Mitsubishi L200. Manual - part 857

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-44

STEP 2. Connector check: C-05 A/C switch 
module connector and D-07 rear window 
defogger connector

AC509611AV

Connector: C-05 <LHD>

Harness side

AC509932 BA

Harness side

Connector: C-05 <RHD>

AC509961AE

Harness side

Connector: D-07 <Single cab>

D-07 (B)

AC509965AD

Harness side

Connector: D-07 <Club cab>

D-07 (B)

AC509967AO

Harness side

Connector: D-07 <Double cab>

D-07 (B)

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-45

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector.

STEP 3. Voltage measurement at D-07 rear 
window defogger connector. 

AC509961AE

Harness side

Connector: D-07 <Single cab>

D-07 (B)

AC509965AD

Harness side

Connector: D-07 <Club cab>

D-07 (B)

AC509967AO

Harness side

Connector: D-07 <Double cab>

D-07 (B)

(1) Disconnect the connector, and measure at the 

wiring harness side.

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

AC509611AV

Connector: C-05 <LHD>

Harness side

AC509932 BA

Harness side

Connector: C-05 <RHD>

AC402768

AC402768

Connector C-05 
(Harness side)

AE

(3) Disconnect A/C switch module connector C-05 

and earth terminal 8.

AC402679

Connector D-07 
(Harness side)

CB

(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.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-46

STEP 4. Connector check: C-217 rear window 
defogger relay connector 

AC509934AY

Connector: C-217 <LHD>

Junction block side

Junction block (Front view)

AC509936AV

Connector: C-217 <RHD>

Junction block side

Junction block (Front view)

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 C-217 rear 
window defogger relay connector. 

AC509934AY

Connector: C-217 <LHD>

Junction block side

Junction block (Front view)

AC509936AV

Connector: C-217 <RHD>

Junction block side

Junction block (Front view)

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

block side.

AC402679

Connector C-217 
(Harness side)

CC

(2) Measure the voltage between terminal 4 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 8.

NO : 

 Go to Step 7.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-47

STEP 7. Check the wiring harness between C-217 
rear window defogger relay connector terminal 
No.4 and the fusible link (20).

AC509934AZ

Connectors: C-213, C-217 <LHD>

Harness side

C-213

C-217

Junction block side

C-217

Junction block (Front view)

C-213

AC509936AW

Connectors: C-213, C-217 <RHD>

Harness side

C-213

C-217

Junction block side

C-217

Junction block (Front view)

C-213

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-213, and repair if neces-
sary.

• Check the rear window defogger relay power 

supply line for open and 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 C-217 rear 
window defogger relay connector. 

AC509934AY

Connector: C-217 <LHD>

Junction block side

Junction block (Front view)

AC509936AV

Connector: C-217 <RHD>

Junction block side

Junction block (Front view)

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

block side.

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

AC402679

Connector C-217 
(Harness side)

CD

(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.