INFINITI QX56 2011 Factory Service Manual

SEC-84
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2602 SHIFT POSITION
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace A/T shift selector. Refer to
TM-176, "
Removal and Installation".
A/T shift selector (detention switch)
Condition Continuity
Te r m i n a l
13 14 Selector lever P position Not existed
Other than above Existed
Revision: 2010 May2011 QX56

B2603 SHIFT POSITIONSEC-85
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2603 SHIFT POSITION
DTC LogicINFOID:0000000006226236
DTC DETECTION LOGIC
NOTE:
 If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. Refer to SEC-79, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE 1
1. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 1 second or more.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-85, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE 2
1. Shift the selector lever to any positi on other than P, and wait 1 second or more.
2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-85, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226237
1.INSPECTION START
Perform inspection in accordance with procedure that confirms DTC.
Which procedure confirms DTC?
DTC confirmation procedure 1>>GO TO 2.
DTC confirmation procedure 2>>GO TO 6.
2.CHECK DTC OF TCM
Check DTC in “Self Diagnostic Result ” mode of “TCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to TM-78, "DTC Index".
NO >> GO TO 3.
3.CHECK BCM INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible causes
B2603 SHIFT POSI STATUS BCM detects the following status when ignition
switch is in the ON position.
 P position signal from TCM: approx. 0 V
 A/T shift selector (detention switch) signal:
approx. 0 V  Harness or connector
[A/T shift selector (detention switch)
circuit is open or shorted.]
 Harness or connectors (TCM circuit is open or shorted.)
 A/T shift selector (detention switch)
 A/T assembly (TCM)
BCM
Revision: 2010 May2011 QX56

SEC-86
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2603 SHIFT POSITION
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 5.
4.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
5.CHECK BCM INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect A/T assembly connector.
4. Check continuity between A/T assembly harness connector and BCM harness connector.
5. Check continuity between A/T assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace harness.
6.CHECK A/T SHIFT SELECTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/T shift selector (detention switch) connector.
3. Check voltage between A/T shift selector (detention switch) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 7.
7.CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between A/T shift selector ( detention switch) harness connector and BCM harness con-
nector.
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M71 102 Ground Selector lever P or N position 12
Other than above 0
A/T assembly BCM Continuity
Connector Terminal Connector Terminal
F51 9 M71 102 Existed
A/T assembly GroundContinuity
Connector Terminal
F51 9 Not existed
(+) (–)Voltage (V)
(Approx.)
A/T shift selector (detention switch)
Connector Terminal M57 13Ground12
Revision: 2010 May2011 QX56

B2603 SHIFT POSITIONSEC-87
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between A/T shift select or (detention switch) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace harness.
8.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
9.CHECK A/T SHIFT SELECTOR CIRCUIT
1. Disconnect BCM connector and IPDM E/R connector.
2. Check continuity between A/T shift selector ( detention switch) harness connector and BCM harness con-
nector.
3. Check continuity between A/T shift select or (detention switch) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace harness.
10.CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)
Refer to SEC-87, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace A/T shift selector. Refer to TM-176, "
Removal and Installation".
11 .CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006226238
1.CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)
1. Turn ignition switch OFF.
2. Disconnect A/T shift selector connector.
3. Check continuity between A/T shift selector (detention switch) terminals.
A/T shift selector (detention switch) BCM
Continuity
Connector Terminal Connector Terminal
M57 13 M71 104 Existed
A/T shift selector (detention switch) GroundContinuity
Connector Terminal
M57 13 Not existed
A/T shift selector (detention switch) BCM Continuity
Connector Terminal Connector Terminal
M57 14 M68 37 Existed
A/T shift selector (detention switch) GroundContinuity
Connector Terminal
M57 14 Not existed
Revision: 2010 May2011 QX56

SEC-88
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2603 SHIFT POSITION
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace A/T shift selector. Refer to
TM-176, "
Removal and Installation".
A/T shift selector (detention switch)
Condition Continuity
Te r m i n a l
13 14 Selector lever P position Not existed
Other than above Existed
Revision: 2010 May2011 QX56

B2604 SHIFT POSITIONSEC-89
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2604 SHIFT POSITION
DTC LogicINFOID:0000000006226239
DTC DETECTION LOGIC
NOTE:
 If DTC B2604 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2604 is displayed with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 5 seconds or more.
3. Shift the selector lever to the N position and wait 5 seconds or more.
4. Shift the selector lever to any position ot her than P and N, and wait 5 seconds or more.
5. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-89, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226240
1.CHECK DTC OF TCM
Check DTC in “Self Diagnostic Result ” mode of “TCM” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to TM-78, "DTC Index".
NO >> GO TO 2.
2.CHECK BCM INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
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.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2604 PNP/CLUTCH SW The following states are detected for 5 seconds
while ignition switch is ON.
 P/N position signal is sent from TCM but shift
position signal input (CAN) from TCM is other
than P and N
 P/N position signal is not sent from TCM but
shift position signal input (CAN) from TCM is P
or N  Harness or connectors
(CAN communication line is open
or shorted.)
 Harness or connectors
(TCM circuit is open or shorted.)
TCM
BCM
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M71 102 Ground Selector lever P or N position 12
Other than above 0
Revision: 2010 May2011 QX56

SEC-90
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2604 SHIFT POSITION
For initialization and registration procedures, refer
to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
4.CHECK BCM INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T assembly connector.
3. Disconnect BCM connector.
4. Check continuity between A/T assembly harness connector and BCM harness connector.
5. Check continuity between A/T assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
A/T assembly BCM Continuity
Connector Terminal Connector Terminal
F51 9 M71 102 Existed
A/T assembly GroundContinuity
Connector Terminal
F51 9 Not existed
Revision: 2010 May2011 QX56

B2605 SHIFT POSITIONSEC-91
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2605 SHIFT POSITION
DTC LogicINFOID:0000000006226241
DTC DETECTION LOGIC
NOTE:
 If DTC B2605 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2605 is displayed with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Shift the selector lever to the P position.
2. Turn ignition switch ON and wait 1 second or more.
3. Shift the selector lever to the N position and wait 1 second or more.
4. Shift the selector lever to any position other than P and N, and wait 1 second or more.
5. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-91, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226242
1.CHECK IPDM E/R INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> GO TO 2.
2.CHECK IPDM E/R INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between IPDM E/R harness connector and BCM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2605 PNP/CLUTCH SW When ignition switch is ON, P/N position
signal input from TCM and P/N position
signal (CAN) input from IPDM E/R do not
match.  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors (TCM circuit is open or shorted.)
 IPDM E/R
BCM
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E15 48 Ground Selector lever P or N position 12
Other than above 0
IPDM E/R BCM Continuity
Connector Terminal Connector Terminal
E15 48 M71 102 Existed
Revision: 2010 May2011 QX56

SEC-92
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2605 SHIFT POSITION
4. 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 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
IPDM E/R GroundContinuity
Connector Terminal
E15 48 Not existed
Revision: 2010 May2011 QX56

B2608 STARTER RELAYSEC-93
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2608 STARTER RELAY
DTC LogicINFOID:0000000006226243
DTC DETECTION LOGIC
NOTE:
 If DTC B2608 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B2608 is displayed with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the following conditions to start engine.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Wait 1 second after engine started.
3. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-93, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226244
1.CHECK DTC OF IPDM E/R
Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Perform the trouble diagnosis rela ted to the detected DTC. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK BCM POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK STARTER RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Disconnect BCM connector.
4. Check continuity between IPDM E/R harness connector and BCM harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2608 STARTER RELAY BCM outputs starter motor relay OFF signal
but BCM receives star
ter motor relay ON
signal from IPDM E/R (CAN).  Harness or connectors
(CAN communication line is open or
shorted.)
 Harness or connectors (Starter relay circuit is open or shorted.)
 IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal
M71 97 Ground Selector lever N or P position 12
Other than above 0
Revision: 2010 May2011 QX56