Mitsubishi Montero (2002-2004). Manual - part 339

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-403

DIAGNOSIS

Required Special Tool:

• MB991223: Test Harness Set 

STEP 1. Verify the hazard warning light.
Q: Which turn-signal light does not illuminate?

Front turn-signal light (LH) : Go to Step 2.
Front turn-signal light (RH) : Go to Step 8.
Rear combination light (LH) : Go to Step 14.
Rear combination light (RH) : Go to Step 20.
Combination meter (LH) : Go to Step 26.
Combination meter (RH) : Go to Step 28.
Combination meter (both RH and LH) : Go to Step 30.
Front turn-signal light (LH) and combination meter (LH) 
: 

Go to Step 32.

LH side only : Refer to Inspection Procedure K-1 "Turn-

signal lights does not flash when the turn-signal light 
switch is turned on 

P.54Bb-392

."

RH side only : Refer to Inspection Procedure K-1 "Turn-

signal lights does not flash when the turn-signal light 
switch is turned on 

P.54Bb-392

."

Both LH and RH sides : Refer to Inspection Procedure K-2 

"Hazard warning light does not illuminate 

P.54Bb-

399

."

STEP 2. Check the front turn-signal light bulb (LH).
(1) Remove the front turn-signal (LH) light bulb.
(2) Verify that the front turn-signal light bulb (LH) is not 

damaged or burned out.

Q: Is the front turn-signal (LH) light bulb in good 

condition?
YES : Go to Step 3.
NO :  Replace the front turn-signal (LH) light bulb. Verify 

that the turn-signal lights illuminate normally.

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-404

STEP 3. Check the ground circuit to the front combination 
light (LH). Test at front combination light (LH) connector A-
19. 
(1) Disconnect front combination light (LH) connector A-19 and 

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

(2) Measure the resistance value between terminal 2 and 

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 4.

STEP 4. Check front turn-signal light (LH) connector A-19 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is the front turn-signal light (LH) connector A-19 in good 

condition?
YES : Go to Step 5.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the turn-signal lights illuminate 

normally.

AC204167

CONNECTOR : A-19

HARNESS 
SIDE

A-19(B)

A-19(B)

AH

1

2

AC204786

1

2

AB

CONNECTOR A-19
(HARNESS SIDE)

AC204167

CONNECTOR : A-19

HARNESS 
SIDE

A-19(B)

A-19(B)

AH

1

2

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-405

STEP 5. Check the wiring harness between front turn-
signal light (LH) connector A-19 (terminal 2) and ground.
Q: Is the wiring harness between front turn-signal light 

(LH) connector A-19 (terminal 2) and ground in good 
condition?
YES : Replace the socket. Verify that the turn-signal lights 

illuminate normally.

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 turn-signal lights illuminate normally.

STEP 6. Check front turn-signal light (LH) connector A-19 
and ETACS-ECU connector D-222 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q:  Are front turn-signal light (LH) connector A-19 and 

ETACS-ECU connector D-222 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 turn-signal lights illuminate 

normally.

AC204167

CONNECTOR : A-19

HARNESS 
SIDE

A-19(B)

A-19(B)

AH

1

2

AC204167

CONNECTOR : A-19

HARNESS 
SIDE

A-19(B)

A-19(B)

AH

1

2

AC204174

CONNECTOR : D-222

AB

1

2

3

5

6

4

9 8

121110

13

15 14

16

17

7

19

20

18

JUNCTION BLOCK SIDE

D-222

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-406

STEP 7. Check the wiring harness between front turn-
signal light (LH) connector A-19 (terminal 1) and ETACS-
ECU connector D-222 (terminal 15).

AC204185

CONNECTORS : A-16, A-19

A-19(B)

A-16

AD

A-16

HARNESS SIDE

A-19(B)

1

2

5 6

2 3 4

1

AC204174

CONNECTOR : D-222

AB

1

2

3

5

6

4

9 8

121110

13

15 14

16

17

7

19

20

18

JUNCTION BLOCK SIDE

D-222