Mitsubishi Colt Ralliart. Manual — part 531
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-32
Inspection Procedure 8: The rear window defogger does not work
REAR
WINDOW
DEFOGGER
RELAY
REAR WINDOW
DEFOGGER
METER AND A/C-ECU
COMBINATION METER
DEFOGGER DRIVE
CIRCUIT
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
FUSIBLE
LINK
6
IGNITION
SWITCH (IG2)
Defogger Circuit
CIRCUIT OPERATION
If the rear window defogger does not operate when
the rear window defogger switch is turned on, the
rear window defogger relay system may be defec-
tive.
TROUBLESHOOTING HINTS
• Malfunction of the combination meter (meter and
A/C-ECU)
• Malfunction of the rear window defogger relay
• Damaged the wiring harness or connectors
• Malfunction of the rear window defogger
DIAGNOSIS PROCEDURE
Step 1. Check the A/C operation.
Q: Do the A/C work normally?
YES :
Go to Step 2.
NO :
Refer to Inspection procedure 3 "Cool air
does not come
."
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-33
Step 2. Connector check: B-15 combination
meter connector and E-13 rear window defogger
connector
AC401055
AE
Connector: B-15
B-15 (B)
Harness side
AC401046
Connector: E-13
AF
Harness side
E-13 (B)
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
Step 3. Voltage measurement at E-13 rear window
defogger connector.
AC401046
Connector: E-13
AF
Harness side
E-13 (B)
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
AC401055
AE
Connector: B-15
B-15 (B)
Harness side
AC309471
AC309471
Connector B-15
(Harness side)
AN
(3) Disconnect combination meter connector B-15
and earth terminal 13.
AC400965
Connector E-13
(Harness side)
AK
(4) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 4.
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-34
Step 4. Connector check: B-125 rear window
defogger relay connector
AC313824AK
Junction block side
Junction block (Front view)
Connector: B-125
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the connector.
Step 5. Check the rear window defogger relay
continuity.
Refer to
.
Q: Is the rear window defogger relay in good
condition?
YES :
Go to Step 6.
NO :
Replace the rear window defogger relay.
Step 6. Voltage measurement at B-125 rear
window defogger relay connector.
AC313824AK
Junction block side
Junction block (Front view)
Connector: B-125
(1) Remove the relay, and measure at the junction
block side.
AC310507 FM
Connector B-125
(Junction block side)
(2) Measure the voltage between terminal 3 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 7.
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-35
Step 7. Check the wiring harness between B-125
rear window defogger relay connector terminal
No.3 and the fusible link (6).
AC313824AK
Junction block side
Junction block (Front view)
Connector: B-125
NOTE: Prior to the wiring harness inspection, check
junction block connector B-108, and repair if neces-
sary.
• Check the rear window defogger relay power
supply line for open or short circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
).
NO :
Repair the wiring harness.
Step 8. Voltage measurement at B-125 rear
window defogger relay connector.
AC313824AK
Junction block side
Junction block (Front view)
Connector: B-125
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the "ON" earth position.
AC310507 FM
Connector B-125
(Junction block side)
(3) Voltage between terminal 1 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
Step 9. Check the wiring harness between B-125
rear window defogger relay connector No.1 and
ignition switch (IG2).
AC313824AK
Junction block side
Junction block (Front view)
Connector: B-125
AC313826
Harness side
AE
Connector: B-130
Junction block (Rear view)
NOTE: Prior to the wiring harness inspection, check
junction block connector B-130, and repair if neces-
sary.
• Check the rear window defogger power supply
line for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
Main
Index
Group
TOC
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст