Page 561 of 5883
DEF-10
< FUNCTION DIAGNOSIS >
CAN COMMUNICATION
CAN COMMUNICATION
System DescriptionINFOID:0000000001697547
Refer to XX-XX, "*****".
Page 562 of 5883

REAR WINDOW DEFOGGER SWITCH
DEF-11
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
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J
K
MA
B
DEF
N
O
P
COMPONENT DIAGNOSIS
REAR WINDOW DEFOGGER SWITCH
DescriptionINFOID:0000000001697548
The rear window defogger is operated by turning the rear window defogger switch ON.
Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.
Component Function CheckINFOID:0000000001697549
1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.
Is the inspection result normal?
YES >> Rear window defogger switch function is OK.
NO >> Refer to DEF-11, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001697550
1. CHECK CONTROLLER (AUTO AMP.) (REAR WINDOW DEFOGGER SWITCH)
Does controller (auto amp.) operate normally?
Is the inspection result normal?
YES >> Inspection End.
NO >> GO TO 2
2. CHECK REAR WINDOW DEFOGGER SWITCH INDICATOR CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between controller (auto amp.) connector and
ground.
Is the inspection result normal?
YES >> Repair or replace harness.
NO >> Replace controller (auto amp.). Refer to XX-XX, "*****"
.
Te r m i n a l s
Condition of rear
window defogger
switchVoltage (V)
(Approx.) (+)
(–) Controller (auto
amp.) connec-
torTe r m i n a l
M37 22 GroundON Battery voltage
OFF 0
ALLIA0174ZZ
Page 563 of 5883

DEF-12
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
DescriptionINFOID:0000000001697551
Power is supplied to the rear window defogger with BCM control.
Component Function CheckINFOID:0000000001697552
1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when
turning the rear window defogger switch ON.
Is the inspection result normal?
YES >> Rear window defogger relay power supply circuit is OK.
NO >> Refer to DEF-12, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001697553
1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
Is the inspection result normal?
YES >> Rear window defogger power supply circuit is OK.
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and fuse block (J/B).
3. Check continuity between BCM connector (A) and fuse block (J/
B) connector (B).
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Refer to DEF-13, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace rear window defogger relay.
4. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to XX-XX, "*****"
Is the inspection result normal?
YES >> Check the following.
Te r m i n a l s
Condition of rear
window defogger
switchVoltage (V)
(Approx.) (+)
(–)
BCM connector Terminal
M18 59 GroundON 0
OFF Battery voltage
ALLIA0175ZZ
BCM connector TerminalFuse block (J/B)
connectorTerminal Continuity
M18 (A) 59 M4 (B) 4Q Yes
ALLIA0176ZZ
Page 564 of 5883
REAR WINDOW DEFOGGER RELAY
DEF-13
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
MA
B
DEF
N
O
P
Battery power supply circuit.
Fuse block (J/B).
NO >> Repair or replace the malfunctioning parts.
Component InspectionINFOID:0000000001697554
1. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Is the inspection result normal?
YES >> Inspection End.
NO >> Replace rear window defogger relay.
Te r m i n a l
Condition Continuity
Rear window
defogger relay
3512V direct current supply between termi-
nals 1 and 2.Ye s
No current supply No
SEF497Y
Page 565 of 5883

DEF-14
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DescriptionINFOID:0000000001697555
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:0000000001697556
1. CHECK REAR WINDOW DEFOGGER
Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES >> Rear window defogger is OK.
NO >> Refer to DEF-14, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001697557
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger connector and
ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Check continuity between rear window defogger connector and
ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> Repair or replace harness.
3. CHECK HARNESS CONTINUITY 1
Te r m i n a l s
Condition of rear
window
defogger switchVoltage (V)
(Approx.) (+)
(–) Rear window
defogger
connectorTe r m i n a l
B53 1 GroundON Battery voltage
OFF 0
ALLIA0177ZZ
Rear window defogger connector Terminal
GroundContinuity
B54 2 Yes
ALLIA0178ZZ
Page 566 of 5883

REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DEF-15
< COMPONENT DIAGNOSIS >
C
D
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F
G
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K
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B
DEF
N
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P
1. Turn ignition switch OFF.
2. Disconnect condenser and rear window defogger.
3. Check continuity between condenser connector (A) and rear
window defogger connector (B).
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace condenser. Refer to DEF-38, "
Removal and
Installation".
4. CHECK HARNESS CONTINUITY 2
1. Disconnect fuse block (J/B).
2. Check continuity between fuse block (J/B) connector (A) and
condenser connector (B).
Is the inspection result normal?
YES >> GO TO 6
NO >> Replace or repair harness.
5. CHECK FILAMENT
Check filament.
Refer to DEF-15, "
Component Inspection".
Is the inspection result normal?
YES >> Refer to XX-XX, "*****".
NO >> Repair filament. Refer to DEF-36, "
Inspection and Repair".
6. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> Check the following.
Battery power supply circuit.
Fuse block (J/B).
NO >> Repair or replace the malfunctioning parts.
Component InspectionINFOID:0000000001697558
1. CHECK FILAMENT
Check the filament for damage or open circuits.
Refer to DEF-36, "
Inspection and Repair".
Is the inspection result normal?
YES >> Inspection End.
NO >> Repair filament. Refer to DEF-36, "
Inspection and Repair".
Condenser
connectorTe r m i n a lRear window defogger
connectorTerminal Continuity
B52 (A) 1 B53 (B) 1 Yes
ALLIA0179ZZ
Fuse block (J/B)
connectorTe r m i n a lCondenser
connectorTerminal Continuity
B4 (A)10T
B52 (B) 1 Yes
11T
ALLIA0180ZZ
Page 567 of 5883

DEF-16
< COMPONENT DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER
DRIVER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000001697559
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:0000000001697560
1. CHECK DOOR MIRROR DEFOGGER LH
Check that heating wire of door mirror defogger LH is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES >> Door mirror defogger is OK.
NO >> Refer to DEF-16, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001697561
1. CHECK 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.
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 LH connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DOOR MIRROR DEFOGGER LH
Check door mirror defogger LH.
Refer to DEF-17, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 4
NO >> Replace door mirror. Refer to XX-XX, "*****"
.
4. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Te r m i n a l s
Condition of
rear window
defogger
switchVoltage (V)
(Approx.) (+)
(–)
Door mirror LH
connectorTe r m i n a l
D4 1 GroundON Battery voltage
OFF 0
ALLIA0181ZZ
Door mirror LH connector Terminal
GroundContinuity
D4 2 Yes
ALLIA0184ZZ
Page 568 of 5883
DRIVER SIDE DOOR MIRROR DEFOGGER
DEF-17
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
MA
B
DEF
N
O
P
Refer to XX-XX, "*****".
Is the inspection result normal?
YES >> Check the following.
Battery power supply circuit.
Fuse block (J/B).
NO >> Repair or replace the malfunctioning parts.
Component InspectionINFOID:0000000001697562
1. CHECK DOOR MIRROR DEFOGGER LH
1. Turn ignition switch OFF.
2. Disconnect door mirror LH.
3. Check continuity between door mirror terminals.
Is the inspection result normal?
YES >> Inspection End.
NO >> Replace door mirror LH. Refer to XX-XX, "*****"
.
Terminal Continuity
12 Yes
ALLIA0185ZZ