Page 772 of 4083

DOOR MIRROR DEFOGGER LHDEF-13
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
NO >> Repair or replace harness.
4. CHECK DOOR MIRROR DEFOGGER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and door mirror LH.
3. Check continuity between IPDM E/R connector E120 terminal 23 and door mirror LH connector D4 terminal 10.
Is the inspection result normal?
YES >> GO TO 5
NO >> Repair or replace harness.
5. CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
Check continuity between door mirror LH connector D4 terminal 11
and ground.
Is the inspection result normal?
YES >> GO TO 6
NO >> Repair or replace harness.
6. CHECK DOOR MIRROR DEFOGGER LH
Check door mirror defogger LH.
Refer to DEF-13, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7
NO >> Replace door mirror. Refer to MIR-11, "
Door Mirror Assembly".
7. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Check the following. • Battery power supply circuit.
• IPDM E/R.
NO >> Repair or replace the malfunctioning parts.
Component InspectionINFOID:0000000001735626
1. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror LH terminals 10 and 11.
Is the inspection result normal?
YES >> Check the condition of the harness and the connector.
NO >> Replace malfunctioning door mirror LH. Refer to MIR-
11 , "Door Mirror Assembly".
23 - 10
: Continuity should exist.
WIIA0529E
11 - Ground: Continuity should exist.
LIIA1454E
10 - 11 : Continuity should exist.
WIIA0531E
Revision: March 2010 2008 QX56
Page 773 of 4083

DEF-14
< COMPONENT DIAGNOSIS >
DOOR MIRROR DEFOGGER RH
DOOR MIRROR DEFOGGER RH
DescriptionINFOID:0000000001735631
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:0000000001735632
1.CHECK DOOR MIRROR DEFOGGER RH
Check that the heating wire of door mirror defogger RH is heated when turning the rear window defogger
switch ON.
Is the inspection result normal?
YES >> Door mirror defogger RH is OK.
NO >> Refer to DEF-14, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735633
1. CHECK POWER SUPPLY
Check if the following fuse in the IPDM E/R is blown.
Is the inspection result normal?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK DOOR MIRROR DE FOGGER POWER SUPPLY CIRCUIT
Check voltage between IPDM E/R connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace IPDM E/R. Refer to PCS-34, "
Removal and Installation of IPDM E/R".
3. CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
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.
Is the inspection result normal?
YES >> GO TO 4
COMPONENT PARTS AMPEREFUSE NO.
IPDM E/R 15A43
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
E120 23 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA2049E
ConnectorTe r m i n a l
ConditionVoltage (V)
(Approx.)
(+) (-)
D107 10 Ground Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF 0
LIIA1456E
Revision: March 2010
2008 QX56
Page 774 of 4083

DOOR MIRROR DEFOGGER RHDEF-15
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
NO >> Repair or replace harness.
4. CHECK DOOR MIRROR DEFOGGER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and door mirror RH.
3. Check continuity between IPDM E/R connector E120 terminal 23 and door mirror RH connector D107 terminal 10.
Is the inspection result normal?
YES >> GO TO 5
NO >> Repair or replace harness.
5. CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
Check continuity between door mirror RH connector D107 terminal
11 and ground.
Is the inspection result normal?
YES >> GO TO 6
NO >> Repair or replace harness.
6. CHECK DOOR MIRROR DEFOGGER RH
Check door mirror defogger RH.
Refer to DEF-15, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7
NO >> Replace door mirror. Refer to MIR-11, "
Door Mirror Assembly".
7. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Check the following. • Battery power supply circuit.
• IPDM E/R.
NO >> Repair or replace the malfunctioning parts.
Component InspectionINFOID:0000000001735634
1. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror RH terminals 10 and 11.
Is the inspection result normal?
YES >> Check the condition of the harness and the connector.
NO >> Replace malfunctioning door mirror RH. Refer to MIR-
11 , "Door Mirror Assembly".
23 - 10
: Continuity should exist.
WIIA0529E
11 - Ground: Continuity should exist.
LIIA1454E
10 - 11 : Continuity should exist.
WIIA0531E
Revision: March 2010 2008 QX56
Page 784 of 4083
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER DO NOT OPER-
ATE.
DEF-25
< SYMPTOM DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
DEF
N
O P
SYMPTOM DIAGNOSIS
REAR WINDOW DEFOGGER AND DO OR MIRROR DEFOGGER DO NOT
OPERATE.
Diagnosis ProcedureINFOID:0000000001735637
1. CHECK REAR WINDOW DEFOGGER SWITCH
Check rear window defogger switch.
Refer to DEF-10, "
Component Function Check".
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace the malfunctioning parts.
2. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Refer to DEF-9, "
Component Function Check".
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Revision: March 2010 2008 QX56
Page 785 of 4083
DEF-26
< SYMPTOM DIAGNOSIS >
REAR WINDOW DEFOGGER DOES NOT OPERATE BUT BOTH OF DOOR MIR-ROR DEFOGGER OPERATE.
REAR WINDOW DEFOGGER DOES NO T OPERATE BUT BOTH OF DOOR
MIRROR DEFOGGER OPERATE.
Diagnosis ProcedureINFOID:0000000001735638
1. CHECK REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
Check rear window defogger power supply and ground circuit.
Refer to DEF-10, "
Component Function Check".
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Revision: March 2010 2008 QX56
Page 786 of 4083
BOTH DOORS MIRROR DEFOGGER DON’T OPERATE BUT REAR WINDOW DEFOGGER OPERATES
DEF-27
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
DEF
N
O P
BOTH DOORS MIRROR DEFOGGER DON’T OPERATE BUT REAR WIN-
DOW DEFOGGER OPERATES
Diagnosis ProcedureINFOID:0000000001735639
1. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-38, "
Intermittent Incident".
Is the inspection result normal?
YES >> Check the following. • Battery power supply circuit.
• IPDM E/R.
NO >> Repair or replace the malfunctioning parts.
Revision: March 2010 2008 QX56
Page 787 of 4083
DEF-28
< SYMPTOM DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER DOES NOT OPERATE.
DRIVER SIDE DOOR MIRROR DEFOGGER DOES NOT OPERATE.
Diagnosis ProcedureINFOID:0000000001735640
1. CHECK DOOR MIRROR DEFOGGER LH
Check door mirror defogger LH.
Refer to DEF-12, "
Component Function Check".
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Revision: March 2010 2008 QX56
Page 788 of 4083
PASSENGER SIDE DOOR MIRROR DEFOGGER DOES NOT OPERATE.
DEF-29
< SYMPTOM DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
DEF
N
O P
PASSENGER SIDE DOOR MIRROR DEFOGGER DOES NOT OPERATE.
Diagnosis ProcedureINFOID:0000000001735641
1. CHECK DOOR MIRROR DEFOGGER RH
Check door mirror defogger RH.
Refer to DEF-14, "
Component Function Check".
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Revision: March 2010 2008 QX56