Back door INFINITI QX56 2011 Factory Service Manual

LAN
SYSTEMLAN-27
< SYSTEM DESCRIPTION > [CAN]
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SYSTEM
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM : CAN
System Specification ChartINFOID:0000000006220532
Determine CAN system type from the following specification chart.
NOTE:
Refer to LAN-18, "
Trouble Diagnosis Procedure" for how to use CAN system specification chart.
×: Applicable
VEHICLE EQUIPMENT IDENTIFICATION INFORMATION
NOTE:
Body type Wagon
Axle 2WD 4WD
Engine VK56VD
Transmission A/T
Brake control VDC
ICC system ××
CAN system type 1 2 3 4 CAN communication unit
ECM ××××
Transfer control unit ××
ABS actuator and electric unit (control unit) ××××
TCM ××××
Air bag diagnosis sensor unit ××××
AFS control unit ××
AV control unit ××××
BCM ××××
CAN gateway ××
Data link connector ××××
A/C auto amp. ××××
Combination meter ××××
Steering angle sensor ××××
Low tire pressure warning control unit ××××
IPDM E/R ××××
Driver seat control unit ××××
Pre-crash seat belt control unit (driver side) ××
Air levelizer control module ××××
ADAS control unit ××
Automatic back door control module ××××
ITS communication unit
ADAS control unit ××
Side radar RH ××
Side radar LH ××
Lane camera unit ××
Accelerator pedal actuator ××
ICC sensor ××
Revision: 2010 May2011 QX56

LAN-30
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
P range signal T R R
R range signal T R R
Shift position signal R R T R R R R R
Tow mode indicator lamp
signalTR
Pre-roll over signal T R
Pre-tensioner operation
signal TR
AFS OFF indicator lamp
signal TR
A/C switch operation signal T R
Rear window defogger
switch signal TR
System selection signal T R
System setting signal TR R
RT
RT
Automatic back door re-
quest signal TR
Back door lock status signal T R
Buzzer output signal TR
RT
Buzzer request signal TR
RT
Dimmer signal T R R
Door switch signal T R R R R
Door unlock signal T R
Front fog light request sig-
nal TR
Front wiper request signal T R R
Handle position signal T R
Headlamp washer request
signal TR
High beam request signal T R R
Horn reminder signal T R
Ignition switch ON signal TRRR
RT
Ignition switch signal T R
Interlock/PNP switch signal TR
RT
Key ID signal T R
Key switch signal T R
Key warning lamp signal T R
Low beam request signal T R Signal name
ECM
4WD
ABS
TCM
A-BAG
AFSAV
BCM
CGW
HVAC
M&A
STRG
TPMS
IPDM-E ADP
PSB
E-SUS ICC
PWBD
Revision: 2010 May2011 QX56

LAN
MALFUNCTION AREA CHARTLAN-57
< DTC/CIRCUIT DIAGNOSIS > [CAN]
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DTC/CIRCUIT DIAGNOSIS
MALFUNCTION AREA CHART
System DiagramINFOID:0000000006220536
CAN Communication CircuitINFOID:0000000006220537
MAIN LINE
BRANCH LINE
JSMIA0344GB
Malfunction area Reference
Main line between ABS actuator an d electric unit (control unit)
and data link connector LAN-60, "
Diagnosis Procedure"
Main line between data link connector and air levelizer control
moduleLAN-61, "Diagnosis Procedure"
Main line between air levelizer control module and driver seat
control unit (Without ICC system)
LAN-62, "Diagnosis Procedure"
Main line between driver seat control unit and automatic back
door control module (With ICC system)LAN-63, "Diagnosis Procedure"
Revision: 2010 May2011 QX56

LAN-58
< DTC/CIRCUIT DIAGNOSIS >[CAN]
MALFUNCTION AREA CHART
SHORT CIRCUIT
ITS Communication CircuitINFOID:0000000006220538
MAIN LINE
BRANCH LINE
Malfunction area Reference
ECM branch line circuit LAN-68, "
Diagnosis Procedure"
Transfer control unit branch line circuitLAN-69, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-70, "Diagnosis Procedure"
TCM branch line circuit LAN-71, "Diagnosis Procedure"
Air bag diagnosis sensor unit branch line circuitLAN-72, "Diagnosis Procedure"
AFS control unit branch line circuitLAN-73, "Diagnosis Procedure"
AV control unit branch line circuitLAN-74, "Diagnosis Procedure"
BCM branch line circuitLAN-75, "Diagnosis Procedure"
CAN gateway branch line circuit (CAN communication circuit 1)LAN-76, "Diagnosis Procedure"
CAN gateway branch line circuit (CAN communication circuit 2)LAN-77, "Diagnosis Procedure"
Data link connector branch line circuitLAN-78, "Diagnosis Procedure"
A/C auto amp. branch line circuitLAN-79, "Diagnosis Procedure"
Combination meter branch line circuitLAN-80, "Diagnosis Procedure"
Steering angle sensor branch line circuitLAN-81, "Diagnosis Procedure"
Low tire pressure warning control unit branch line circuitLAN-82, "Diagnosis Procedure"
IPDM E/R branch line circuitLAN-83, "Diagnosis Procedure"
Driver seat control unit branch line circuitLAN-84, "Diagnosis Procedure"
Pre-crash seat belt control unit (driver side) branch line circuitLAN-85, "Diagnosis Procedure"
Air levelizer control module branch line circuitLAN-86, "Diagnosis Procedure"
ADAS control unit branch line circuitLAN-87, "Diagnosis Procedure"
Automatic back door control module branch line circuitLAN-88, "Diagnosis Procedure"
Malfunction area Reference
CAN communication circuit (Without ICC system) LAN-94, "
Diagnosis Procedure"
CAN communication circuit 1 (With ICC system)LAN-96, "Diagnosis Procedure"
CAN communication circuit 2 (With ICC system)LAN-98, "Diagnosis Procedure"
Malfunction area Reference
Main line between side radar RH and side radar LH LAN-64, "
Diagnosis Procedure"
Main line between side radar LH and lane camera unitLAN-65, "Diagnosis Procedure"
Main line between lane camera unit and accelerator pedal actu-
atorLAN-67, "Diagnosis Procedure"
Malfunction area Reference
Side radar RH branch line circuit LAN-89, "
Diagnosis Procedure"
Side radar LH branch line circuitLAN-90, "Diagnosis Procedure"
Lane camera unit branch line circuitLAN-91, "Diagnosis Procedure"
Accelerator pedal actuator branch line circuitLAN-92, "Diagnosis Procedure"
ICC sensor branch line circuitLAN-93, "Diagnosis Procedure"
Revision: 2010 May2011 QX56

LAN
MAIN LINE BETWEEN ADP AND PWBD CIRCUIT
LAN-63
< DTC/CIRCUIT DIAGNOSIS > [CAN]
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MAIN LINE BETWEEN ADP AND PWBD CIRCUIT
Diagnosis ProcedureINFOID:0000000006220540
1.CHECK HARNESS CONTI
NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect the following harness connectors.
- CAN gateway
- Harness connectors B460 and B24
- Automatic back door control module
4. Check the continuity between the harness connecto r and the automatic back door control module harness
connector.
Is the inspection result normal?
YES (Present error)>>Check CA N system type decision again.
YES (Past error)>>Error was detected in the main li ne between the driver seat control unit and the automatic
back door control module.
NO >> Repair the main line between the harness c onnector B24 and the automatic back door control
module.
Harness connector Automatic back door control module
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B24 13
B26 7 Existed
12 6 Existed
Revision: 2010 May2011 QX56

LAN-88
< DTC/CIRCUIT DIAGNOSIS >[CAN]
PWBD BRANCH LINE CIRCUIT
PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220564
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 fo r damage, bend and loose connection (unit side and con-
nector side).
- Automatic back door control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC sy stem)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CA N gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of automatic back door control module.
3. Check the resistance between the automatic ba ck door control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the automatic back door control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of t he automatic back door control module. Refer to DLK-116,
"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the automat ic back door control module. Refer to DLK-262, "Removal and
Installation".
YES (Past error)>>Error was detected in the automatic back door control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Automatic back door control module harness connector Resistance (Ω)
Connector No. Terminal No.
B26 7 6 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
PWBD BRANCH LINE CIRCUITLAN-135
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
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PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256260
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con- nector side).
- Automatic back door control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CAN gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of automatic back door control module.
3. Check the resistance between the automatic bac k door control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the automatic back door control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of t he automatic back door control module. Refer to DLK-116,
"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the automat ic back door control module. Refer to DLK-262, "Removal and
Installation".
YES (Past error)>>Error was detected in the automatic back door control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Automatic back door control module harness connector Resistance (Ω)
Connector No. Terminal No.
B26 7 6 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
MAIN LINE BETWEEN ADP AND PWBD CIRCUIT
LAN-139
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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MAIN LINE BETWEEN ADP AND PWBD CIRCUIT
Diagnosis ProcedureINFOID:0000000006256282
1.CHECK HARNESS CONTI
NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect the following harness connectors.
- CAN gateway
- Harness connectors B460 and B24
- Automatic back door control module
4. Check the continuity between the harness connecto r and the automatic back door control module harness
connector.
Is the inspection result normal?
YES (Present error)>>Check CA N system type decision again.
YES (Past error)>>Error was detected in the main li ne between the driver seat control unit and the automatic
back door control module.
NO >> Repair the main line between the harness c onnector B24 and the automatic back door control
module.
Harness connector Automatic back door control module
harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B24 13
B26 7 Existed
12 6 Existed
Revision: 2010 May2011 QX56

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PWBD BRANCH LINE CIRCUITLAN-163
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256306
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con- nector side).
- Automatic back door control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CAN gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of automatic back door control module.
3. Check the resistance between the automatic bac k door control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the automatic back door control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of t he automatic back door control module. Refer to DLK-116,
"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the automat ic back door control module. Refer to DLK-262, "Removal and
Installation".
YES (Past error)>>Error was detected in the automatic back door control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Automatic back door control module harness connector Resistance (Ω)
Connector No. Terminal No.
B26 7 6 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
PWBD BRANCH LINE CIRCUITLAN-193
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
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PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256353
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con- nector side).
- Automatic back door control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CAN gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of automatic back door control module.
3. Check the resistance between the automatic bac k door control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the automatic back door control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of t he automatic back door control module. Refer to DLK-116,
"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the automat ic back door control module. Refer to DLK-262, "Removal and
Installation".
YES (Past error)>>Error was detected in the automatic back door control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Automatic back door control module harness connector Resistance (Ω)
Connector No. Terminal No.
B26 7 6 Approx. 54 – 66
Revision: 2010 May2011 QX56