ignition INFINITI QX56 2008 Factory Service Manual

LAN
TROUBLE DIAGNOSISLAN-47
< FUNCTION DIAGNOSIS > [CAN]
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TROUBLE DIAGNOSIS
CAN Diagnostic Support MonitorINFOID:0000000001282402
Use “CAN DIAG SUPPORT MNTR” for detecting the root cause.
MONITOR ITEM LIST (CONSULT-III)
ECM
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→
ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
TCM
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
ICC Unit
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
ECM TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
VDC/TCS/ABS
Signal receivin
g status from the ABS actua-
tor and electric unit (control unit)
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
ICC Signal receiving status from the ICC unit
HVAC Not used even though indicated
TCM Signal receiving status from the TCM OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
IPDM E/R Signal receiving status from the IPDM E/R OK OK
or
1 – 39
*UNKWN 0
e4WD Not used even though indicated
AWD/4WD Signal receiving status from the transfer
control unit OKOK
or
1 – 39
*UNKWN 0
ITEM CAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
TCM INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
VDC/TCS/ABS
Signal receiving status from the ABS
actuator and electric unit (con-
trol unit)
METER/M&A Signal receiving status from the combination meter
ICC/e4WD Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: March 2010 2008 QX56

LAN-48
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
Driver Seat Control Unit
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
AV Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
BCM
ITEM CAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ICC INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving status from the ABS actuator and electric unit (con-
trol unit)
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
LANE KEEP
ECM (l)
ICC SENSOR Signal receiving status from the ICC sensor OK UNKWN
STRG
Not used even though indicated
METER/M&A (l)
ERROR (l)
LANE DETEC-
TOR
TCM (l)
BCM/SEC Signal receiving status from the BCM
OK UNKWN
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
ADP TRANSMIT DIAG
Not used even though indicated
METER/M&A Signal receiving status from the combina-
tion meter
OKOK
or
1 – 39
*UNKWN 0
BCM/SEC Signal receiving status from the BCM
TCM Signal receiving status from the TCM
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
AV TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
HVAC Signal receiving status from the A/C auto
amp.
STRG Not used even though indicated
IPDM E/R Signal receiving status from the IPDM E/R OK OK
or
1 – 39
*UNKWN 0
TIRE-P Not used even though indicated
Revision: March 2010 2008 QX56

LAN
TROUBLE DIAGNOSISLAN-49
< FUNCTION DIAGNOSIS > [CAN]
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NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
A/C Auto Amp.
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→
ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Intelligent Key Unit
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Combination Meter
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
BCM INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
IPDM E/R Signal receiving status from the IPDM E/R
METER/M&A Signal receiving status from the combination meter
I-KEY Not used even though indicated
ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
HVAC TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM Signal receiving status from the ECM
TCM Not used even though indicated
BCM/SEC Signal receiving status from the BCM OKOK
or
1 – 39
*UNKWN 0
VDC/TCS/ABS Signal receivin
g status from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Not used even though indicated
DISPLAY Signal receiving status from the AV control
unit
OKOK
or
1 – 39
*UNKWN 0
I-KEY
Not used even though indicated
EPS
AWD/4WD
e4WD
ICC
LANE KEEP
TIRE-P
ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
I-KEY TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
METER/M&A Signal receiving status from the combina-
tion meter
BCM/SEC Signal receiving status from the BCM
Revision: March 2010 2008 QX56

LAN-50
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Transfer Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
ABS Actuator and Electric Unit (Control Unit)
CAUTION:ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
M&A TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
TCM Signal receiving status from the TCM
BCM/SEC Signal receiving status from the BCM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Signal receiving status from the IPDM E/R
DISPLAY Not used even though indicated
I-KEY Signal receiving status from the Intelligent
Key unit
OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
AWD/4WD
e4WD
ICC Signal receiving status from the ICC unit OK OK
or
1 – 39
*UNKWN 0
LANE KEEP Not used even though indicated
TIRE-P
ITEM CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
4WD TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
TCM Signal receiving status from the TCM
STRG Signal receiving status from the steering an-
gle sensor
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ABS INITIAL DIAG Status of CAN controller
OKNG
Caution
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
STRG Signal receiving status from the steering angle sensor
OK UNKWN
ICC Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: March 2010 2008 QX56

LAN
TROUBLE DIAGNOSISLAN-51
< FUNCTION DIAGNOSIS > [CAN]
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Never replace the unit even when “NG” is indicated on the “INITIAL DIAG” at this stage. Fo
llow the trouble diagnosis proce-
dures.
IPDM E/R
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→ ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
DTC IndexINFOID:0000000001282403
ITEMCAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
IPDM-E TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM Signal receiving status from the ECM
BCM/SEC Signal receiving status from the BCM
DTC Self-diagnosis item
(CONSULT-III indication) DTC detection condition
Inspection
U1000 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission-related diagnosis)
for 2 seconds or more.
Refer to LAN-36
.
When a control unit (except for ECM) is not transmitting
or receiving CAN communication signal for 2 seconds
or more.
U1001 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN com-
munication signal other than OBD (emission-related di-
agnosis) for 2 seconds or more.
U1002 SYSTEM COMM When a control unit is not transmitting or receiving CAN
communication signal for 2 seconds or less. Start the inspection. Refer
to the applicable section
of the indicated control
unit.
U1010 CONTROL UNIT [CAN] When an error is detected during the initial diagnosis for
CAN controller of each control unit. Replace the control unit
indicating “U1010”.
Revision: March 2010
2008 QX56

LAN
MAIN LINE BETWEEN TCM AND ADP CIRCUITLAN-61
< COMPONENT DIAGNOSIS > [CAN]
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MAIN LINE BETWEEN TCM AND ADP CIRCUIT
Diagnosis ProcedureINFOID:0000000001297547
INSPECTION PROCEDURE
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 (connector side
and harness side).
- Harness connector F14
- Harness connector E5
- Harness connector E34
- Harness connector B40
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- A/T assembly
- Harness connectors F14 and E5
2. Check the continuity between the A/T asse mbly harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors E34 and B40.
2. Check the continuity between the harness connectors.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the main line between the harness connectors E5 and E34.
4.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors B37 and B200.
2. Check the continuity between the harness connectors.
Is the inspection result normal?
YES (Present error)>>Check the following items again.
A/T assembly harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
F9 3
F14 5
Existed
8 15Existed
Harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E5 5
E34 24
Existed
15 23Existed
Harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B40 24
B37 15
Existed
23 14Existed
Revision: March 2010 2008 QX56

LAN
MAIN LINE BETWEEN TCM AND LASER CIRCUITLAN-63
< COMPONENT DIAGNOSIS > [CAN]
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MAIN LINE BETWEEN TC
M AND LASER CIRCUIT
Diagnosis ProcedureINFOID:0000000001282441
INSPECTION PROCEDURE
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 (connector side
and harness side).
- Harness connector F14
- Harness connector E5
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- A/T assembly
- Harness connectors F14 and E5
2. Check the continuity between the A/T asse mbly harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor.
2. Check the continuity between the harness connector and the ICC sensor harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the A/T assembly and the ICC sensor.
NO >> Repair the main line between the harness connector E5 and the ICC sensor.
A/T assembly harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
F9 3
F14 5
Existed
8 15Existed
Harness connector ICC sensor harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E5 5
E42 2
Existed
15 3Existed
Revision: March 2010 2008 QX56

LAN-64
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEEN LASER AND ICC CIRCUIT
MAIN LINE BETWEEN LA
SER AND ICC CIRCUIT
Diagnosis ProcedureINFOID:0000000001282444
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 E34
- Harness connector B40
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ICC sensor
- Harness connectors E34 and B40
2. Check the continuity between the ICC sens or harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the ICC sensor and the harness connector E34.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC unit.
2. Check the continuity between the harness connector and the ICC unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the ma in line between the ICC sensor and the ICC unit.
NO >> Repair the main line between the harness connector B40 and the ICC unit.
ICC sensor harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E42 2
E34 24
Existed
3 23Existed
Harness connector ICC unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B40 24
B13 14
Existed
23 5Existed
Revision: March 2010 2008 QX56

LAN
MAIN LINE BETWEEN ICC AND ADP CIRCUITLAN-65
< COMPONENT DIAGNOSIS > [CAN]
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MAIN LINE BETWEEN ICC AND ADP CIRCUIT
Diagnosis ProcedureINFOID:0000000001282446
INSPECTION PROCEDURE
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.
-ECM
- ICC unit
- Harness connectors B37 and B200
4. Check the continuity between the ICC unit harness connector and the harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main li ne between the ICC unit and the driver seat control unit.
NO >> Repair the main line between t he ICC unit and the harness connector B37.
ICC unit harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B13 14
B37 15
Existed
5 14Existed
Revision: March 2010 2008 QX56

LAN-66
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEE
N ADP AND AV CIRCUIT
MAIN LINE BETWEEN ADP AND AV CIRCUIT
Diagnosis ProcedureINFOID:0000000001282447
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 B69
- Harness connector M40
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- Harness connectors B200 and B37
- Harness connectors B69 and M40
2. Check the continuity bet ween the harness connectors.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B37 and B69.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of AV control unit.
2. Check the continuity between the harness conn ector and the AV control unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the driver seat control unit and the AV control
unit.
NO >> Repair the main line between the harness connector M40 and the AV control unit.
Harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B37 15
B69 51J
Existed
14 52JExisted
Harness connector AV control unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M40 51J
M45 96
Existed
52J 97Existed
Revision: March 2010 2008 QX56