Mitsubishi L200. Manual - part 858

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-48

STEP 9. Check the wiring harness between C-217 
rear window defogger relay connector No.1 and 
ignition switch (IG2).

AC509934 BA

Connectors: C-207, C-217 <LHD>

Harness side

C-207

C-217

C-207

C-217

Junction block side

Junction block (Front view)

AC509936AX

Connectors: C-207, C-217 <RHD>

Harness side

C-207

C-217

C-207

C-217

Junction block side

Junction block (Front view)

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-207, 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.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-49

STEP 10. Check the wiring harness between C-
217 rear window defogger relay connector No.2 
and C-05 A/C switch module connector No.8.

AC509611AV

Connector: C-05 <LHD>

Harness side

AC509932 BA

Harness side

Connector: C-05 <RHD>

AC509934 BB

Connectors: C-208, C-217 <LHD>

Harness side

C-208

C-217

C-217

C-208

Junction block side

Junction block (Front view)

AC509936AY

Connectors: C-208, C-217 <RHD>

Harness side

C-208

C-217

C-217

C-208

Junction block side

Junction block (Front view)

NOTE: 

AC509613BW

Connector: C-15 <LHD>

AC509932DR

Connector: C-15 <RHD>

Prior to the wiring harness inspection, check junction 
block connector C-208 and intermediate connector 
C-15, and repair if necessary.

• Check the rear window defogger power supply 

line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the wiring harness.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55A-50

STEP 11. Check the wiring harness between C-
217 rear window defogger relay connector No.3 
and D-07 rear window defogger connector No.1.

AC509934BC

Connectors: C-212, C-217 <LHD>

Harness side

C-212

C-217

C-212

C-217

Junction block side

Junction block (Front view)

AC509936AZ

Connectors: C-212, C-217 <RHD>

Harness side

C-212

C-217

C-212

C-217

Junction block side

Junction block (Front view)

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-51

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-212, and repair if neces-
sary.

• Check the rear window defogger relay 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 12. Connector check: D-10 rear window 
defogger connector

AC509961AF

Harness side

D-10 (B)

Connector: D-10 <Single cab>

AC509965AI

Harness side

Connector: D-10 <Club cab>

D-10 (B)

AC509967AQ

Harness side

D-10 (B)

Connector: D-10 <Double cab>

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the connector.

STEP 13. Resistance measurement at D-10 rear 
window defogger connector.

AC509961AF

Harness side

D-10 (B)

Connector: D-10 <Single cab>

AC509965AI

Harness side

Connector: D-10 <Club cab>

D-10 (B)

AC509967AQ

Harness side

D-10 (B)

Connector: D-10 <Double cab>

(1) Disconnect the connector, and measure at the 

wiring harness side.

AC403234

Connector D-10 
(Harness side)

CC

(2) Continuity between terminal 1 and body earth.

OK: Continuity (Less than 2

Ω)

Q: Is the check result normal?

YES : 

 Go to Step 15.

NO : 

 Go to Step 14.