2011 INFINITI QX56 ground

PCS-66
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F1 IGNITION RELAY
B26F1 IGNITION RELAY
DTC LogicINFOID:0000000006220216
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for 2 seconds 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-66, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006220217
1.CHECK IPDM E/R SELF-DIAGNOSTIC RESULT
1. Turn ignition switch ON.
2. Erase the DTC of IPDM E/R.
3. Turn ignition switch OFF.
4. Turn ignition switch ON and check the DTC again.
Is DTC detected?
YES >> Repair or replace the malfunctioning part. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
3.CHECK IGNITION RELAY (IPDM E/ R) CONTROL SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM and IPDM connectors.
3. Check continuity between BCM harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES >> Replace IPDM E/R.
DTC No. Trouble diagnosis
name DTC detecting condition Possible cause
B26F1 IGN RELAY OFF BCM transmits the ignition relay control signal
(ON: 0 V) or ignition switch ON signal (ON)
(CAN), but does not receives ignition switch
ON signal (ON) (CAN) from IPDM E/R.  Harness or connectors
(Ignition relay ci rcuit is open)
BCM
 IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
BCM
Connector Terminal M71 98 Ground Ignition switch ON 0
BCM IPDM E/R Continuity
Connector Terminal Connector Terminal
M71 98 E17 68 Existed
Revision: 2010 May2011 QX56

PCS-68
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F2 IGNITION RELAY
B26F2 IGNITION RELAY
DTC LogicINFOID:0000000006220218
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for 2 seconds 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-68, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006220219
1.CHECK IPDM E/R SELF-DIAGNOSTIC RESULT
1. Turn ignition switch ON.
2. Erase the DTC of IPDM E/R.
3. Turn ignition switch OFF.
4. Turn ignition switch ON and check the DTC again.
Is DTC detected?
YES >> Repair or replace the malfunctioning part. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> GO TO 3.
3.CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT - 1
1. Disconnect BCM and IPDM E/R connectors.
2. Check continuity between IP DM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
DTC No. Trouble diagnosis
name DTC detecting condition Possible cause
B26F2 IGN RELAY ON BCM transmits the ignition relay control signal
(OFF: 12 V) or ignition switch ON signal (OFF)
(CAN), but does not receives ignition switch
ON signal (OFF) (CAN) from IPDM E/R.  Harness or connectors
(Ignition relay ci rcuit is short)
BCM
 IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal E17 68 Ground Ignition switch OFF or ACC 12
IPDM E/R GroundContinuity
Connector Terminal
E17 68 Not existed
Revision: 2010 May2011 QX56

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
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-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

PG
PG-1
ELECTRICAL & POWER CONTROL
C
DE
F
G H
I
J
K L
B
SECTION PG
A
O P
N
CONTENTS
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
PRECAUTION ................
...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tools .......................................... ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Circuit Breaker .................................................... ......5
Battery .......................................................................5
Harness Connector ...................................................5
Standardized Relay ...................................................8
WIRING DIAGRAM ......................................11
POWER SUPPLY ROUTING CIRCUIT .......... ....11
Wiring Diagram - BATTERY POWER SUPPLY - ....11
Wiring Diagram - BATTERY POWER SUPPLY
FUSIBLE LINK No. K - ........................................ ....
29
Wiring Diagram - BATTERY POWER SUPPLY
FUSIBLE LINK No. S - ............................................
33
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 6 - ...........................................................
37
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 7 - ...........................................................
43
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 9 - ...........................................................
46
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 10 - .........................................................
51
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 35 - .........................................................
54
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 43 - .........................................................
60
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 46 - .........................................................
64
Wiring Diagram - BATTERY POWER SUPPLY
FUSE No. 47 - ..................................................... ....
67
Wiring Diagram - ACCESSORY POWER SUP-
PLY - ........................................................................
80
Wiring Diagram - ACCESSORY POWER SUP-
PLY FUSE No. 19 - .................................................
83
Wiring Diagram - ACCESSORY POWER SUP-
PLY FUSE No. 20 - .................................................
86
Wiring Diagram - IGNITION POWER SUPPLY - . ....89
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 3 - ....................................................... ..
105
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 4 - ....................................................... ..
109
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 37 - ..................................................... ..
115
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 55 - ..................................................... ..
121
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 57 - ..................................................... ..
123
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 61 - ..................................................... ..
126
Wiring Diagram - IGNITION POWER SUPPLY
FUSE No. 80 - ..................................................... ..
129
OPTION HARNESS ........................................133
Wiring Diagram .................................................... ..133
FUSE BLOCK - JUNCTION BOX (J/B) ..........140
Fuse, Connector and Terminal Arrangement ........140
FUSE, FUSIBLE LINK AND RELAY BOX ......141
Fuse and Fusible Link Arrangement ......................141
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ..............
143
Fuse, Connector and Terminal Arrangement ........143
HARNESS LAYOUT .......................................144
How To Read Harness Layout ............................ ..144
Outline ...................................................................145
Engine Room Harness ..........................................146
Engine Control Harness ........................................148
Revision: 2010 May2011 QX56