2006 INFINITI QX56 window

REAR WINDOW DEFOGGERGW-83
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Revision: November 2009 2006 QX56
Door mirror defogger RH does not operate.1. Door mirror LH (door mirror defogger) circuit checkGW-90
Rear window defogger switch does not light, and rear win-
dow defogger is not shown on the display, but the rear win-
dow defogger operates. 1. Rear window defogger signal check
GW-90
SymptomDiagnoses / Service procedureRefer to page

GW-84
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
BCM Power Supply and Ground Circuit CheckEIS005YW
1. CHECK FUSES AND FUSIBLE LINK

Check 10A fuse (No. 8, located in the fuse block (J/B)]

Check 10A fuse (No. 59, located in the fuse and relay box)

Check 50A fusible link (letter f , located in the fuse and fusible link box)
NOTE:
Refer to GW-74, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector M18, M20 terminals 38, 70
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check continuity between BCM connector M20 terminal 67 and ground.
OK or NG
OK >> BCM power supply and ground circuit is OK.
NG >> Repair or replace harness. 70 - Ground
: Battery voltage
38 - Ground : Battery voltage
LIIA0914E
67 - Ground : Continuity should exist.
LIIA0915E

REAR WINDOW DEFOGGERGW-85
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Revision: November 2009 2006 QX56
Rear Window Defogger Switch Circuit CheckEIS005YX
1. CHECK REAR WINDOW DEFOGGER SWITCH OPERATION
With CONSULT-II
Check ( “REAR DEF SW ”, “IGN ON SW ”) in DATA MONITOR mode
with CONSULT-II. Refer to GW-82, "
DATA MONITOR" .
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
OK or NG
OK >> Rear window defogger switch check is OK.
NG >> GO TO 2.
2. CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and front air control.
3. Check continuity between BCM connector M18 terminal 9 and front air control connector M49 terminal 11.
4. Check continuity between BCM connector M18 terminal 9 and ground
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. When rear window defogger switch is turned to ON
REAR DEF SW
: ON
When ignition switch is turned to ON
IGN ON SW : ON
PIIA2373E
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
M18 9 Ground Rear window defogger
switch is pressed.
0
Rear window defogger
switch is OFF. 5
WIIA0523E
9 - 11
: Continuity should exist.
9 - Ground : Continuity should not exist.
LIIA2035E

GW-86
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
3. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M18 terminal 9 and ground.
OK or NG
OK >> Replace front air control. Refer to ATC-144, "FRONT
AIR CONTROL" .
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
Rear Window Defogger Circuit CheckEIS0062Z
1. CHECK FUSES
Check if any of the following fuses in IPDM E/R are blown.
NOTE:
Refer to GW-74, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to GW-
74, "Component Parts and Harness Connector Location" .
2. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector D406 terminal + and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4. 9 - Ground
: Approx. 5
WIIA0523E
COMPONENT PARTS AMPEREFUSE NO.
IPDM E/R 15A46
IPDM E/R 15A47
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
D406 + Ground Rear window defogger
switch ON.
Battery voltage
Rear window defogger
switch OFF. 0
LIIA0655E

REAR WINDOW DEFOGGERGW-87
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Revision: November 2009 2006 QX56
3. CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector D604 terminal - and ground.
OK or NG
OK >> Check filament. Refer to GW-91, "Filament Check" .

If filament is OK.
Check the condition of the harness and the connector.

If filament is NG.
Repair filament.
NG >> Repair or replace harness.
4. CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector E124 terminal 60 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-30, "Removal and Installation of IPDM E/R" .
NG >> Repair or replace harness.
Door Mirror Defogger Power Supply Circuit CheckEIS005Z0
1. CHECK FUSE
Check if any of the following fuses in fuse block (J/B) are blown.
NOTE:
Refer to GW-74, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to
GW-74, "
Component Parts and Harness Connector Location" .
- - Ground
: Continuity should exist.
LIIA0409E
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
E124 60 Ground Rear window defogger
switch ON.
Battery voltage
Rear window defogger
switch OFF. 0
WIIA0525E
COMPONENT PARTS
AMPEREFUSE NO.
IPDM E/R 15A43

GW-88
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
2. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
Check voltage between IPDM E/R connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace IPDM E/R. Refer to PG-30, "
Removal and
Installation of IPDM E/R" .
3. CHECK DOOR MIRROR DEFOGGER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and door mirror LH or RH.
3. Check continuity between IPDM E/R connector E120 terminal 23 and door mirror connector D4 (LH) or D107 (RH) terminal 10.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
Check continuity between each door mirror connector D4 (LH) or
D107 (RH) terminal 11 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5. CHECK DOOR MIRROR DEFOGGER
Check continuity between each door mirror LH or RH terminals 10
and 11.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace malfunctioning door mirror LH or RH. Refer to GW-94, "
Door Mirror Assembly" .
Connector Terminals
ConditionVoltage (V)
(Approx.)
(+) (-)
E120 23 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA0977E
23 - 10
: Continuity should exist.
WIIA0529E
11 - Ground: Continuity should exist.
LIIA1454E
10 - 11 : Continuity should exist.
LIIA2725E

REAR WINDOW DEFOGGERGW-89
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Revision: November 2009 2006 QX56
Door Mirror LH (Door Mirror Defogger) Circuit CheckEIS005Z1
1. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror LH.
3. Turn ignition switch ON.
4. Check voltage between door mirror LH connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror LH connector D4 terminal 11 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror LH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror LH. Refer to GW-94, "
Door Mirror
Assembly" .
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
D4 10 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA1456E
11 - Ground
: Continuity should exist.
LIIA1458E
10 - 11 : Continuity should exist.
LIIA2725E

GW-90
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
Door Mirror RH (Door Mirror Defogger) Circuit CheckEIS005Z2
1. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror RH.
3. Turn ignition switch ON.
4. Check voltage between door mirror RH connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror RH connector D107 termi- nal 11 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DOOR MIRROR DEFOGGER
Check continuity between each door mirror RH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror RH. Refer to GW-94, "
Door Mirror
Assembly" .
Rear Window Defogger Signal CheckEIS005Z3
1. CHECK AV COMMUNICATION LINE
AV communication line check is executed. Refer to AV- 4 4 , "
Audio Communication Line Check" .
OK or NG
OK >> GO TO 2.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY CONTROL UNIT" .
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
D107 10 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA1456E
11 - Ground
: Continuity should exist.
LIIA1458E
10 - 11 : Continuity should exist.
LIIA2725E
Is rear window defogger displayed on the display?