request signal T R

Accelerator pedal position signal T R R
ASCD CRUISE indicator signal T R
ASCD SET indicator signal T R
Closed throttle position signal T R

Revision: October 2008 LAN-24 2009 Maxima

 CAN COMMUNICATION SYSTEM
< FUNCTION DIAGNOSIS > [CAN]

IPDM-E
STRG
HVAC
ECM

BCM

M&A

TCM
ADP

ABS
A

AV
Signal name/Connecting unit

Cooling fan speed request signal T R

T R
B
Engine and CVT integrated control signal
R T
Engine coolant temperature signal T R R R R R R C
Engine speed signal T R R R R R
Engine status signal T R
T R D
Fuel consumption monitor signal
R T
Malfunction indicator lamp signal T R
E
Power generation command value signal T R
T R T
System setting signal
R T R F
T R
A/C control signal
R T
G
A/C switch signal R T T
ProCarManuals.com

Blower fan motor switch signal R T T

Steering angle sensor signal T R H
Buzzer output signal T R
Cornering lamp request signal T R
I
Day time running light request signal R T R
Door lock/unlock status signal R T
Door switch signal R R T R R J
Front fog light request signal R T R R
Front wiper request signal R T R R
High beam request signal R T R R R K
Horn chirp signal T R
R T R
Ignition switch signal L
R T
Key fob door unlock signal R T
Key fob ID signal R T LAN
Key switch signal R T
Key warning signal T R
N
Low beam request signal R T R
T R
Oil pressure switch signal
R R T O
Position light request signal R T R R R
Rear window defogger switch signal R T R
P
Sleep wake up signal R T R R
Stop lamp switch signal T R
Theft warning horn request signal T R
Trunk switch signal R T R
Turn indicator signal R T R R
Distance to empty signal R T

Revision: October 2008 LAN-25 2009 Maxima

 CAN COMMUNICATION SYSTEM
< FUNCTION DIAGNOSIS > [CAN]

IPDM-E
STRG
HVAC
ECM

BCM

M&A

TCM
ADP

ABS
AV
Signal name/Connecting unit

Fuel level low warning signal R T

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 R T
Not manual mode signal T R

Paddle shifter shift down signal* T R

Paddle shifter shift up signal* T R

Parking brake switch signal R R T R
Seat belt buckle switch signal R T
R T
Sleep-ready signal
R T
R R R R T R
Vehicle speed signal
R R T R
ProCarManuals.com

ABS operation signal T R

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 T R
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 R R R R R T
R range signal R R R R R T
Shift position signal R T
A/C compressor feedback signal R T
Cooling fan speed signal R T
Control device (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
Low beam status signal R R T
Push-button ignition switch status signal R T
R T R
Rear window defogger control signal
R R R T
Steering lock unit status signal R T
*: Models with paddle shifter
NOTE:
CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.

Revision: October 2008 LAN-26 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]

COMPONENT DIAGNOSIS A
CAN COMMUNICATION SYSTEM
Component Parts Location INFOID:0000000003899142
B

G
AWMIA1101ZZ
ProCarManuals.com

1. ABS actuator and electric unit (con- 2. TCM F15 3. ECM E10
trol unit) E26 H
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 I
M46: Without NAVI
M139: With NAVI
J

LAN

Revision: October 2008 LAN-27 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]
Wiring Diagram - CAN SYSTEM - INFOID:0000000003899143
ProCarManuals.com

ABMWA0002GB

Revision: October 2008 LAN-28 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]

G
ProCarManuals.com

LAN

ABMWA0003GB

Revision: October 2008 LAN-29 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]
ProCarManuals.com

ABMIA0002GB

Revision: October 2008 LAN-30 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]

G
ProCarManuals.com

LAN

ABMIA0003GB

Revision: October 2008 LAN-31 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]
ProCarManuals.com

ABMIA0004GB

Revision: October 2008 LAN-32 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]

G
ProCarManuals.com

LAN

ABMIA0005GB

Revision: October 2008 LAN-33 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]
ProCarManuals.com

ABMIA0006GB

Revision: October 2008 LAN-34 2009 Maxima

 CAN COMMUNICATION SYSTEM
< COMPONENT DIAGNOSIS > [CAN]

G
ProCarManuals.com

LAN

ABMIA0007GB

Revision: October 2008 LAN-35 2009 Maxima

 MALFUNCTION AREA CHART
< COMPONENT DIAGNOSIS > [CAN]
MALFUNCTION AREA CHART
Main Line INFOID:0000000003899144

Malfunction Area Reference

Main line between driver seat control unit and A/C auto amp. LAN-37, "Diagnosis Procedure"
Main line between driver seat control unit and air bag diagnosis sensor unit LAN-38, "Diagnosis Procedure"
Main line between air bag diagnosis sensor unit and A/C auto amp. LAN-39, "Diagnosis Procedure"
Main line between A/C auto amp. and data link connector LAN-40, "Diagnosis Procedure"
Main line between data link connector and ABS actuator and electric unit (control unit) LAN-41, "Diagnosis Procedure"

Branch Line INFOID:0000000003899145

Malfunction Area Reference

ECM branch line circuit LAN-42, "Diagnosis Procedure"
Driver seat control unit branch line circuit LAN-43, "Diagnosis Procedure"
Air bag diagnosis sensor unit branch line circuit LAN-44, "Diagnosis Procedure"
AV control unit branch line circuit LAN-45, "Diagnosis Procedure"
ProCarManuals.com

A/C auto amp. branch line circuit LAN-46, "Diagnosis Procedure"

Steering angle sensor branch line circuit LAN-47, "Diagnosis Procedure"
BCM branch line circuit LAN-48, "Diagnosis Procedure"
Data link connector branch line circuit LAN-49, "Diagnosis Procedure"
Combination meter branch line circuit LAN-50, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-51, "Diagnosis Procedure"
TCM branch line circuit LAN-52, "Diagnosis Procedure"
IPDM E/R branch line circuit LAN-53, "Diagnosis Procedure"

Short Circuit INFOID:0000000003899146

Malfunction Area Reference

CAN communication circuit LAN-54, "Diagnosis Procedure"

Revision: October 2008 LAN-36 2009 Maxima

 MAIN LINE BETWEEN ADP AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
MAIN LINE BETWEEN ADP AND HVAC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004230608

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 D
- Harness connector M6
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
F
1. Disconnect the following harness connectors.
- Harness connectors B208 and B32
- Harness connectors B1 and M6
2. Check the continuity between the harness connectors. G
ProCarManuals.com

Harness connector Harness connector

Continuity H
Connector No. Terminal No. Connector No. Terminal No.
9 15J Existed
B32 B1
10 16J Existed
I
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1. J
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/C auto amp.
2. Check the continuity between the harness connector and the A/C auto amp. harness connector. K

Harness connector A/C auto amp. harness connector

Continuity L
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
LAN
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 A/C auto N
amp.
NO >> Repair the main line between the harness connector M6 and the A/C auto amp.
O

Revision: October 2008 LAN-37 2009 Maxima

 MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
Diagnosis Procedure INFOID:0000000004234990

INSPECTION PROCEDURE
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.
ProCarManuals.com

Harness connector Harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
9 15J Existed
B32 B1
10 16J Existed
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/C auto amp.
2. Check the continuity between the harness connector and the A/C auto amp. harness connector.

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
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 air bag
diagnosis sensor unit.
NO >> Repair the main line between the harness connector M6 and the air bag diagnosis sensor unit.

Revision: October 2008 LAN-38 2009 Maxima

 MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004230979

INSPECTION PROCEDURE B
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF. C
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- Models without automatic drive positioner
• Harness connectors E30 and M1 D
• A/C auto amp.
- Models with automatic drive positioner
• Harness connectors B1 and M6 E
• A/C auto amp.
4. Check the continuity between the harness connector and the A/C auto amp. harness connector.
- Models without automatic drive positioner
F
Harness connector A/C auto amp. harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
G
51G 1 Existed
M1 M37
ProCarManuals.com

52G 2 Existed
- Models with automatic drive positioner H

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No. I
15J 1 Existed
M6 M37
16J 2 Existed
J
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 A/C
K
auto amp.
NO >> Repair the main line between the air bag diagnosis sensor unit and the A/C auto amp.

LAN

Revision: October 2008 LAN-39 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
Diagnosis Procedure INFOID:0000000003899147

INSPECTION PROCEDURE
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 A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22
2 14 Existed
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 data link connec-
tor.
ProCarManuals.com

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

Revision: October 2008 LAN-40 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
A
Diagnosis Procedure INFOID:0000000004019324

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 D
- Harness connector E30
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
F
1. Disconnect the harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

G
Continuity
ProCarManuals.com

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

6 15G Existed H
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3. I
NO >> Repair the main line between the data link connector and the harness connector M1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) J
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.
K
ABS actuator and electric unit (control unit)
Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No. L
15G 26 Existed
E30 E26
8G 15 Existed
LAN
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 ABS actuator N
and electric unit (control unit).
NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit
(control unit).
O

Revision: October 2008 LAN-41 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
ECM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000003899148

INSPECTION PROCEDURE
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 con-
nector 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
ProCarManuals.com

1. Disconnect the connector of ECM.

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

ECM harness connector

Resistance (Ω)
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-143, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-42 2009 Maxima

 ADP BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
ADP BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004217833

1.CHECK CONNECTOR B
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 con- C
nector side).
- Driver seat control unit
- Harness connector B208
D
- Harness connector B32
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of driver seat control unit. F
2. Check the resistance between the driver seat control unit harness connector terminals.

Driver seat control unit harness connector G

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

B203 1 17 Approx. 54 – 66
H
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.
I
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-46, "DRIVER SEAT
CONTROL UNIT : Diagnosis Procedure". J
Is the inspection result normal?
YES (Present error)>>Replace the driver seat control unit. Refer to ADP-193, "Removal and Installation".
YES (Past error)>>Error was detected in the driver seat control unit branch line. K
NO >> Repair the power supply and the ground circuit.

LAN

Revision: October 2008 LAN-43 2009 Maxima

 A-BAG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
A-BAG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000003899149

1.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.
ProCarManuals.com

Revision: October 2008 LAN-44 2009 Maxima

 AV BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
AV BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000003899150

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F
- Models without NAVI

AV control unit harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

M46 86 87 Approx. 54 – 66
- Models with NAVI H

AV control unit harness connector

Resistance (Ω)
Connector No. Terminal No. I
M139 96 97 Approx. 54 – 66
Is the measurement value within the specification?
J
YES >> GO TO 3.
NO >> Repair the AV control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K
Check the power supply and the ground circuit of the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-218, "AV CONTROL UNIT : Diagnosis Procedure"
• Models with BOSE audio with navigation: AV-399, "AV CONTROL UNIT : Diagnosis Procedure" L
Is the inspection result normal?
YES (Present error)>>Replace the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-313, "Removal and Installation" LAN
• Models with BOSE audio with navigation: AV-485, "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.
N

Revision: October 2008 LAN-45 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004019329

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

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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-63, "A/C AUTO AMP. : Diagnosis Procedure"
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-46 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
STRG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000003899154

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

Steering angle sensor harness connector

Resistance (Ω)
Connector No. Terminal No. G
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal? J
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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.
K

LAN

Revision: October 2008 LAN-47 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000003899151

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M19 79 78 Approx. 54 – 66
ProCarManuals.com

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-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-48 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
DLC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000003899152

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
F
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66 G
Is the measurement value within the specification?
ProCarManuals.com

YES (Present error)>>Check CAN system type decision again.

YES (Past error)>>Error was detected in the data link connector branch line circuit. H
NO >> Repair the data link connector branch line.

LAN

Revision: October 2008 LAN-49 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
M&A BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000003899153

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.
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-144, "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: October 2008 LAN-50 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
ABS BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000003899155

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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 termi- F
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

E26 26 15 Approx. 54 – 66
Is the measurement value within the specification? H
YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-79, "Wiring Diagram".
J
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "Exploded
View".
K
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.

LAN

Revision: October 2008 LAN-51 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000003899156

INSPECTION PROCEDURE
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 con-
nector 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

ProCarManuals.com

Resistance (Ω)
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-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-52 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
IPDM-E BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000003899157

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

IPDM E/R harness connector

Resistance (Ω)
Connector No. Terminal No. G
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "Removal and Installation". J
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-53 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure INFOID:0000000003899158

INSPECTION PROCEDURE
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

Continuity
Connector No. Terminal No.
M22 6 14 Not existed
Is the inspection result normal?
ProCarManuals.com

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

Continuity
Connector No. Terminal No.
Ground
6 Not existed
M22
14 Not existed
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
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
Resistance (Ω)
Terminal No.
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals.

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E

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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-54 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. A
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is B
detected.
6.CHECK UNIT REPRODUCTION
C
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. D
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 E
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result F
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
G
ProCarManuals.com

LAN

Revision: October 2008 LAN-55 2009 Maxima

 MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]

COMPONENT DIAGNOSIS
MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
Diagnosis Procedure INFOID:0000000004236932

INSPECTION PROCEDURE
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.
- Models without automatic drive positioner
• Harness connectors E30 and M1
• A/C auto amp.
- Models with automatic drive positioner
• Harness connectors B1 and M6
• A/C auto amp.
4. Check the continuity between the harness connector and the A/C auto amp. harness connector.
- Models without automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
ProCarManuals.com

51G 1 Existed
M1 M37
52G 2 Existed
- Models with automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
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 A/C
auto amp.
NO >> Repair the main line between the air bag diagnosis sensor unit and the A/C auto amp.

Revision: October 2008 LAN-56 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236934

INSPECTION PROCEDURE B
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF. C
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- ECM
- A/C auto amp. D
4. Check the continuity between the A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector E

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22 F
2 14 Existed
Is the inspection result normal?
YES (Present error)>>Check CAN system type decision again. G
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the data link connec-
tor.
ProCarManuals.com

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

LA N

Revision: October 2008 LAN-57 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
Diagnosis Procedure INFOID:0000000004236935

INSPECTION PROCEDURE
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 harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

Continuity
ProCarManuals.com

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

6 15G Existed
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the data link connector 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.

ABS actuator and electric unit (control unit)

Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
15G 26 Existed
E30 E26
8G 15 Existed
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 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: October 2008 LAN-58 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
ECM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236936

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 con-
nector side).
- Models without automatic drive positioner D
• ECM
• Harness connector E30
• Harness connector M1 E
- Models with automatic drive positioner
• ECM
• Harness connector E29
• Harness connector B10 F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector. G
2.CHECK HARNESS FOR OPEN CIRCUIT
ProCarManuals.com

1. Disconnect the connector of ECM. H

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

ECM harness connector

Resistance (Ω) I
Connector No. Terminal No.
E10 98 97 Approx. 108 – 132
Is the measurement value within the specification? J
YES >> GO TO 3.
NO >> Repair the ECM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K

Check the power supply and the ground circuit of the ECM. Refer to EC-143, "Diagnosis Procedure".
Is the inspection result normal? L
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line. LAN
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-59 2009 Maxima

 A-BAG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
A-BAG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236938

1.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.
ProCarManuals.com

Revision: October 2008 LAN-60 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
HVAC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236940

1.CHECK CONNECTOR B
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 C
side and connector side).
Is the inspection result normal?
YES >> GO TO 2. D
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
E
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 F

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
G
Is the measurement value within the specification?
ProCarManuals.com

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line. H
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-63, "A/C AUTO AMP. : Diagnosis Procedure" I
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color J
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit. K

LAN

Revision: October 2008 LAN-61 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
STRG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236941

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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: October 2008 LAN-62 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
BCM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236942

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of BCM.
2. Check the resistance between the BCM harness connector terminals. F

BCM harness connector

Resistance (Ω)
Connector No. Terminal No. G
M19 79 78 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the BCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the BCM. Refer to BCS-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation". J
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-63 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
DLC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236943

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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.

Revision: October 2008 LAN-64 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
M&A BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236944

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of combination meter.
2. Check the resistance between the combination meter harness connector terminals. F

Combination meter harness connector

Resistance (Ω)
Connector No. Terminal No. G
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the combination meter branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
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? J
YES (Present error)>>Replace the combination meter. Refer to MWI-144, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-65 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
ABS BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236945

INSPECTION PROCEDURE
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 termi-
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

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.
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-79, "Wiring Diagram".
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "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: October 2008 LAN-66 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
TCM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236946

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 con-
nector side).
- TCM D
- Harness connector F1
- Harness connector E3
Is the inspection result normal? E
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT F
1. Disconnect the connector of TCM.
2. Check the resistance between the TCM harness connector terminals.
G
TCM harness connector
ProCarManuals.com

Resistance (Ω)
Connector No. Terminal No.
H
F15 32 31 Approx. 54 – 66
Is the measurement value within the specification?
YES >> GO TO 3. I
NO >> Repair the TCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
J
Check the power supply and the ground circuit of the TCM. Refer to TM-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
K
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.
L

LAN

Revision: October 2008 LAN-67 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
IPDM-E BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236947

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "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: October 2008 LAN-68 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
CAN COMMUNICATION CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236948

INSPECTION PROCEDURE B
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.
F
Data link connector
Continuity
Connector No. Terminal No.
M22 6 14 Not existed G
Is the inspection result normal?
ProCarManuals.com

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

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

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

Data link connector

Continuity
Connector No. Terminal No. J
Ground
6 Not existed
M22
14 Not existed
K
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
L
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. LAN

ECM
Resistance (Ω)
Terminal No. N
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals. O

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E P
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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-69 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
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.
ProCarManuals.com

Revision: October 2008 LAN-70 2009 Maxima

 MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]

COMPONENT DIAGNOSIS A
MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
Diagnosis Procedure INFOID:0000000004236952
B

INSPECTION PROCEDURE
1.CHECK CONNECTOR C
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 D
and harness side).
- Harness connector B1
- Harness connector M6 E
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector. F
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- Harness connectors B208 and B32 G
- Harness connectors B1 and M6
ProCarManuals.com

2. Check the continuity between the harness connectors.

H
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
9 15J Existed I
B32 B1
10 16J Existed
Is the inspection result normal? J
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) K
1. Disconnect the connector of A/C auto amp.
2. Check the continuity between the harness connector and the A/C auto amp. harness connector.
L
Harness connector A/C auto amp. harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed LAN
M6 M37
16J 2 Existed
Is the inspection result normal? N
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 air bag
diagnosis sensor unit.
NO >> Repair the main line between the harness connector M6 and the air bag diagnosis sensor unit. O

Revision: October 2008 LAN-71 2009 Maxima

 MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
Diagnosis Procedure INFOID:0000000004236953

INSPECTION PROCEDURE
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.
- Models without automatic drive positioner
• Harness connectors E30 and M1
• A/C auto amp.
- Models with automatic drive positioner
• Harness connectors B1 and M6
• A/C auto amp.
4. Check the continuity between the harness connector and the A/C auto amp. harness connector.
- Models without automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
51G 1 Existed
M1 M37
ProCarManuals.com

52G 2 Existed
- Models with automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
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 A/C
auto amp.
NO >> Repair the main line between the air bag diagnosis sensor unit and the A/C auto amp.

Revision: October 2008 LAN-72 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236955

INSPECTION PROCEDURE B
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF. C
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- ECM
- A/C auto amp. D
4. Check the continuity between the A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector E

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22 F
2 14 Existed
Is the inspection result normal?
YES (Present error)>>Check CAN system type decision again. G
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the data link connec-
tor.
ProCarManuals.com

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

LA N

Revision: October 2008 LAN-73 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
Diagnosis Procedure INFOID:0000000004236956

INSPECTION PROCEDURE
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 harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

Continuity
ProCarManuals.com

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

6 15G Existed
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the data link connector 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.

ABS actuator and electric unit (control unit)

Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
15G 26 Existed
E30 E26
8G 15 Existed
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 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: October 2008 LAN-74 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
ECM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236957

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 con-
nector side).
- Models without automatic drive positioner D
• ECM
• Harness connector E30
• Harness connector M1 E
- Models with automatic drive positioner
• ECM
• Harness connector E29
• Harness connector B10 F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector. G
2.CHECK HARNESS FOR OPEN CIRCUIT
ProCarManuals.com

1. Disconnect the connector of ECM. H

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

ECM harness connector

Resistance (Ω) I
Connector No. Terminal No.
E10 98 97 Approx. 108 – 132
Is the measurement value within the specification? J
YES >> GO TO 3.
NO >> Repair the ECM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K

Check the power supply and the ground circuit of the ECM. Refer to EC-143, "Diagnosis Procedure".
Is the inspection result normal? L
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line. LAN
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-75 2009 Maxima

 ADP BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
ADP BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236958

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 con-
nector 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

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

B203 1 17 Approx. 54 – 66
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-46, "DRIVER SEAT
CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the driver seat control unit. Refer to ADP-193, "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: October 2008 LAN-76 2009 Maxima

 A-BAG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
A-BAG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236959

1.CHECK AIR BAG DIAGNOSIS SENSOR UNIT B

Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow".
Is the inspection result normal?
C
YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.

G
ProCarManuals.com

LAN

Revision: October 2008 LAN-77 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236961

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

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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-63, "A/C AUTO AMP. : Diagnosis Procedure"
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-78 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
STRG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236962

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

Steering angle sensor harness connector

Resistance (Ω)
Connector No. Terminal No. G
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal? J
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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.
K

LAN

Revision: October 2008 LAN-79 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236963

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M19 79 78 Approx. 54 – 66
ProCarManuals.com

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-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-80 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
DLC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236964

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
F
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66 G
Is the measurement value within the specification?
ProCarManuals.com

YES (Present error)>>Check CAN system type decision again.

YES (Past error)>>Error was detected in the data link connector branch line circuit. H
NO >> Repair the data link connector branch line.

LAN

Revision: October 2008 LAN-81 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
M&A BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236965

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.
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-144, "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: October 2008 LAN-82 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
ABS BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236966

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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 termi- F
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

E26 26 15 Approx. 54 – 66
Is the measurement value within the specification? H
YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-79, "Wiring Diagram".
J
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "Exploded
View".
K
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.

LAN

Revision: October 2008 LAN-83 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236967

INSPECTION PROCEDURE
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 con-
nector 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

ProCarManuals.com

Resistance (Ω)
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-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-84 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
IPDM-E BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236968

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

IPDM E/R harness connector

Resistance (Ω)
Connector No. Terminal No. G
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "Removal and Installation". J
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-85 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure INFOID:0000000004236969

INSPECTION PROCEDURE
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

Continuity
Connector No. Terminal No.
M22 6 14 Not existed
Is the inspection result normal?
ProCarManuals.com

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

Continuity
Connector No. Terminal No.
Ground
6 Not existed
M22
14 Not existed
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
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
Resistance (Ω)
Terminal No.
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals.

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E

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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-86 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. A
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is B
detected.
6.CHECK UNIT REPRODUCTION
C
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. D
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 E
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result F
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
G
ProCarManuals.com

LAN

Revision: October 2008 LAN-87 2009 Maxima

 MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]

COMPONENT DIAGNOSIS
MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
Diagnosis Procedure INFOID:0000000004236832

INSPECTION PROCEDURE
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.
- Models without automatic drive positioner
• Harness connectors E30 and M1
• A/C auto amp.
- Models with automatic drive positioner
• Harness connectors B1 and M6
• A/C auto amp.
4. Check the continuity between the harness connector and the A/C auto amp. harness connector.
- Models without automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
ProCarManuals.com

51G 1 Existed
M1 M37
52G 2 Existed
- Models with automatic drive positioner

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
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 A/C
auto amp.
NO >> Repair the main line between the air bag diagnosis sensor unit and the A/C auto amp.

Revision: October 2008 LAN-88 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236834

INSPECTION PROCEDURE B
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF. C
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- ECM
- A/C auto amp. D
4. Check the continuity between the A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector E

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22 F
2 14 Existed
Is the inspection result normal?
YES (Present error)>>Check CAN system type decision again. G
YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the data link connec-
tor.
ProCarManuals.com

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

LA N

Revision: October 2008 LAN-89 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
Diagnosis Procedure INFOID:0000000004236835

INSPECTION PROCEDURE
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 harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

Continuity
ProCarManuals.com

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

6 15G Existed
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the data link connector 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.

ABS actuator and electric unit (control unit)

Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
15G 26 Existed
E30 E26
8G 15 Existed
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 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: October 2008 LAN-90 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
ECM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236836

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 con-
nector side).
- Models without automatic drive positioner D
• ECM
• Harness connector E30
• Harness connector M1 E
- Models with automatic drive positioner
• ECM
• Harness connector E29
• Harness connector B10 F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector. G
2.CHECK HARNESS FOR OPEN CIRCUIT
ProCarManuals.com

1. Disconnect the connector of ECM. H

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

ECM harness connector

Resistance (Ω) I
Connector No. Terminal No.
E10 98 97 Approx. 108 – 132
Is the measurement value within the specification? J
YES >> GO TO 3.
NO >> Repair the ECM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K

Check the power supply and the ground circuit of the ECM. Refer to EC-143, "Diagnosis Procedure".
Is the inspection result normal? L
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line. LAN
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-91 2009 Maxima

 A-BAG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
A-BAG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236838

1.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.
ProCarManuals.com

Revision: October 2008 LAN-92 2009 Maxima

 AV BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
AV BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236839

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F
- Models without NAVI

AV control unit harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

M46 86 87 Approx. 54 – 66
- Models with NAVI H

AV control unit harness connector

Resistance (Ω)
Connector No. Terminal No. I
M139 96 97 Approx. 54 – 66
Is the measurement value within the specification?
J
YES >> GO TO 3.
NO >> Repair the AV control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K
Check the power supply and the ground circuit of the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-218, "AV CONTROL UNIT : Diagnosis Procedure"
• Models with BOSE audio with navigation: AV-399, "AV CONTROL UNIT : Diagnosis Procedure" L
Is the inspection result normal?
YES (Present error)>>Replace the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-313, "Removal and Installation" LAN
• Models with BOSE audio with navigation: AV-485, "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.
N

Revision: October 2008 LAN-93 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236840

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

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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-63, "A/C AUTO AMP. : Diagnosis Procedure"
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-94 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
STRG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236841

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

Steering angle sensor harness connector

Resistance (Ω)
Connector No. Terminal No. G
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal? J
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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.
K

LAN

Revision: October 2008 LAN-95 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236842

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M19 79 78 Approx. 54 – 66
ProCarManuals.com

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-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-96 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
DLC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236843

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
F
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66 G
Is the measurement value within the specification?
ProCarManuals.com

YES (Present error)>>Check CAN system type decision again.

YES (Past error)>>Error was detected in the data link connector branch line circuit. H
NO >> Repair the data link connector branch line.

LAN

Revision: October 2008 LAN-97 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
M&A BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236844

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.
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-144, "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: October 2008 LAN-98 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
ABS BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236845

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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 termi- F
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

E26 26 15 Approx. 54 – 66
Is the measurement value within the specification? H
YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-79, "Wiring Diagram".
J
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "Exploded
View".
K
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.

LAN

Revision: October 2008 LAN-99 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236846

INSPECTION PROCEDURE
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 con-
nector 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

ProCarManuals.com

Resistance (Ω)
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-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-100 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
IPDM-E BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236847

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

IPDM E/R harness connector

Resistance (Ω)
Connector No. Terminal No. G
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "Removal and Installation". J
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-101 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure INFOID:0000000004236848

INSPECTION PROCEDURE
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

Continuity
Connector No. Terminal No.
M22 6 14 Not existed
Is the inspection result normal?
ProCarManuals.com

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

Continuity
Connector No. Terminal No.
Ground
6 Not existed
M22
14 Not existed
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
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
Resistance (Ω)
Terminal No.
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals.

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E

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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-102 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. A
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is B
detected.
6.CHECK UNIT REPRODUCTION
C
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. D
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 E
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result F
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
G
ProCarManuals.com

LAN

Revision: October 2008 LAN-103 2009 Maxima

 MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]

COMPONENT DIAGNOSIS
MAIN LINE BETWEEN ADP AND A-BAG CIRCUIT
Diagnosis Procedure INFOID:0000000004236849

INSPECTION PROCEDURE
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
ProCarManuals.com

2. Check the continuity between the harness connectors.

Harness connector Harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
9 15J Existed
B32 B1
10 16J Existed
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/C auto amp.
2. Check the continuity between the harness connector and the A/C auto amp. harness connector.

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed
M6 M37
16J 2 Existed
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 air bag
diagnosis sensor unit.
NO >> Repair the main line between the harness connector M6 and the air bag diagnosis sensor unit.

Revision: October 2008 LAN-104 2009 Maxima

 MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
MAIN LINE BETWEEN A-BAG AND HVAC CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236850

INSPECTION PROCEDURE B
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF. C
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- Models without automatic drive positioner
• Harness connectors E30 and M1 D
• A/C auto amp.
- Models with automatic drive positioner
• Harness connectors B1 and M6 E
• A/C auto amp.
4. Check the continuity between the harness connector and the A/C auto amp. harness connector.
- Models without automatic drive positioner
F
Harness connector A/C auto amp. harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
G
51G 1 Existed
M1 M37
ProCarManuals.com

52G 2 Existed
- Models with automatic drive positioner H

Harness connector A/C auto amp. harness connector

Continuity
Connector No. Terminal No. Connector No. Terminal No. I
15J 1 Existed
M6 M37
16J 2 Existed
J
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 A/C
K
auto amp.
NO >> Repair the main line between the air bag diagnosis sensor unit and the A/C auto amp.

LAN

Revision: October 2008 LAN-105 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
Diagnosis Procedure INFOID:0000000004236852

INSPECTION PROCEDURE
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 A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22
2 14 Existed
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 data link connec-
tor.
ProCarManuals.com

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

Revision: October 2008 LAN-106 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236853

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 D
- Harness connector E30
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
F
1. Disconnect the harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

G
Continuity
ProCarManuals.com

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

6 15G Existed H
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3. I
NO >> Repair the main line between the data link connector and the harness connector M1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) J
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.
K
ABS actuator and electric unit (control unit)
Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No. L
15G 26 Existed
E30 E26
8G 15 Existed
LAN
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 ABS actuator N
and electric unit (control unit).
NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit
(control unit).
O

Revision: October 2008 LAN-107 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
ECM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236854

INSPECTION PROCEDURE
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 con-
nector 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
ProCarManuals.com

1. Disconnect the connector of ECM.

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

ECM harness connector

Resistance (Ω)
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-143, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-108 2009 Maxima

 ADP BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
ADP BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236855

1.CHECK CONNECTOR B
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 con- C
nector side).
- Driver seat control unit
- Harness connector B208
D
- Harness connector B32
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of driver seat control unit. F
2. Check the resistance between the driver seat control unit harness connector terminals.

Driver seat control unit harness connector G

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

B203 1 17 Approx. 54 – 66
H
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.
I
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-46, "DRIVER SEAT
CONTROL UNIT : Diagnosis Procedure". J
Is the inspection result normal?
YES (Present error)>>Replace the driver seat control unit. Refer to ADP-193, "Removal and Installation".
YES (Past error)>>Error was detected in the driver seat control unit branch line. K
NO >> Repair the power supply and the ground circuit.

LAN

Revision: October 2008 LAN-109 2009 Maxima

 A-BAG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
A-BAG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236856

1.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.
ProCarManuals.com

Revision: October 2008 LAN-110 2009 Maxima

 AV BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
AV BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236857

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F
- Models without NAVI

AV control unit harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

M46 86 87 Approx. 54 – 66
- Models with NAVI H

AV control unit harness connector

Resistance (Ω)
Connector No. Terminal No. I
M139 96 97 Approx. 54 – 66
Is the measurement value within the specification?
J
YES >> GO TO 3.
NO >> Repair the AV control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT K
Check the power supply and the ground circuit of the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-218, "AV CONTROL UNIT : Diagnosis Procedure"
• Models with BOSE audio with navigation: AV-399, "AV CONTROL UNIT : Diagnosis Procedure" L
Is the inspection result normal?
YES (Present error)>>Replace the AV control unit. Refer to the following.
• Models with BOSE audio without navigation: AV-313, "Removal and Installation" LAN
• Models with BOSE audio with navigation: AV-485, "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.
N

Revision: October 2008 LAN-111 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236858

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

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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-63, "A/C AUTO AMP. : Diagnosis Procedure"
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-112 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
STRG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236859

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

Steering angle sensor harness connector

Resistance (Ω)
Connector No. Terminal No. G
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal? J
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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.
K

LAN

Revision: October 2008 LAN-113 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236860

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M19 79 78 Approx. 54 – 66
ProCarManuals.com

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-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-114 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
DLC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236861

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
F
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66 G
Is the measurement value within the specification?
ProCarManuals.com

YES (Present error)>>Check CAN system type decision again.

YES (Past error)>>Error was detected in the data link connector branch line circuit. H
NO >> Repair the data link connector branch line.

LAN

Revision: October 2008 LAN-115 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
M&A BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236862

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.
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-144, "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: October 2008 LAN-116 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
ABS BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236863

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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 termi- F
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

E26 26 15 Approx. 54 – 66
Is the measurement value within the specification? H
YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-79, "Wiring Diagram".
J
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "Exploded
View".
K
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.

LAN

Revision: October 2008 LAN-117 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236864

INSPECTION PROCEDURE
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 con-
nector 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

ProCarManuals.com

Resistance (Ω)
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-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-118 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
IPDM-E BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236865

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

IPDM E/R harness connector

Resistance (Ω)
Connector No. Terminal No. G
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "Removal and Installation". J
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-119 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure INFOID:0000000004236866

INSPECTION PROCEDURE
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

Continuity
Connector No. Terminal No.
M22 6 14 Not existed
Is the inspection result normal?
ProCarManuals.com

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

Continuity
Connector No. Terminal No.
Ground
6 Not existed
M22
14 Not existed
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
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
Resistance (Ω)
Terminal No.
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals.

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E

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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-120 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. A
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is B
detected.
6.CHECK UNIT REPRODUCTION
C
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. D
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 E
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result F
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
G
ProCarManuals.com

LAN

Revision: October 2008 LAN-121 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]

COMPONENT DIAGNOSIS
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
Diagnosis Procedure INFOID:0000000004236902

INSPECTION PROCEDURE
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 A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22
2 14 Existed
Is the inspection result normal?
YES (Present error)>>Check CAN system type decision again.
ProCarManuals.com

YES (Past error)>>Error was detected in the main line between the A/C auto amp. and the data link connec-
tor.
NO >> Repair the main line between the A/C auto amp. and the data link connector.

Revision: October 2008 LAN-122 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236903

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 D
- Harness connector E30
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
F
1. Disconnect the harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

G
Continuity
ProCarManuals.com

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

6 15G Existed H
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3. I
NO >> Repair the main line between the data link connector and the harness connector M1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) J
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.
K
ABS actuator and electric unit (control unit)
Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No. L
15G 26 Existed
E30 E26
8G 15 Existed
LAN
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 ABS actuator N
and electric unit (control unit).
NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit
(control unit).
O

Revision: October 2008 LAN-123 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
ECM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236904

INSPECTION PROCEDURE
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 con-
nector 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
ProCarManuals.com

1. Disconnect the connector of ECM.

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

ECM harness connector

Resistance (Ω)
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-143, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-124 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
HVAC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236908

1.CHECK CONNECTOR B
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 C
side and connector side).
Is the inspection result normal?
YES >> GO TO 2. D
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
E
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 F

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
G
Is the measurement value within the specification?
ProCarManuals.com

YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line. H
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-63, "A/C AUTO AMP. : Diagnosis Procedure" I
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color J
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit. K

LAN

Revision: October 2008 LAN-125 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
STRG BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236909

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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: October 2008 LAN-126 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
BCM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236910

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of BCM.
2. Check the resistance between the BCM harness connector terminals. F

BCM harness connector

Resistance (Ω)
Connector No. Terminal No. G
M19 79 78 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the BCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the BCM. Refer to BCS-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation". J
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-127 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
DLC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236911

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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.

Revision: October 2008 LAN-128 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
M&A BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236912

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of combination meter.
2. Check the resistance between the combination meter harness connector terminals. F

Combination meter harness connector

Resistance (Ω)
Connector No. Terminal No. G
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the combination meter branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
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? J
YES (Present error)>>Replace the combination meter. Refer to MWI-144, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-129 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
ABS BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236913

INSPECTION PROCEDURE
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 termi-
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

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.
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-79, "Wiring Diagram".
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "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: October 2008 LAN-130 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
TCM BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236914

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 con-
nector side).
- TCM D
- Harness connector F1
- Harness connector E3
Is the inspection result normal? E
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT F
1. Disconnect the connector of TCM.
2. Check the resistance between the TCM harness connector terminals.
G
TCM harness connector
ProCarManuals.com

Resistance (Ω)
Connector No. Terminal No.
H
F15 32 31 Approx. 54 – 66
Is the measurement value within the specification?
YES >> GO TO 3. I
NO >> Repair the TCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
J
Check the power supply and the ground circuit of the TCM. Refer to TM-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
K
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.
L

LAN

Revision: October 2008 LAN-131 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
IPDM-E BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236915

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
E17 40 39 Approx. 108 – 132
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "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: October 2008 LAN-132 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
CAN COMMUNICATION CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236916

INSPECTION PROCEDURE B
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.
F
Data link connector
Continuity
Connector No. Terminal No.
M22 6 14 Not existed G
Is the inspection result normal?
ProCarManuals.com

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

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

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

Data link connector

Continuity
Connector No. Terminal No. J
Ground
6 Not existed
M22
14 Not existed
K
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
L
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. LAN

ECM
Resistance (Ω)
Terminal No. N
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals. O

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E P
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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-133 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
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.
ProCarManuals.com

Revision: October 2008 LAN-134 2009 Maxima

 MAIN LINE BETWEEN ADP AND HVAC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]

COMPONENT DIAGNOSIS A
MAIN LINE BETWEEN ADP AND HVAC CIRCUIT
Diagnosis Procedure INFOID:0000000004236882
B

INSPECTION PROCEDURE
1.CHECK CONNECTOR C
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 D
and harness side).
- Harness connector B1
- Harness connector M6 E
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector. F
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- Harness connectors B208 and B32 G
- Harness connectors B1 and M6
ProCarManuals.com

2. Check the continuity between the harness connectors.

H
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
9 15J Existed I
B32 B1
10 16J Existed
Is the inspection result normal? J
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B32 and B1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) K
1. Disconnect the connector of A/C auto amp.
2. Check the continuity between the harness connector and the A/C auto amp. harness connector.
L
Harness connector A/C auto amp. harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
15J 1 Existed LAN
M6 M37
16J 2 Existed
Is the inspection result normal? N
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 A/C auto
amp.
NO >> Repair the main line between the harness connector M6 and the A/C auto amp. O

Revision: October 2008 LAN-135 2009 Maxima

 MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
MAIN LINE BETWEEN HVAC AND DLC CIRCUIT
Diagnosis Procedure INFOID:0000000004236883

INSPECTION PROCEDURE
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 A/C auto amp. harness connector and the data link connector.

A/C auto amp. harness connector Data link connector

Continuity
Connector No. Terminal No. Connector No. Terminal No.
1 6 Existed
M37 M22
2 14 Existed
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 data link connec-
tor.
ProCarManuals.com

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

Revision: October 2008 LAN-136 2009 Maxima

 MAIN LINE BETWEEN DLC AND ABS CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236884

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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 D
- Harness connector E30
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
F
1. Disconnect the harness connectors M1 and E30.
2. Check the continuity between the data link connector and the harness connector.

Data link connector Harness connector

G
Continuity
ProCarManuals.com

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

6 15G Existed H
M22 M1
14 8G Existed
Is the inspection result normal?
YES >> GO TO 3. I
NO >> Repair the main line between the data link connector and the harness connector M1.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) J
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.
K
ABS actuator and electric unit (control unit)
Harness connector
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No. L
15G 26 Existed
E30 E26
8G 15 Existed
LAN
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 ABS actuator N
and electric unit (control unit).
NO >> Repair the main line between the harness connector E30 and the ABS actuator and electric unit
(control unit).
O

Revision: October 2008 LAN-137 2009 Maxima

 ECM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
ECM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236885

INSPECTION PROCEDURE
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 con-
nector 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
ProCarManuals.com

1. Disconnect the connector of ECM.

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

ECM harness connector

Resistance (Ω)
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-143, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to EC-13, "BASIC INSPECTION : Special Repair Require-
ment".
YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-138 2009 Maxima

 ADP BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
ADP BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236886

1.CHECK CONNECTOR B
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 con- C
nector side).
- Driver seat control unit
- Harness connector B208
D
- Harness connector B32
Is the inspection result normal?
YES >> GO TO 2. E
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of driver seat control unit. F
2. Check the resistance between the driver seat control unit harness connector terminals.

Driver seat control unit harness connector G

Resistance (Ω)
Connector No. Terminal No.
ProCarManuals.com

B203 1 17 Approx. 54 – 66
H
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the driver seat control unit branch line.
I
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-46, "DRIVER SEAT
CONTROL UNIT : Diagnosis Procedure". J
Is the inspection result normal?
YES (Present error)>>Replace the driver seat control unit. Refer to ADP-193, "Removal and Installation".
YES (Past error)>>Error was detected in the driver seat control unit branch line. K
NO >> Repair the power supply and the ground circuit.

LAN

Revision: October 2008 LAN-139 2009 Maxima

 HVAC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236889

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

Resistance (Ω)
Connector No. Terminal No.
M37 1 2 Approx. 54 – 66
Is the measurement value within the specification?
ProCarManuals.com

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-63, "A/C AUTO AMP. : Diagnosis Procedure"
• Models with monochrome display: HAC-186, "A/C AUTO AMP. : Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-123, "Removal and Installation" (with color
display) or HAC-231, "Removal and Installation" (with monochrome display).
YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-140 2009 Maxima

 STRG BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
STRG BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236890

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

Steering angle sensor harness connector

Resistance (Ω)
Connector No. Terminal No. G
M53 5 2 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-79, "Wiring Dia-
gram".
Is the inspection result normal? J
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-106, "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.
K

LAN

Revision: October 2008 LAN-141 2009 Maxima

 BCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236891

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M19 79 78 Approx. 54 – 66
ProCarManuals.com

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-41, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-87, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-142 2009 Maxima

 DLC BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
DLC BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236892

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
F
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M22 6 14 Approx. 54 – 66 G
Is the measurement value within the specification?
ProCarManuals.com

YES (Present error)>>Check CAN system type decision again.

YES (Past error)>>Error was detected in the data link connector branch line circuit. H
NO >> Repair the data link connector branch line.

LAN

Revision: October 2008 LAN-143 2009 Maxima

 M&A BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
M&A BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236893

INSPECTION PROCEDURE
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

Resistance (Ω)
Connector No. Terminal No.
M24 21 22 Approx. 54 – 66
ProCarManuals.com

Is the measurement value within the specification?

YES >> GO TO 3.
NO >> Repair the combination meter branch line.
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-144, "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: October 2008 LAN-144 2009 Maxima

 ABS BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
ABS BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236894

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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 termi- F
nals.

ABS actuator and electric unit (control unit) harness connector

Resistance (Ω) G
Connector No. Terminal No.
ProCarManuals.com

E26 26 15 Approx. 54 – 66
Is the measurement value within the specification? H
YES >> GO TO 3.
NO >> Repair the ABS actuator and electric unit (control unit) branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-79, "Wiring Diagram".
J
Is the inspection result normal?
YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to BRC-103, "Exploded
View".
K
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.

LAN

Revision: October 2008 LAN-145 2009 Maxima

 TCM BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure INFOID:0000000004236895

INSPECTION PROCEDURE
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 con-
nector 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

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Resistance (Ω)
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-122, "Wiring Diagram - CVT CON-
TROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the TCM. Refer to TM-166, "Exploded View".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.

Revision: October 2008 LAN-146 2009 Maxima

 IPDM-E BRANCH LINE CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
IPDM-E BRANCH LINE CIRCUIT
A
Diagnosis Procedure INFOID:0000000004236896

INSPECTION PROCEDURE B
1.CHECK CONNECTOR
1. Turn the ignition switch OFF. C
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? D
YES >> GO TO 2.
NO >> Repair the terminal and connector.
E
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. F

IPDM E/R harness connector

Resistance (Ω)
Connector No. Terminal No. G
E17 40 39 Approx. 108 – 132
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Is the measurement value within the specification?

YES >> GO TO 3. H
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT I
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-21, "Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-40, "Removal and Installation". J
YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
K

LAN

Revision: October 2008 LAN-147 2009 Maxima

 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure INFOID:0000000004236897

INSPECTION PROCEDURE
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

Continuity
Connector No. Terminal No.
M22 6 14 Not existed
Is the inspection result normal?
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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

Continuity
Connector No. Terminal No.
Ground
6 Not existed
M22
14 Not existed
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
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
Resistance (Ω)
Terminal No.
98 97 Approx. 108 – 132
3. Check the resistance between the IPDM E/R terminals.

IPDM E/R
Resistance (Ω)
Terminal No. LKIA0037E

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.
5.CHECK SYMPTOM
Revision: October 2008 LAN-148 2009 Maxima
 CAN COMMUNICATION CIRCUIT
< COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 6)]
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. A
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is B
detected.
6.CHECK UNIT REPRODUCTION
C
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. D
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 E
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result F
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
G
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Revision: October 2008 LAN-149 2009 Maxima