ignition INFINITI QX56 2006 Factory Service Manual

LAN-2Revision: November 20092006 QX56
Wiring Diagram — CAN — ..................................
... 98
Check Sheet ........................................................... 99 CHECK SHEET RESULTS (EXAMPLE) .......... .102
TROUBLE DIAGNOSIS FOR SYSTEM ................. .123
Inspection Between TCM and ICC Sensor Circuit .123
Inspection Between TCM and Driver Seat Control
Unit Circuit ........................................................... .124
Inspection Between ICC Sensor and ICC Unit Cir-
cuit ....................................................................... .125
Inspection Between ICC Unit and Driver Seat Con-
trol Unit Circuit ..................................................... .126
Inspection Between Driver Seat Control Unit and
Data Link Connector Circuit ................................. .126
Inspection Between Data Link Connector and ABS
Actuator and Electric Unit (Control Unit) Circuit ... .127
ECM Circuit Inspection ........................................ .128TCM Circuit Inspection .........................................
.129
ICC Sensor Circuit Inspection .............................. .129
ICC Unit Circuit Inspection ................................... .130
Driver Seat Control Unit Circuit Inspection .......... .130
Combination Meter Circuit Inspection .................. .131
Display Control Unit Circuit Inspection ................. .131
BCM Circuit Inspection ........................................ .132
Data Link Connector Circuit Inspection ................ .132
Steering Angle Sensor Circuit Inspection ............. .133
Front Air Control Circuit Inspection ...................... .133
Transfer Control Unit Circuit Inspection ............... .134
ABS Actuator and Electric Unit (Control Unit) Circuit
Inspection ............................................................. .134
IPDM E/R Circuit Inspection ................................ .135
CAN Communication Circuit Inspection ............... .135
IPDM E/R Ignition Relay Circuit Inspection .......... .137

PRECAUTIONSLAN-3
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Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UKS0017I
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions When Using CONSULT-IIUKS0017J
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
–If YES, GO TO 2.
–If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis results?
–If YES, GO TO 3.
–If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica- tion. Therefore, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
Precautions For Trouble DiagnosisUKS0017K
CAN SYSTEM

Do not apply voltage of 7.0 V or higher to the measurement terminals.

Use the tester with its open terminal voltage being 7.0 V or less.

Be sure to turn ignition switch OFF and disconnect the battery cable from the negative terminal before
checking the circuit.

LAN-34
[CAN]
CAN COMMUNICATION
Revision: November 20092006 QX56

*1: with ICC model only
High beam status signal
R T
Horn chirp signal TR
Ignition switch signal RT R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Low beam status signal R T
Position light request signal RT R
Rear window defogger switch signal TR R
Sleep wake up signal R RT R
Theft warning horn request signal TR
Tire pressure data signal R T
Tire pressure signal RT
Turn indicator signal RT
Steering angle sensor signal TR
ABS malfunction signal RT
ABS warning lamp signal RT
Brake pressure sensor signal RT
Brake warning lamp signal RT
SLIP indicator lamp signal RT
TCS malfunction signal RT
VDC malfunction signal RT
VDC OFF indicator lamp signal RR T
VDC operation signal RT
Front wiper stop position signal RT
Hood switch signal RT
Rear window defogger control signal RRT
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
ABS actuator and electric unit (control unit) IPDM E/R

CAN COMMUNICATIONLAN-37
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Revision: November 2009 2006 QX56
Fuel level low warning signalT R
Fuel level sensor signal RT
Parking brake switch signal TR
Stop lamp switch signal RTR
Tow mode switch signal RT
Vehicle speed signal RR
RT
RRR R T RR
A/C switch/indicator signal TR
RT
A/C switch signal RTR
Blower fan motor switch signal RT
Day time running light request signal TR
Door switch signal R R R TR
Front fog light request signal TR
Front wiper request signal RT R
High beam request signal RT R
High beam status signal R T
Horn chirp signal TR
Ignition switch signal RT R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Low beam status signal R T
Position light request signal RT R
Rear window defogger switch signal TR R
Sleep wake up signal R RT R
Theft warning horn request signal TR
Tire pressure data signal R T
Tire pressure signal RT
Turn indicator signal RT
Steering angle sensor signal TR
ABS malfunction signal RT
ABS warning lamp signal RT
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R

LAN-56
[CAN]
CAN SYSTEM (TYPE 1)
Revision: November 20092006 QX56
Case 16
Check IPDM E/R ignition relay circuit continuously sticks “OFF ”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
Case 17
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
PKIC3289E
PKIC3290E

LAN-78
[CAN]
CAN SYSTEM (TYPE 2)
Revision: November 20092006 QX56
Case 20
Check IPDM E/R ignition relay circuit continuously sticks “OFF ”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
Case 21
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
PKIC3538E
PKIC3539E

CAN SYSTEM (TYPE 3)LAN-97
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Revision: November 2009 2006 QX56
Case 17
Check IPDM E/R ignition relay circuit continuously sticks “OFF”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
Case 18
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
PKIC3515E
PKIC3516E

CAN SYSTEM (TYPE 4)LAN-121
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Revision: November 2009 2006 QX56
Case 20
Check CAN communication circuit. Refer to LAN-135, "CAN Communication Circuit Inspection" .
Case 21
Check IPDM E/R ignition relay circuit continuously sticks “OFF ”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
PKIC3559E
PKIC3560E

LAN-122
[CAN]
CAN SYSTEM (TYPE 4)
Revision: November 20092006 QX56
Case 22
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-137, "IPDM E/R Ignition Relay
Circuit Inspection" .
PKIC3561E

TROUBLE DIAGNOSIS FOR SYSTEMLAN-123
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Revision: November 2009 2006 QX56
TROUBLE DIAGNOSIS FOR SYSTEMPFP:00000
Inspection Between TCM and ICC Sensor CircuitUKS004TB
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
–Harness connector F14
–Harness connector E5
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect A/T assembly connector and harness connector F14.
2. Check continuity between A/T assembly harness connector (A) and harness connector (B).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check continuity between harness connector (A) and ICC sen- sor harness connector (B).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to LAN-5, "
TROUBLE DIAGNOSES WORK FLOW" .
NG >> Repair harness.
AB Continuity
Connector Terminal Connector Terminal
F9 3
F14 5 Yes
81 5Yes
PKIC3825E
AB
Continuity
Connector Terminal Connector Terminal
E5 5
E42 2 Yes
15 3Yes
PKIC3836E