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DEF-2
Component Function Check ...................................32
Diagnosis Procedure ..............................................32
Component Inspection ............................................33
SYMPTOM DIAGNOSIS .............................34
DEFOGGER SYSTEM SYMPTOMS .............. ...34
Symptom Table ................................................... ...34
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. .. ...
35
Diagnosis Procedure ........................................... ...35
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ................................ ...
36
Diagnosis Procedure ........................................... ...36
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ............................................ ...
37
Diagnosis Procedure ........................................... ...37
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .................................. ...
38
Diagnosis Procedure ............................................ ...38
PASSENGER SIDE DOOR MIRROR DEFOG-
GER DOES NOT OPERATE. ......................... ...
39
Diagnosis Procedure ............................................ ...39
REAR WINDOW DEFOGGER SWITCH DOES
NOT LIGHT, BUT REAR WINDOW DEFOG-
GER OPERATES ............................................ ...
40
Diagnosis Procedure ............................................ ...40
REMOVAL AND INSTALLATION ..............41
FILAMENT ...................................................... ...41
Inspection and Repair .......................................... ...41
CONDENSER ....................................................43
Removal and Installation .........................................43
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COMPONENT PARTSDEF-5
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000009463022
ALLIA1145ZZ
1. BCM (view with co mbination meter re-
moved) 2. A/C auto amp. (with auto A/C) (view
with A/C switch assembly removed) 3. A/C switch assembly (rear window
defogger switch) (with auto A/C)
4. Front air control (rear window defogger switch) (without auto A/C) 5. Rear window defogger relay 6. A. Rear window defogger power
connector
B. Condenser (view with rear pillar
finisher LH removed)
7. Rear window defogger ground connec- tor (view with rear pillar finisher RH re-
moved) 8. Door mirror LH (door mirror defog-
ger) (if equipped) (RH similar)
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DEF-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Component Description
INFOID:0000000009463023
1: With auto A/C
2: With manual A/C
3: With heated mirrors Component Description
BCM • Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.
Rear window defogger relay • Operates the rear window defogger and the door mirror defogger with the control signal from
BCM.
A/C auto amp
1• Displays the rear window defogger ON to the display when detecting the operation of the rear window defogger.
A/C switch assembly
1 (rear
window defogger switch) • The rear window defogger switch is turned ON.
Front air control
2 (rear window
defogger switch) • The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.
Rear window defogger • Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up.
Door mirror defogger
3• Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror from fogging up.
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SYSTEMDEF-7
< SYSTEM DESCRIPTION >
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System DiagramINFOID:0000000009463024
System DescriptionINFOID:0000000009463025
Operation Description
• When rear window defogger switch is turned ON while ignition switch is ON, the rear window defogger switch transmits rear window defogger switch signal to BCM.
• BCM turns rear window defogger relay ON when rear window defogger switch signal is received.
• Rear window defogger and door mirror defogger (with door mirror defogger) are supplied with power and
operate when rear window defogger relay turns ON.
• Rear window defogger ON is displayed when front air c ontrol (manual A/C) or A/C switch assembly (auto A/
C) receives signals.
Timer function
• BCM turns rear window defogger relay ON for approx imately 15 minutes when rear window defogger switch
is turned ON while ignition switch is ON. It makes rear window defogger and door mirror defogger (with door
mirror defogger) operate.
• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF.
INPUT/OUTPUT SIGNAL CHART
*: With door mirror defogger
ALLIA1146GB
Switch Input signal to BCM BCM function Actuator
Rear window defogger switch Defogger switch signal Rear window defogger and door
mirror defogger
* control Rear window defogger
Door mirror defogger *Push button ignition switch Ignition signal
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DEF-30
< DTC/CIRCUIT DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER
DRIVER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000009463045
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:0000000009463046
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-30, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009463047
Regarding Wiring Diagram information, refer to DEF-11, "Wiring Diagram".
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-31, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace door mirror. Refer to MIR-20, "Removal and Installation"
.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror LH
Connector Terminal
D4 1 Ground Rear window de-
fogger switch ON Battery voltage
OFF 0
Door mirror LH GroundContinuity
Connector Terminal
D4 5 Yes
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DRIVER SIDE DOOR MIRROR DEFOGGER
DEF-31
< DTC/CIRCUIT DIAGNOSIS >
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4. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-43, "Intermittent Incident"
.
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:0000000009463048
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 MIR-20, "Removal and Installation"
.
Terminal Continuity
15 Yes
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DEF-32
< DTC/CIRCUIT DIAGNOSIS >
PASSENGER SIDE DOOR MIRROR DEFOGGER
PASSENGER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000009463049
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:0000000009463050
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-32, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009463051
Regarding Wiring Diagram information, refer to DEF-11, "Wiring Diagram".
1. CHECK 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.
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 RH connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3. CHECK PASSENGER SIDE DOOR MIRROR DEFOGGER
Check door mirror defogger RH.
Refer to DEF-33, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace door mirror RH. Refer to MIR-20, "Removal and Installation"
.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror RH
Connector Terminal
D107 1 Ground Rear window de-
fogger switch ON Battery voltage
OFF 0
Door mirror RH GroundContinuity
Connector Terminal
D107 5 Yes
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PASSENGER SIDE DOOR MIRROR DEFOGGERDEF-33
< DTC/CIRCUIT DIAGNOSIS >
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4. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-43, "Intermittent Incident"
.
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:0000000009463052
1. CHECK DOOR MIRROR DEFOGGER RH
1. Turn ignition switch OFF.
2. Disconnect door mirror RH.
3. Check continuity between door mirror terminals.
Is the inspection result normal?
YES >> Inspection End.
NO >> Replace door mirror RH. Refer to MIR-20, "Removal and Installation"
.
Terminal Continuity
15 Yes
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