2011 INFINITI QX56 heating

COMPONENT PARTSDEF-5
< SYSTEM DESCRIPTION >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006299423
Component DescriptionINFOID:0000000006299424
1. BCM Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion"
2. Door mirror defogger (driver side) 3. Rear window defogger connector
4. Rear window defogger connector 5. Multifunction switch (rear window defogger switch)
Refer to AV- 9 , "
Component Parts Lo-
cation"
6. IPDM E/R
Refer to PCS-4, "
Component Parts
Location"
7. AV control unit 8. Wiper deicer
JMLIA0978ZZ
BCM  Transmits rear window defogger switch operation to IPDM E/R via CAN commu-
nication
 Performs the timer control of rear window defogger
IPDM E/R Controls rear window defogger relay when rear window defogger switch signal is re-
ceived via CAN communication, and then operates rear window defogger
Multifunction switch  The rear window defogger switch is installed
 Turns the indicator lamp ON when detecting the operation of rear window defog-
ger
Rear window defogger switch  The rear window defogger is operated by turning the rear window defogger switch
ON.
 The indicator lamp in the rear window defogger switch illuminates when the rear window defogger is operating.
Rear window defogger relay Operates the rear window defogger with the control signal from IPDM E/R
Rear window defogger Heats the heating wire with the power supply from the rear window defogger relay
to prevent the rear window from fogging up.
Door mirror defogger Heats the heating wire with the power supply from the rear window defogger relay
to prevent the door mirror from fogging up.
Wiper deicer Heats the heating wire with the power supply from the wiper deicer relay to thaw the
frozen wiper blade and glass.
Wiper deicer relay Supplies power to the wiper deicer with rear window defogger relay control.
Revision: 2010 May2011 QX56

DEF-26
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
DescriptionINFOID:0000000006299436
The rear window defogger is operated by turning the rear window defogger switch ON.
Component Function CheckINFOID:0000000006299437
1.CHECK FUNCTION
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger relay function is OK.
NO >> Refer to DEF-26, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299438
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check the 15A fuse (No. 41, 42 located in IPDM E/R).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK IPDM E/R OUTPUT SIGNAL
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
(+)
(− ) CONSULT-III Active Test condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E11 14 Ground REAR DEFOGGER ON Battery voltage
OFF 0
Revision: 2010 May2011 QX56

REAR WINDOW DEFOGGERDEF-27
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
REAR WINDOW DEFOGGER
DescriptionINFOID:0000000006299439
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function CheckINFOID:0000000006299440
1.CHECK FUNCTION
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger relay function is OK.
NO >> Refer to DEF-26, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299441
1.CHECK REAR WINDOW DEFOGG ER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK REAR WINDOW DE FOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK FILAMENT
Refer to DEF-43, "
Inspection and Repair".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair filament.
4.CHECK REAR WINDOW DEFOGG ER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector and rear window defogger harness connector.
(+)
(− ) Condition Voltage (V)
(Approx.)
Rear window defogger
Connector Terminal
D103 1 Ground Rear window defogger switch ON Battery voltage
OFF 0
Rear window defogger GroundContinuity
Connector Terminal
D104 2 Existed
Revision: 2010 May2011 QX56

DOOR MIRROR DEFOGGERDEF-29
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000006299442
Heats the heating wire with the power supply from t he rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000006299443
1.CHECK DOOR MIRROR DEFOGGER
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that both side door mirror glasses are getting warmer.
Is the inspection result normal?
YES >> Door mirror defogger is OK.
NO >> Refer to DEF-29, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299444
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse [No.80, loca ted in fuse block (J/B)].
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK DOOR MIRROR DEFOGGER CIRCUIT
1. Disconnect IPDM E/R connector and door mirror (both sides) connector.
2. Check continuity between IPDM E/R harness connec tor and door mirror (driver side) harness connector.
3. Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
IPDM E/R Door mirro r (driver side)
Continuity
Connector Terminal Connector Terminal
E11 14 D3 7 Existed
IPDM E/R GroundContinuity
Connector Terminal
E11 14 Not existed
Revision: 2010 May2011 QX56

DEF-30
< DTC/CIRCUIT DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER
DRIVER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000006299445
Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000006299446
1.CHECK DRIVER SIDE DOOR MIRROR DEFOGGER
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the driver side door mirror glass is getting warmer.
Is the inspection result normal?
YES >> Driver side door mirror defogger is OK.
NO >> Refer to DEF-30, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299447
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between door mirror (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (driver side) harness connector and ground.
Is the inspection result normal?
YES >> Replace door mirror glass (driver side).
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror (driver side)
Connector Terminal
D3 7 Ground Rear window defogger
switchON Battery voltage
OFF 0
Door mirror (driver side)
GroundContinuity
Connector Terminal
D3 19 Existed
Revision: 2010 May2011 QX56

PASSENGER SIDE DOOR MIRROR DEFOGGERDEF-31
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
PASSENGER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000006299448
Heats the heating wire with the power supply from t he rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000006299449
1.CHECK PASSENGER SIDE DOOR MIRROR DEFOGGER
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the passenger side door mirror glass is getting warmer.
Is the inspection result normal?
YES >> Passenger side door mirror defogger is OK.
NO >> Refer to DEF-31, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299450
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror (passenger side) connector.
3. Turn ignition switch ON.
4. Check voltage between door mirror (passenger side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (passenger side) harness connector and ground.
Is the inspection result normal?
YES >> Replace door mirror glass (passenger side).
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror (passenger side)
Connector Terminal
D23 7 Ground Rear window defogger
switchON Battery voltage
OFF 0
Door mirror (passenger side)
GroundContinuity
Connector Terminal
D23 19 Existed
Revision: 2010 May2011 QX56

DEF-32
< DTC/CIRCUIT DIAGNOSIS >
WIPER DEICER RELAY
WIPER DEICER RELAY
Component Function CheckINFOID:0000000006299451
1.CHECK WIPER DEICER RELAY POWER SUPPLY CIRCUIT
1. Select Active Test (“REAR DEFOGGER”) mode of “BCM” using CONSULT-III.
2. Touch “ON”.
3. Check that the front window heating wire is getting warmer.
Is the inspection result normal?
YES >> Wiper deicer relay power supply circuit function is OK.
NO >> Refer to DEF-32, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006299452
1.CHECK WIPER DEICER CIRCUIT 1
1. Turn ignition switch ON.
2. Check voltage between wiper deicer relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK WIPER DEICER CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay and IPDM E/R connector.
3. Check continuity between wiper deicer relay terminal connector and IPDM E/R harness connector.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
3.CHECK WIPER DEICER CIRCUIT 3
Check voltage between wiper deicer relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK WIPER DEICER RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay connector.
3. Check continuity between wiper deicer relay terminal connector and ground.
(+)
(–) Condition Voltage (V)
(Approx.)
Wiper deicer relay
Connector Terminal
E23 1 Ground Rear window defogger switch: ON Battery voltage
Rear window defogger switch: OFF 0
Wiper deicer relay IPDM E/R
Continuity
Connector Terminal Connector Terminal
E23 1 E11 14 Existed
(+) (–)Voltage (V)
(Approx.)
Wiper deicer relay
Connector Terminal E23 3 Ground Battery voltage
Revision: 2010 May2011 QX56

DEF-34
< DTC/CIRCUIT DIAGNOSIS >
WIPER DEICER
WIPER DEICER
Component Function CheckINFOID:0000000006299454
1.CHECK WIPER DEICER
1. Select Active Test (“REAR DEFOGGER”) mode of “BCM” using CONSULT-III.
2. Touch “ON”.
3. Check that the front window heating wire is getting warmer.
Is the inspection result normal?
YES >> Wiper deicer is OK.
NO >> Refer to DEF-34, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299455
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 15 A fuse [No.75, located in fuse block (J/B)]
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between wiper deicer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect wiper deicer connector.
3. Check continuity between wiper deicer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness between rear window defogger and ground.
4.CHECK WIPER DEICER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay connector and wiper deicer connector.
3. Check continuity between wiper deicer relay harness connector and wiper deicer harness connector.
(+)
(–) Condition Voltage (V)
(Approx.)
Wiper deicer
Connector Terminal
E40 1 Ground Rear window defogger switch: ON Battery voltage
Rear window defogger switch: OFF 0
Wiper deicer
GroundContinuity
Connector Terminal
E40 2 Existed
Revision: 2010 May2011 QX56