INFINITI QX56 2011 Factory Service Manual

SEC-114
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26F5 STEERING LOCK STATUS SWITCH
NO >> GO TO 2.
2.CHECK IPDM E/R INPUT SIGNAL CIRCUIT
1. Disconnect IPDM E/R connector and steering lock unit connector.
2. Check continuity between IPDM E/R harness connector and steering lock unit harness connector.
3. Check continuity between IP DM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.REPLACE STEERING LOCK UNIT
1. Replace steering lock unit.
2. Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.
>> INSPECTION END
4.CHECK BCM INPUT SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM harness connector and ground.
NOTE:
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 6.
5.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
IPDM E/R Steering lock unit
Continuity
Connector Terminal Connector Terminal
E17 63
M12 8
Existed
65 3
IPDM E/R GroundContinuity
Connector Terminal
E17 63
Not existed
65
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M71 107
Ground Steering lock unit Lock 0
Unlock 12
108 Lock 12
Unlock 0
To lock the steering 1. Set the selector lever in the P position.
2. Turn the power supply position to the OFF position.
3. Press any door switch.
To unlock the steering 1. Set the selector lever in the P position.
2. Press the push-button ignition switch with brake pedal not depressed.
Revision: 2010 May2011 QX56

B26F5 STEERING LOCK STATUS SWITCHSEC-115
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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>> INSPECTION END
6.CHECK BCM INPUT SIGNAL CIRCUIT
1. Disconnect BCM connector and steering lock unit connector.
2. Check continuity between BCM harness connector and steering lock unit harness connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace harness.
7.REPLACE STEERING LOCK UNIT
1. Replace steering lock unit.
2. Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.
>> INSPECTION END
BCM Steering lock unit Continuity
Connector Terminal Connector Terminal
M71 107
M12 3
Existed
108 8
BCM GroundContinuity
Connector Terminal
M71 107
Not existed
108
Revision: 2010 May2011 QX56

SEC-116
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26F7 BCM
B26F7 BCM
DTC LogicINFOID:0000000006226272
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press door request switch.
2. Turn ignition switch ON.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-117, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226273
1.INSPECTION START
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC CONFIRMATION PROC EDURE for DTC B26F7. Refer to SEC-116, "
DTC Logic".
Is DTC detected?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B26F7 BCM Inside key antenna output circuit in BCM is malfunctioning. BCM
Revision: 2010 May2011 QX56

B26F8 BCMSEC-117
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B26F8 BCM
DTC LogicINFOID:0000000006226274
DTC DETECTION LOGIC
NOTE:
DTC B26F8 can be detected even though the relat ed circuit is not used in this vehicle.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait 1 second.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-117, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226275
1.INSPECTION START
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” mode of ”BCM” using CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC CONFIRMATION PROCEDURE for DTC B26F8. Refer to SEC-117, "
DTC Logic".
Is DTC detected?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B26F8 BCM Starter control replay control signal and feedback circuit
signal (inside BCM) does not match. BCM
Revision: 2010 May2011 QX56

SEC-118
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26F9 CRANKING REQUEST CIRCUIT
B26F9 CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226276
DTC DETECTION LOGIC
NOTE:
 DTC B26F9 can be detected even though the rela
ted circuit is not used in this vehicle.
 If DTC B26F9 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to BCS-70, "
DTC Logic".
 If DTC B26F9 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
1. Start engine and wait 2 seconds or more at idle speed.
2. Drive vehicle for 2 seconds or more.
3. Check DTC in “Self Diagnostic Result ” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-118, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226277
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect ECM connector.
4. Check continuity between BCM harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26F9 CRANK REQ CIR SHORT BCM detects that the status of the following
signals does not match.
 Cranking request signal from ECM
 Starter control relay control signal from
ECM (CAN)  Harness or connectors
(Can communication line is open or
shorted.)
 Harness or connectors (Cranking request signal circuit is open
or shorted.)
ECM
BCM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M69 64 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

B26F9 CRANKING REQUEST CIRCUITSEC-119
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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5. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
3. Perform DTC CONFIRMATION PROCEDURE for DTC B26F9. Refer to SEC-118, "
DTC Logic".
Is DTC detected?
YES >> GO TO 4.
NO >> INSPECTION END
4.REPLACE ECM
1. Replace ECM. Refer to EC-535, "
Removal and Installation".
2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to EC-143, "
Work Procedure".
>> INSPECTION END
BCM ECM Continuity
Connector Terminal Connector Terminal
M69 64 E80 165 Existed
BCM GroundContinuity
Connector Terminal
M69 64 Not existed
Revision: 2010 May2011 QX56

SEC-120
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26FA CRANKING REQUEST CIRCUIT
B26FA CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226278
DTC DETECTION LOGIC
NOTE:
 DTC B26FA can be detected even though the related circuit is not used in this vehicle.
 If DTC B26FA is displayed with DTC U1000, first
perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26FA is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
1. Start engine and wait 2 seconds or more at idle speed.
2. Drive vehicle for 2 seconds or more.
3. Check DTC in “Self Diagnostic Result ” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-120, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226279
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect ECM connector.
4. Check continuity between BCM harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26FA CRANK REQ CIR OPEN BCM detects that the status of the following
signals does not match.
 Cranking request signal from ECM
 Starter control relay
control signal from
ECM (CAN)  Harness or connectors
(Can communication line is open or
shorted.)
 Harness or connectors (Cranking request signal circuit is open
or shorted.)
BCM
ECM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M69 64 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56

B26FA CRANKING REQUEST CIRCUITSEC-121
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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5. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
3. Perform DTC CONFIRMATION PROCEDURE for DTC B26FA. Refer to SEC-120, "
DTC Logic".
Is DTC detected?
YES >> GO TO 4.
NO >> INSPECTION END
4.REPLACE ECM
1. Replace ECM. Refer to EC-535, "
Removal and Installation".
2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to EC-143, "
Work Procedure".
>> INSPECTION END
BCM ECM Continuity
Connector Terminal Connector Terminal
M69 64 E80 165 Existed
BCM GroundContinuity
Connector Terminal
M69 64 Not existed
Revision: 2010 May2011 QX56

SEC-122
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B26FC KEY REGISTRATION
B26FC KEY REGISTRATION
DTC LogicINFOID:0000000006226280
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Perform initialization of BCM and reregistration of all Intelligent Keys using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-122, "Diagnosis Procedure"
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226281
1.REPLACE INTELLIGENT KEY
1. Prepare Intelligent Key that matches the vehicle.
2. Perform initialization of BCM and registration of Intelligent Key using CONSULT-III. For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26FC KEY REGISTRATION Intelligent Key that does not match the vehicle is
registered.  Improper registra
tion operation
 Intelligent Key
BCM
Revision: 2010 May2011 QX56

B209F CRANKING REQUEST CIRCUITSEC-123
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B209F CRANKING REQUEST CIRCUIT
DTC LogicINFOID:0000000006226282
DTC DETECTION LOGIC
NOTE:
 DTC B209F can be detected even though the rela ted circuit is not used in this vehicle.
 If DTC B209F is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
PCS-28, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait 1 second or more at idle speed.
2. Drive vehicle for 1 second or more.
3. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-123, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226283
1.CHECK CRANKING REQUEST SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R harness connector and ground under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CRANKING REQUEST SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Disconnect ECM connector.
4. Check continuity between IPDM E/R harness connector and ECM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B209F CRANK REQ CIR OPEN When the following items do not match, a
malfunction is detected.
 Cranking request signal from ECM
 Starter contro
l relay control signal from
ECM (CAN)  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors
(Cranking request signal circuit is open
or shorted.)
IPDM E/R
ECM
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E13 23 Ground Ignition switch ON  Engine: Stopped
 Selector lever position: P
0
 Engine: Stopped
 Selector lever position: Other than P 12
Engine running 12
Revision: 2010 May2011 QX56