Mitsubishi L200. Manual - part 184

 

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Mitsubishi L200. Manual - part 184

 

 

TROUBLESHOOTING

DIESEL FUEL

13A-532

Inspection Procedure 28: Rear Window Defogger System <Euro5>

OPERATION

• The battery voltage is applied to the engine-ECU 

(terminal No. 10) from the rear window defogger 
relay.

FUNCTION

• When the rear window defogger is turned ON and 

the battery voltage is applied to the engine-ECU, 
the engine-ECU increases the idle speed.

PROBABLE CAUSES

• Failed rear window defogger system

• Open/short circuit or harness damage in rear win-

dow defogger relay circuit or loose connector 
contact

• Failed engine-ECU

AKB00332

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C-105

Rear window 
defogger relay

10

10

*2

*1

11

J/C (8)
C-08

J/B

L-O

L-O

10

19

7.5A

C-208

L-O

B-G

Rear Window Defogger 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: Grey
R: Red  P: Pink  V: Violet  PU: Purple  SI: Silver

Engine-ECU

AB

19

C-53*¹ or
C-35*²

NOTE

*1: L.H. drive vehicles
*2: R.H. drive vehicles

TROUBLESHOOTING

DIESEL FUEL

13A-533

DIAGNOSIS PROCEDURE

STEP 1. Check the rear window defogger.
The rear defogger system should work normally 
(Refer to GROUP 54A, Printed Heater Lines Check ).

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Check rear window defogger relay system 
(Refer to GROUP 55A 

− Troubleshooting − 

Check Chart for Trouble Symptoms  
<Manual A/C>, GROUP 55B 

− 

Troubleshooting 

− Check Chart for Trouble 

Symptoms  <Automatic A/C>).

STEP 2. Connector check: C-105 engine-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Perform voltage measurement at C-105 
engine-ECU connector.

• Measure engine-ECU terminal voltage.

• Engine: Idling

• Voltage between terminal No. 10 and earth.

OK:

System voltage (when rear window defogger 

is ON)

1 V or less (when rear window defogger is 

OFF)

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 4 .

AKA00089

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

AKA00089

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

TROUBLESHOOTING

DIESEL FUEL

13A-534

STEP 4. Connector check: C-208 junction block 
connector.

Q: Is the check result normal?

YES : 

Go to Step 5. 

NO : 

Repair or replace the connector.

STEP 5. Check harness between C-208 (terminal 
No. 10) junction block connector and C-105 
(terminal No. 10) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector C-53 <L. H. drive vehicles>, C-08 <R. H. 
drive vehicles> and C-35 <R. H. drive vehicles>, and 
repair if necessary.

• Check output line for open/short circuit.

Q: Is the check result normal?

AKB00333

Connector: C-208
<L. H. drive vehicles>

<R. H. drive vehicles>

Junction block (Front view)

C-208

C-208

Harness side
connector

Junction block 
(Front view)

AB

AKB00333

Connector: C-208
<L. H. drive vehicles>

<R. H. drive vehicles>

Junction block (Front view)

C-208

C-208

Harness side
connector

Junction block 
(Front view)

AB

AKA00089

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

TROUBLESHOOTING

DIESEL FUEL

13A-535

YES : 

Replace the engine-ECU.

NO : 

Repair the damaged harness wire.

STEP 6. Connector check: C-208 junction block 
connector.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair or replace the connector.

STEP 7. Check harness between C-208 (terminal 
No. 10) junction block connector and C-105 
(terminal No. 10) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector C-53 <L. H. drive vehicles>, C-08 <R. H. 
drive vehicles> and C-35 <R. H. drive vehicles>, and 
repair if necessary.

• Check output line for damage.

Q: Is the check result normal?

AKB00333

Connector: C-208
<L. H. drive vehicles>

<R. H. drive vehicles>

Junction block (Front view)

C-208

C-208

Harness side
connector

Junction block 
(Front view)

AB

AKB00333

Connector: C-208
<L. H. drive vehicles>

<R. H. drive vehicles>

Junction block (Front view)

C-208

C-208

Harness side
connector

Junction block 
(Front view)

AB

AKA00089

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C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB

 

 

 

 

 

 

 

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