Mitsubishi Montero (2002-2004). Manual - part 328

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-359

STEP 3. Check headlight (LH) connector A-20 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is headlight (LH) connector A-20 in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

STEP 4. Check the wiring harness between headlight (LH) 
connector A-20 (terminal 2) and ground.
Q: Is the wiring harness between headlight (LH) connector 

A-20 (terminal 2) and ground in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the headlights illuminate normally.

STEP 5. Check headlight (RH) bulb.
(1) Remove the headlight (RH) bulb.
(2) Verify that the headlight (RH) bulb is not damaged or 

burned out.

Q: Is headlight (RH) bulb normal?

YES : Go to Step 6.
NO :  Replace the headlight (RH) bulb. Verify that the 

headlights illuminate normally.

STEP 6. Check headlight (RH) connector A-32 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is headlight (RH) connector A-32 in good condition?

YES : Go to Step 7.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

AC204167

CONNECTOR : A-20

HARNESS 
SIDE

A-20(B)

A-20(B)

AI

2

1

Y

3

AC204167

CONNECTOR : A-20

HARNESS 
SIDE

A-20(B)

A-20(B)

AI

2

1

Y

3

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-360

STEP 7. Check the wiring harness between headlight (RH) 
connector A-32 (terminal 2) and ground.
Q: Is the wiring harness between headlight (RH) connector 

A-32 (terminal 2) and ground in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the headlights illuminate normally.

STEP 8. Check headlight (LH) bulb.
(1) Remove the headlight (LH) bulb.
(2) Verify that the headlight (LH) bulb is not damaged or burned 

out.

Q: Is headlight (LH) bulb normal?

YES : Go to Step 9.
NO :  Replace the headlight (LH) bulb. Verify that the 

headlights illuminate normally.

STEP 9. Check headlight (LH) connector A-20 and front-
ECU connector A-07X for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are headlight (LH) connector A-20 and front-ECU 

connector A-07X in good condition?
YES : Go to Step 10.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204167

CONNECTOR : A-20

HARNESS 
SIDE

A-20(B)

A-20(B)

AI

2

1

Y

3

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-361

STEP 10. Check the wiring harness between headlight (LH) 
connector A-20 (terminal 1) and front-ECU connector A-
07X (terminal 6).
NOTE: Also check joint connector A-17 for loose, corroded, or 
damaged terminals, or terminals pushed back in the connector. 
If joint connector A-17 is damaged, repair or replace the dam-
aged component(s) as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between headlight (LH) connector 

A-20 (terminal 1) and front-ECU connector A-07X 
(terminal 6) in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the headlights illuminate normally.

STEP 11. Check headlight (RH) bulb.
(1) Remove the headlight (RH) bulb.
(2) Verify that the headlight (RH) bulb is not damaged or 

burned out.

Q: Is headlight (RH) bulb normal?

YES : Go to Step 12.
NO :  Replace the headlight (RH) bulb. Verify that the 

headlights illuminate normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204185

CONNECTORS : A-17, A-20

A-20(B)

A-17(GR)

AE

A-17

HARNESS SIDE

A-20(B)

2

1

Y

3

14

13

4

1112

5

3

10

8 9

2

7

1

6

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-362

STEP 12. Check headlight (RH) connector A-32 and front-
ECU connector A-07X for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are headlight (RH) connector A-32 and front-ECU 

connector A-07X in good condition?
YES : Go to Step 13.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlights illuminate normally.

STEP 13. Check the wiring harness between headlight (RH) 
connector A-32 (terminal 1) and front-ECU connector A-
07X (terminal 6).
Q: Is the wiring harness between headlight (RH) connector 

A-32 (terminal 1) and front-ECU connector A-07X 
(terminal 6) in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the headlights illuminate normally.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-32

HARNESS 
SIDE

A-32(B)

A-32(B)

AE

2

1

Y

3