Mitsubishi Montero (2002-2004). Manual - part 333

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-379

STEP 4. Check the wiring harness between daytime 
running light-ECU connector A-40 (terminal 1) and battery.
Q: Is the wiring harness between daytime running light-

ECU connector A-40 (terminal 1) and battery 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. The daytime 
running light function should now work normally.

STEP 5. Check the ground circuit to the daytime running 
light-ECU. Test at daytime running light-ECU connector A-
40.
(1) Disconnect daytime running light-ECU connector A-40 and 

measure the resistance available at the wiring harness side 
of the connector.

(2) Measure the resistance value between terminal 6 and 

ground.

• The resistance should measure 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 8.
NO :  Go to Step 6.

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

AC204466

5

6

3 2

4

1

CONNECTOR: A-40
(HARNESS SIDE)

AB

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-380

STEP 6. Check daytime running light-ECU connector A-40 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is daytime running light-ECU connector A-40 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

. The daytime running light function should 

now work normally.

STEP 7. Check the wiring harness between daytime 
running light-ECU connector A-40 (terminal 6) and ground.
Q: Is the wiring harness between daytime running light-

ECU connector A-40 (terminal 6) 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. The daytime 
running light function should now work normally.

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-381

STEP 8. Check the ignition switch (IG2) line of the power 
supply circuit to the daytime running light-ECU. Test at 
daytime running light-ECU connector A-40.
(1) Disconnect daytime running light-ECU connector A-40 and 

measure the voltage available at the wiring harness side of 
the connector.

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

(3) Measure the voltage between terminal 2 and ground.

• The voltage should measure approximately 12 volts 

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check daytime running light-ECU connector A-40 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is daytime running light-ECU connector A-40 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

. The daytime running light function should 

now work normally.

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

5

6

3 2

4

1

AC204467

CONNECTOR: A-40
(HARNESS SIDE)

AB

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-382

STEP 10. Check the wiring harness between daytime 
running light-ECU connector A-40 (terminal 2) and the 
ignition switch (IG2).

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5