Mitsubishi Montero (2004+). Manual — part 800

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-457

NOTE: Also check intermediate connectors D-26, D-28, junc-
tion block connectors D-207 and D-221 for loose, corroded, or
damaged terminals, or terminals pushed back in the connector.
If intermediate connector D-26, D-28, junction block connector
D-207 or D-221 is damaged, repair or replace the damaged
component(s) as described in GROUP, Harness Connector
Inspection

P.00E-2

.

Q: Is the wiring harness between rear personal light (RH)

connector F-04 (terminal 1) and fusible link (1) in good
condition?
YES : Go to Step 41.
NO : Repair the wiring harness. Verify that the rear

personal light (RH) illuminates normally.

AC204188

CONNECTORS : D-26, D-28

D-28

AH

D-26

D-28

D-26

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

2 3

1

7

6

12

11

8

13

5

4

9 10

AC204191

CONNECTORS : D-207, D-221

D-207

AB

HARNESS SIDE

HARNESS SIDE

D-221

D-207

D-221

3

1

4

6 5

7

8

2

1

2

3

4

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-458

STEP 41. Check the wiring harness between rear personal
light (RH) connector F-04 (terminal 2) and ground.

NOTE: Also check intermediate connectors D-26 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector D-26 is damaged, repair or
replace the damaged component(s) as described in GROUP,
Harness Connector Inspection

P.00E-2

.

Q: Is the wiring harness between rear personal light (LH)

connector (terminal 2) and ground in good condition?
YES : No action to be taken.
NO : Repair the wiring harness. Verify that the rear

personal light (RH) illuminates normally.

ACX02274

FUSIBLE LINK (1)

AE

BATTERY

AC204177

CONNECTOR: F-04

AO

HARNESS SIDE

F-04

AC204170

CONNECTOR : D-26

AG

2 3

1

7

6

12

11

8

13

5

4

9 10

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-459

INSPECTION PROCEDURE M-2: Interior Light: Dome light dimming function does not work normally.

NOTE: This troubleshooting procedure requires the
use of scan tool MB991958 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54B-10

."

.

CIRCUIT OPERATION
The ETACS-ECU operates the dome light dimming
function according to the following switches:

• Ignition switch (IG1)

• Key reminder switch

• Front door switches

• Driver's door lock actuator switch

.

TECHNICAL DESCRIPTION (COMMENT)
Is the dome lights do not dim normally, the input cir-
cuits from the switches described in "CIRCUIT
OPERATION" or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The key reminder switch may be defective

• The door switches may be defective

• The driver’s door lock actuator switch 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 Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

Interior Light Dimming Function

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-460

STEP 1. Verify the dome light.
If the dome light switch are moved to the "door interlock posi-
tion", the dome light should illuminate when either door is
opened.
Q: Do the dome light illuminate normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure M-1 "The dome light do

not illuminate or go out normally

P.54B-428

."

STEP 2. Use scan tool MB991958 to select "ECU COMM
CHK" on the SWS monitor display.
Check the ETACS-ECU.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect the special tool. Refer to "How to connect SWS

monitor

P.54B-7

.

(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate scan tool MB991958 according to the procedure

below to display "ECU COMM CHK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."

(4) Scan tool MB991958 should show "OK" on the "ECU

COMM CHK" menu for the "ETACS ECU" menu.

Q: Is "OK" displayed on the "ETACS ECU" menu?

YES : Go to Step 3.
NO : Refer to Inspection Procedure A-3 "Communication

with ETACS-ECU is not possible

P.54B-42

."

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)