Mitsubishi Montero (2004+). Manual — part 534

SIDE STEP LIGHT

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CHASSIS ELECTRICAL

54A-105

STEP 12. Check 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 assembly (RH) connector F-30 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 side step light illuminate

normally.

STEP 13. Check the wiring harness between side step
light assembly (RH) connector F-30 (terminal 1) and
ground.

Q: Is the wiring harness between side step light assembly

(RH) connector F-30 (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 14. Check the side step light bulb (LH: FRONT).
Q: Is the side step light bulb in good condition?

YES : Replace the side step light harness (LH). Refer to

P.54A-116

. Verify that the side step light illuminate

normally.

NO : Replace the bulb (LH: FRONT). Refer to

P.54A-115

.

Verify that the side step light illuminates normally.

STEP 15. Check the side step light bulb (LH: REAR).
Q: Is the side step light bulb in good condition?

YES : Replace the side step light harness (LH). Refer to

P.54A-116

. Verify that the side step light illuminate

normally.

NO : Replace the bulb (LH: REAR). Refer to

P.54A-115

.

Verify that the side step light illuminates normally.

AC204177

CONNECTOR : F-30

AH

HARNESS SIDE

F-30(B)

F-30(B)

1

2

AC204177

CONNECTOR : F-30

AH

HARNESS SIDE

F-30(B)

F-30(B)

1

2

SIDE STEP LIGHT

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CHASSIS ELECTRICAL

54A-106

STEP 16. Check the side step light bulb (RH: FRONT).
Q: Is the side step light bulb in good condition?

YES : Replace the side step light harness (RH). Refer to

P.54A-116

. Verify that the side step light illuminate

normally.

NO : Replace the bulb (RH: FRONT). Refer to

P.54A-115

.

Verify that the side step light illuminates normally.

STEP 17. Check the side step light bulb (RH: REAR).
Q: Is the side step light bulb in good condition?

YES : Replace the side step light harness (RH). Refer to

P.54A-116

. Verify that the side step light illuminate

normally.

NO : Replace the bulb (RH: REAR). Refer to

P.54A-115

.

Verify that the side step light illuminates normally.

INSPECTION PROCEDURE 3: The Side Step Light do not Illuminate Normally when the Door is
Unlocked or Locked.

Side Step Light-ECU Circuit

SIDE STEP LIGHT

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CHASSIS ELECTRICAL

54A-107

.

TECHNICAL DESCRIPTION (COMMENT)
If left or right side step light do not illuminate, the
input circuit from the ETACS-ECU or the side step
light-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The side step light-ECU may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check the central door lock system operation.
Q: Does the central door lock system work normally?

YES : Go to Step 2.
NO : Refer to GROUP 54B, Inspection Procedure C-1 "The

central door lock system does not work at all

P.54B-95

."

STEP 2. Check the side step light operation.

The side step light should operate when the doors are locked
and unlocked.
Q: Do the side step lights illuminate normally when the

doors are unlocked?
YES : Go to Step 3.
NO : Go to Step 5.

AC204170

CONNECTOR : D-137

AX

D-137(GR)

AC204173

CONNECTOR : D-217

AM

AC204174

CONNECTOR : D-222

AE

SIDE STEP LIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-108

STEP 3. Check side step light-ECU connector D-137 and
ETACS-ECU connector D-222 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is side step light-ECU connector D-137 and ETACS-ECU

connector D-222 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 side step light illuminate

normally.

STEP 4. Check the wiring harness between side step
light-ECU connector D-137 (terminal 3) and ETACS-ECU
connector D-222 (terminal 4).

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

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

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

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