Mitsubishi Montero (2002-2004). Manual — part 480

SIDE STEP LIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-91

STEP 3. Check the ground circuit to the side step light
assembly (LH). Test at side step light assembly (LH)
connector F-31.
(1) Disconnect side step light assembly (LH) connector F-31

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

(2) Measure the resistance value between terminal 1 and

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

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

STEP 4. Check side step light-ECU connector D-137 and
side step light assembly (LH) connector F-31 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is side step light-ECU connector D-137 and side step

light assembly (LH) connector F-31 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 side step light illuminate

normally.

AC204178

CONNECTOR : F-31

AG

HARNESS SIDE

F-31(B)

F-31(B)

1

2

1

2

AC204602

CONNECTOR F-31
(HARNESS SIDE)

AB

AC204170

CONNECTOR : D-137

HARNESS SIDE

D-137(GR)

D-137(GR)

AR

1

2

8 7

4

5

10

11

12

6

9

3

AC204178

CONNECTOR : F-31

AG

HARNESS SIDE

F-31(B)

F-31(B)

1

2

SIDE STEP LIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-92

STEP 5. Check the wiring harness between side step light-
ECU connector D-137 (terminal 4) and side step light
assembly (LH) connector F-31 (terminal 2).
NOTE: Also check intermediate connector D-125 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector D-125 is damaged, repair
or replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

Q: Is the wiring harness between side step light-ECU

connector D-137 (terminal 4) and side step light
assembly (LH) connector F-31 (terminal 2) in good
condition?
YES : Replace the side step light-ECU. Verify that the side

step light 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 side step light illuminate normally.

STEP 6. Check side step light assembly (LH) connector F-
31 for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is side step light assembly (LH) connector F-31 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 side step light illuminate

normally.

AC204188

CONNECTORS : D-125, D-137

D-137(GR)

AM

HARNESS SIDE

D-137(GR)

D-125

D-125

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

1

2

8 7

4

5

10

11

12

6

9

3

AC204178

CONNECTOR : F-31

AG

HARNESS SIDE

F-31(B)

F-31(B)

1

2

AC204178

CONNECTOR : F-31

AG

HARNESS SIDE

F-31(B)

F-31(B)

1

2

SIDE STEP LIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-93

STEP 7. Check the wiring harness between side step light
assembly (LH) connector F-31 (terminal 1) and ground.
Q: Is the wiring harness between side step light assembly

(LH) connector F-31 (terminal 1) and the ground in good
condition?
YES : Replace the side step light-ECU. Verify that the side

step light 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 side step light illuminate normally.

STEP 8. Check the side step light operation.
(1) Disconnect side step light assembly (RH) connector F-30.
(2) When battery voltage is applied between the terminals,

check that the side step light (RH) illuminate.

Q: Is side step light (RH) illuminate?

YES : Go to Step 9.
NO : Replace the side step light harness. Verify that the

side step light illuminate normally.

STEP 9. Check the ground circuit to the side step light
assembly (RH). Test at side step light assembly (RH)
connector F-30.
(1) Disconnect side step light assembly (RH) connector F-31

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

(2) Measure the resistance value between terminal 1 and

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 10.
NO : Go to Step 12.

AC204178

CONNECTOR : F-31

AG

HARNESS SIDE

F-31(B)

F-31(B)

1

2

1 2

AC204221

SIDE STEP
ASSEMBLY

AB

AC204177

CONNECTOR : F-30

AH

HARNESS SIDE

F-30(B)

F-30(B)

1

2

1

2

AC204602

CONNECTOR F-30
(HARNESS SIDE)

AC

SIDE STEP LIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-94

STEP 10. Check side step light-ECU connector D-137 and
side step light assembly (RH) connector F-30 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is side step light-ECU connector D-137 and side step

light assembly (RH) connector F-30 in good condition?
YES : Go to Step 11.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the side step light illuminate

normally.

AC204170

CONNECTOR : D-137

HARNESS SIDE

D-137(GR)

D-137(GR)

AR

1

2

8 7

4

5

10

11

12

6

9

3

AC204177

CONNECTOR : F-30

AH

HARNESS SIDE

F-30(B)

F-30(B)

1

2