Mitsubishi Montero (2002-2004). Manual — part 481
SIDE STEP LIGHT
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CHASSIS ELECTRICAL
54A-95
STEP 11. Check the wiring harness between side step
light-ECU connector D-137 (terminal 4) and side step light
assembly (RH) connector F-30 (terminal 2).
NOTE: Also check intermediate connector D-111 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector D-111 is damaged, repair
or replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between side step light-ECU
connector D-137 (terminal 4) and side step light
assembly (RH) connector F-30 (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.
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
AC204171
CONNECTOR : D-111
AC
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
SIDE STEP LIGHT
TSB Revision
CHASSIS ELECTRICAL
54A-96
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
. 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
. Verify that the side step light illuminate
normally.
NO : Replace the bulb (LH: FRONT). Refer to
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
. Verify that the side step light illuminate
normally.
NO : Replace the bulb (LH: REAR). Refer to
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-97
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
. Verify that the side step light illuminate
normally.
NO : Replace the bulb (RH: FRONT). Refer to
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
. Verify that the side step light illuminate
normally.
NO : Replace the bulb (RH: REAR). Refer to
.
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-98
.
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
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
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