Page 2225 of 3371

GW-90
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
Rear Window Defogger Switch Circuit CheckEIS002VX
1. CHECK REAR WINDOW DEFOGGER SWITCH OPERATION
With CONSULT-II
Check (“REAR DEF SW”, “IGN ON SW”) in DATA MONITOR mode
with CONSULT-II.
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
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
M18 9 (Y/B) GroundRear window defogger
switch is pressed.0
Rear window defogger
switch is OFF.5
LIIA0402E
9 (Y/B) - 11 (Y/B) : Continuity should exist.
9 (Y/B) - Ground : Continuity should not exist.
LIIA2035E
Page 2226 of 3371

REAR WINDOW DEFOGGER
GW-91
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: August 20072004 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.
NG >> Replace BCM.
Rear Window Defogger Power Supply Circuit CheckEIS002VY
1. CHECK FUSE
Check if any of the following fuses in IPDM E/R are blown.
NOTE:
Refer to GW-78, "
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-
78, "Component Parts and Harness Connector Location" .
2. CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
Check voltage between IPDM E/R connector E124 terminal 60 and ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair or replace harness.9 (Y/B) - Ground : Approx. 5
LIIA0402E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R15A 46
15A 47
60 (B) - Ground : Battery voltage
WIIA0525E
Page 2227 of 3371

GW-92
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
Rear Window Defogger Circuit CheckEIS002VZ
1. 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 2.
NG >> Repair or replace harness.
2. 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-96, "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.
Door Mirror Defogger Power Supply Circuit CheckEIS002W1
1. CHECK FUSE
Check if the following fuse in the IPDM E/R is blown.
NOTE:
Refer to GW-78, "
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-78, "
Component Parts and Harness Connector Location" .
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
D406 + (B) GroundRear window defogger
switch ON. Battery voltage
Rear window defogger
switch OFF.0
LIIA2048E
- (B) - Ground : Continuity should exist.
LIIA0409E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R 15A 43
Page 2228 of 3371

REAR WINDOW DEFOGGER
GW-93
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: August 20072004 QX56
2. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace 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.
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
E12023
(GR/W)GroundRear window defogger
switch ON Battery voltage
Rear window defogger
switch OFF0
LIIA2049E
23 (GR/W) - 10 (GR/W) : Continuity should exist.
WIIA0527E
11 (B) - Ground : Continuity should exist.
LIIA1454E
Page 2229 of 3371

GW-94
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
5. CHECK DOOR MIRROR DEFOGGER
Check continuity between each door mirror 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.
Door Mirror LH Defogger Circuit CheckEIS002W3
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.10 - 11 : Continuity should exist.
LIIA2305E
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
D410
(GR/W)GroundRear window defogger
switch ON Battery voltage
Rear window defogger
switch OFF0
LIIA1456E
11 (B) - Ground : Continuity should exist.
LIIA1458E
Page 2230 of 3371

REAR WINDOW DEFOGGER
GW-95
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: August 20072004 QX56
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.
Door Mirror RH Defogger Circuit CheckEIS002W5
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 terminal 11 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.10 - 11 : Continuity should exist.
LIIA2305E
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
D107 10 (GR/W) GroundRear window defogger
switch ON Battery voltage
Rear window defogger
switch OFF0
LIIA1456E
11 (B) - Ground : Continuity should exist.
LIIA1458E
Page 2231 of 3371

GW-96
REAR WINDOW DEFOGGER
Revision: August 20072004 QX56
3. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror RH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror RH.
Rear Window Defogger Signal CheckEIS002W6
1. CHECK AV COMMUNICATION LINE
AV communication line check is executed. Refer to AT C - 3 2 , "
CAN Communication System Description" .
OK or NG
OK >> GO TO 2.
NG >> Replace display control unit.
2. CHECK CAN COMMUNICATION LINE
CAN communication line check is executed. Refer to LAN-5, "
CAN COMMUNICATION" .
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> In addition, it is necessary to check CAN communication line. Refer to LAN-5, "
CAN COMMUNI-
CATION" .
Filament CheckEIS002W7
1. When measuring voltage, wrap tin foil around the top of the neg-
ative probe.Then press the foil against the wire with your finger.
2. Attach probe circuit tester (in Volt range) to middle portion of
each filament.10 - 11 : Continuity should exist.
LIIA2305E
Is rear window defogger displayed on the display?
SEL122R
SEL263
Page 2232 of 3371

REAR WINDOW DEFOGGER
GW-97
C
D
E
F
G
H
J
K
L
MA
B
GW
Revision: August 20072004 QX56
3. If a filament is burned out, circuit tester registers 0 or battery
voltage.
4. To locate burned out point, move probe to left and right along fil-
ament. Test needle will swing abruptly when probe passes the
point.
Filament RepairEIS002W8
REPAIR EQUIPMENT
Conductive silver composition (DuPont No. 4817 or equivalent)
Ruler 30 cm (11.8 in) long
Drawing pen
Heat gun
Alcohol
Cloth
REPAIRING PROCEDURE
1. Wipe broken heat wire and its surrounding area clean with a
cloth dampened in alcohol.
2. Apply a small amount of conductive silver composition to tip of
drawing pen.
Shake silver composition container before use.
3. Place ruler on glass along broken line. Deposit conductive silver
composition on break with drawing pen. Slightly overlap existing
heat wire on both sides [preferably 5 mm (0.20 in)] of the break.
4. After repair has been completed, check repaired wire for conti-
nuity. This check should be conducted 10 minutes after silver
composition is deposited.
Do not touch repaired area while test is being conducted.
SEL265
PIIA0215E
SEL012D