2011 INFINITI QX56 ignition

PCS
B26F2 IGNITION RELAYPCS-69
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
C
D
E
F
G H
I
J
K L
B A
O P
N
NO >> Repair or replace harness.
4.CHECK IGNITION RELAY (IPDM E/
R) CONTROL SIGNAL CIRCUIT - 2
1. Connect IPDM E/R connectors.
2. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Replace IPDM E/R.
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal E17 68 Ground Ignition switch OFF or ACC 12
Revision: 2010 May2011 QX56

PCS-70
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F6 BCM
B26F6 BCM
DTC LogicINFOID:0000000006220220
DTC DETECTION LOGIC
NOTE:
 If DTC B26F6 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26F6 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 PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for 1 second or more.
- Selector lever is in the P or N position
- Do not depress brake pedal
2. Check “Self-diagnosis result” of BCM with CONSULT-III.
Is DTC detected?
YES >> Go to PCS-70, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006220221
1.INSPECTION START
1. Turn ignition switch ON.
2. Select “Self-diagnosis result” of BCM with CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure. See PCS-70, "
DTC Logic".
Is DTC detected?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation"
NO >> INSPECTION END
DTC No.Trouble diagnosis
name DTC detecting condition Possible cause
B26F6 BCM Ignition relay ON signal is not transmitted from IPDM E/
R when BCM turns ignition relay ON. BCM
Revision: 2010 May2011 QX56

PCS
PUSH-BUTTON IGNITION SWITCHPCS-71
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
C
D
E
F
G H
I
J
K L
B A
O P
N
PUSH-BUTTON IGNITION SWITCH
Component Function CheckINFOID:0000000006220222
1.CHECK FUNCTION
1. Select “PUSH SW” in “Data Monitor” of BCM with CONSULT-III.
2. Check the push-button ignition switch signal under the following conditions.
Is the indication normal?
YES >> INSPECTION END.
NO >> Go to PCS-71, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006220223
1.CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Disconnect push-button ignition swit ch connector and IPDM E/R connector.
3. Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 1
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and push-button ignition switch harness connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2
Check voltage between IPDM E/R harness connector and ground.
Test item Condition Status
PUSH SW Push-button ignition switch is pressed ON
Push-button ignition switch is not pressed OFF
(+)
(–)Voltage (V)
(Approx.)
Push-button ignition switch
Connector Terminal M101 4 Ground 12
BCM Push-button ignition switch Continuity
Connector Terminal Connector Terminal
M71 100 M101 4 Existed
BCM GroundContinuity
Connector Terminal
M71 100 Not existed
Revision: 2010 May2011 QX56

PCS-72
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
PUSH-BUTTON IGNITION SWITCH
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 2
1. Disconnect BCM connector.
2. Check continuity between IPDM E/R harness connec tor and push-button ignition switch harness connec-
tor.
3. Check continuity between IP DM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness.
5.CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
6.CHECK PUSH-BUTTON IGNITION SWITCH
Refer to PCS-72, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace push-button ignition switch.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006220224
1.CHECK PUSH-BUTTON IGNITION SWITCH
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch connector.
3. Check continuity between push- button ignition switch terminals.
(+)
(–)Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal E17 66 Ground Battery voltage
IPDM E/R Push-button ignition switch Continuity
Connector Terminal Connector Terminal
E17 66 M101 4 Existed
IPDM E/R GroundContinuity
Connector Terminal
E17 66 Not existed
Push-button ignition switch GroundContinuity
Connector Terminal
M101 1 Existed
Revision: 2010 May2011 QX56

PCS
PUSH-BUTTON IGNITION SWITCHPCS-73
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
C
D
E
F
G H
I
J
K L
B A
O P
N
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace push-button ignition switch.
Push-button ignition switch
Condition Continuity
Te r m i n a l
41 Pressed Existed
Not pressed Not existed
Revision: 2010 May2011 QX56

PCS-74
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
PUSH-BUTTON IGNITION SW
ITCH POSITION INDICATOR
PUSH-BUTTON IGNITION SWITCH POSITION INDICATOR
DescriptionINFOID:0000000006220225
Push-button ignition switch changes the power supply position.
BCM maintains the power supply position status.
BCM changes the power supply position with the operation of the push-button ignition switch.
Component Function CheckINFOID:0000000006220226
1.CHECK FUNCTION
Check push-button ignition switch (“LOCK INDICATO R”, “ACC INDICATOR” and “IGNITION ON IND”) in
Active Test of BCM with CONSULT-III.
Is the inspection result normal?
YES >> INSPECTION END.
NO >> Refer to PCS-74, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006220227
1.CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch connector.
3. Check voltage between push-button ignition switch harness connector and ground.
Is the inspection normal?
YES >> GO TO 2.
NO-1 >> Check 10 A fuse [No.10, located in fuse block (J/B)].
NO-2 >> Check harness for open or short betw een push-button ignition switch and fuse.
2.CHECK BCM INPUT
1. Connect push-button ignition switch connector.
2. Disconnect BCM connector.
3. Check voltage between BCM connector and ground.
Is the inspection normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 3.
3.CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1. Disconnect push-button ignition switch connector.
Te s t i t e m D e s c r i p t i o n
LOCK INDICATOR
ACC INDICATOR
IGNITION ON IND ON
Position indicator Illuminates
OFF Does not illuminate
(+) (–)Voltage (V)
(Approx.)
Push-button ignition switch
Connector Terminal M101 8 Ground Battery voltage
(+) (–)Voltage (V)
(Approx.)
BCM
Connector Terminal
M101 73
Ground Battery voltage
91
109
Revision: 2010 May2011 QX56

PCS
PUSH-BUTTON IGNITION SWITCH POSITION INDICATORPCS-75
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
C
D
E
F
G H
I
J
K L
B A
O P
N
2. Check continuity between BCM harness connector
and push-button ignition switch harness connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection normal?
YES >> Replace push-button ignition switch.
NO >> Repair or replace harness.
Indicator BCM Push-button ignition switch
Continuity
Connector Terminal Connector Terminal
LOCK M71 91
M101 5
Existed
ACC 109 6
ON 73 7
Indicator BCM
GroundContinuity
Connector Terminal
LOCK M71 91
Not existed
ACC 109
ON 73
Revision: 2010 May2011 QX56

PCS-76
< SYMPTOM DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
PUSH-BUTTON IGNITION SW
ITCH DOES NOT OPERATE
SYMPTOM DIAGNOSIS
PUSH-BUTTON IGNITION SWITCH DOES NOT OPERATE
DescriptionINFOID:0000000006220228
Check that vehicle is under the condition shown in “C onditions of vehicle” before starting diagnosis, and check
each symptom.
NOTE:
The engine start function, door lock function, power dist ribution system, and NATS-IVIS/NVIS in the Intelligent
Key system are closely related to each other regarding c ontrol. The vehicle security function can operate only
when the door lock and power distribution system are operating normally.
Conditions of Vehicle (Operating Conditions)
 “ENGINE START BY I-KEY” in “WORK SUPPOR T” is ON when setting on CONSULT-III.
 One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.
Diagnosis ProcedureINFOID:0000000006220229
1.PERFORM WORK SUPPORT
Perform “INSIDE ANT DIAGNOSIS” on Wo rk Support of “INTELLIGENT KEY”.
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
>> GO TO 2.
2.PERFORM SELF-DIAGNOSIS RESULT
Perform Self-Diagnosis Result of “BCM”.
Is DTC detected?
YES >> Refer to BCS-57, "DTCIndex".
NO >> GO TO 3.
3.CHECK PUSH-BUTTON IGNITION SWITCH
Check push-button ignition switch.
Refer to PCS-71, "
ComponentFunctionCheck".
Is the operation normal?
YES >> GO TO 4.
NO >> Repair or replace malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> GO TO 1.
Revision: 2010 May2011 QX56