Mitsubishi Lancer Evolution IX. Manual - part 549

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-69

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-214, and repair if neces-
sary.

• Check the rear window defogger relay line for 

open or short circuit.

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the wiring harness.

STEP 12. Connector check: C-215 rear window 
defogger relay connector and F-16 rear window 
defogger connector

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the connector.

AC504635AI

Harness side

Junction block (Front view)

C-214

C-215

C-215

C-214

Connectors: C-214, C-215 <RHD>

Junction block 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>

AC504707AB

Harness side

Connector: F-16 <LHD>

AC504709AB

Harness side

Connector: F-16 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-70

STEP 13. Check the wiring harness between 
C-215 rear window defogger relay connector 
terminal No.4 and F-16 rear window defogger 
connector terminal No.1.

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-217, and repair if neces-
sary.

• Check the rear window defogger power supply 

line for open or short circuit.

Q: Is the check result normal?

YES : 

Replace the automatic A/C control panel 

(A/C-ECU).

NO : 

Repair the wiring harness.

AC504633AK

Connectors: C-215, C-217 <LHD>

Junction block side

Junction block (Front view)

C-215

C-217

C-215

C-217

AC504635AK

Junction block side

Junction block (Front view)

C-217

C-215

C-215

Connectors: C-215, C-217 <RHD>

C-217

AC504707AB

Harness side

Connector: F-16 <LHD>

AC504709AB

Harness side

Connector: F-16 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-71

STEP 14. Resistance measurement at F-06 rear 
window defogger connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Continuity between terminal 1 and body earth.

OK: 2 ohm or less

Q: Is the check result normal?

YES : 

 Go to Step 17.

NO : 

 Go to Step 15.

STEP 15. Connector check: F-06 rear window 
defogger connector

Q: Is the check result normal?

YES : 

Go to Step 16.

NO : 

Repair the connector.

AC504707AC

Harness side

F-06 (B)

Connector: F-06 <LHD>

AC504709AC

Harness side

F-06 (B)

Connector: F-06 <RHD>

AC301541KH

Connector F-06 
(Harness side)

AC504707AC

Harness side

F-06 (B)

Connector: F-06 <LHD>

AC504709AC

Harness side

F-06 (B)

Connector: F-06 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-72

STEP 16. Check the wiring harness between F-06 
rear window defogger connector terminal No.1 
and earth.

• Check the rear window defogger earth 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 or replace the wiring harness.

STEP 17. Check the rear window defogger.
Refer to 

P.54A-80

.

Q: Does the rear window defogger work normally? 

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00, How to 
Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Repair the rear window defogger.

AC504707AC

Harness side

F-06 (B)

Connector: F-06 <LHD>

AC504709AC

Harness side

F-06 (B)

Connector: F-06 <RHD>