Mitsubishi Lancer Evolution IX. Manual - part 548

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-65

STEP 5. Connector check: C-215 rear window 
defogger relay connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the connector.

STEP 6. Check the wiring harness between C-215 
rear window defogger relay connector terminal 
No.5 and the fusible link (1).

AC504692AC

Connector: C-215 <LHD>

Junction block side

Junction block (Front view)

AC504694AC

Junction block (Front view)

Junction block side

Connector: C-215 <RHD>

AC504633AG

Connectors: C-212, C-215 <LHD>

Harness side

Junction block (Front view)

C-215

C-215

C-212

C-212 (B)

Junction block side

AC504635AG

Harness side

Junction block (Front view)

C-215

C-212

C-215

C-212 (B)

Connectors: C-212, C-215 <RHD>

Junction block side

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-66

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connectors C-126 and junction block connector 
C-212, and repair if necessary.

• 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 

P.00-5

).

NO : 

Repair the wiring harness.

STEP 7. Voltage measurement at C-215 rear 
window defogger relay connector. 

(1) Remove the relay, and measure at the junction 

block side.

(2) Turn the ignition switch to the "ON" position.

(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 8.

AC504622AH

Connector: C-126 <LHD>

Harness side

AC504618AN

Connector: C-126 <RHD>

Harness side

AC504692AC

Connector: C-215 <LHD>

Junction block side

Junction block (Front view)

AC504694AC

Junction block (Front view)

Junction block side

Connector: C-215 <RHD>

AC301541KG

Connector C-215
(Junction block side)

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-67

STEP 8. Connector check: C-215 rear window 
defogger relay connector

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the connector.

STEP 9. Check the wiring harness between C-215 
rear window defogger relay connector No.1 and 
ignition switch (IG2).

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-211, 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 

P.00-5

).

NO : 

Repair the wiring harness.

AC504692AC

Connector: C-215 <LHD>

Junction block side

Junction block (Front view)

AC504694AC

Junction block (Front view)

Junction block side

Connector: C-215 <RHD>

AC504633AH

Connectors: C-211, C-215 <LHD>

Harness side

C-211

Junction block (Front view)

C-211

C-215

C-215

Junction block side

AC504635AH

Harness side

C-211

Junction block (Front view)

C-211

C-215

C-215

Junction block side

Connectors: C-211, C-215 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-68

STEP 10. Connector check: C-215 rear window 
defogger relay connector and C-36 A/C-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the connector.

STEP 11. Check the wiring harness between rear 
window defogger relay connector C-215 No.3 and 
A/C-ECU connector C-36 No.16.

AC504622AB

Connector: C-36 <LHD>

Harness side

C-36 (B)

AC504618AJ

Connector: C-36 <RHD>

Harness side

C-36 (B)

AC504692AC

Connector: C-215 <LHD>

Junction block side

Junction block (Front view)

AC504694AC

Junction block (Front view)

Junction block side

Connector: C-215 <RHD>

AC504622AB

Connector: C-36 <LHD>

Harness side

C-36 (B)

AC504618AJ

Connector: C-36 <RHD>

Harness side

C-36 (B)

AC504633AI

Connectors: C-214, C-215 <LHD>

Harness side

Junction block (Front view)

C-214

C-215

C-215

C-214

Junction block side