Page 2225 of 3383

GW-80
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
Terminal and Reference Value for BCMEIS005YR
Terminal and Reference Value for IPDM E/REIS005YS
Work FlowEIS005YT
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-75, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to GW-82,
"Trouble Diagnoses Symptom Chart" .
4. Does rear window defogger and door mirror defogger operate normally? YES: GO TO 5, NO: GO TO 3.
5. Inspection end.
Terminal Wire color ItemConditionVoltage (V)
(Approx.)
9Y /B Rear window defogger
switch signal When rear window defogger switch is pressed.
0
When rear window defogger switch is OFF. 5
38 W/L Ignition switch ON or START Ignition switch (ON or START position) Battery voltage
39 L CAN-H ——
40 P CAN-L ——
67 B Ground —0
70 W/B Battery power supply —Battery voltage
Terminal Wire color ItemConditionVoltage (V)
(Approx.)
38 B Ground (Power) —0
39 L CAN-H ——
40 P CAN-L ——
59 B Ground (Signal) —0
60 BRear window defogger output
signal When rear window defogger switch is ON. Battery voltage
When rear window defogger switch is OFF.
0
Page 2226 of 3383

REAR WINDOW DEFOGGERGW-81
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Revision: November 2009 2006 QX56
CONSULT-II Function (BCM)EIS005YU
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL) ”.
5. Touch “BCM”.
If “BCM ” is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test item Diagnostic mode
Content
Inspection by part WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read. ECU PART NUMBER BCM part number can be read.CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E
Page 2227 of 3383

GW-82
REAR WINDOW DEFOGGER
Revision: November 20092006 QX56
6. Touch “REAR DEFOGGER ”.
7. Select diagnosis mode, “DATA MONITOR” and “ACTIVE TEST ”.
DATA MONITOR
Display Item List
ACTIVE TEST
Display Item List
Trouble Diagnoses Symptom ChartEIS005YV
Make sure other systems using the signal of the following systems operate normally.
LIIA0153E
BCIA0031E
Monitor item “Operation ” Content
REAR DEF SW “ON/OFF ”Displays
“Press (ON)/others (OFF) ” status determined with the rear window defogger
switch.
IGN ON SW “ON/OFF ”Displays “IGN (ON)/OFF ” status determined with the ignition switch signal.
Test item Content
REAR WINDOW DEFOGGER Gives a drive signal to the rear window defogger to activate it.
Symptom Diagnoses / Service procedureRefer to page
Rear window defogger and door mirror defoggers do not
operate. 1. BCM power supply and ground circuit check
GW-84
2. IPDM E/R auto active test check PG-24
3. Rear window defogger switch circuit checkGW-85
4. Rear window defogger circuit checkGW-86
5. Replace IPDM E/ R PG-30
Rear window defogger does not operate but both of door
mirror defoggers operate. 1. Rear window defogger circuit check
GW-862. Filament checkGW-86
3. Replace IPDM E/R PG-30
Both door mirror defoggers do not operate but rear win-
dow defogger operates. 1. Door mirror defogger power supply circuit check
GW-87
2. Replace IPDM E/R PG-30
Door mirror defogger LH does not operate. 1. Door mirror LH (door mirror defogger) circuit checkGW-89
Page 2228 of 3383
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
Page 2229 of 3383
![INFINITI QX56 2006 Factory Service Manual 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)]
INFINITI QX56 2006 Factory Service Manual 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)]
](/manual-img/42/57028/w960_57028-2228.png)
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
Page 2230 of 3383

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
Page 2231 of 3383

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
Page 2232 of 3383

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