Mitsubishi Montero (2004+). Manual — part 805

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-477

STEP 1. 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 2.
NO : Refer to Inspection Procedure A-3 "Communication

with the ETACS-ECU is not possible

P.54B-42

."

STEP 2. Check ETACS-ECU connector D-224 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector D-224 in good condition?

YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The theft-alarm indicator light should

illuminate, and the theft-alarm system should be set
normally.

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-478

STEP 3. Check at ETACS-ECU connector D-224 in order to
check the theft-alarm indicator light circuit.
(1) Disconnect ETACS-ECU connector D-224, and measure at

the wiring harness side.

(2) The theft-alarm indicator light should illuminate when

terminal 40 is grounded.

Q: Does the theft-alarm indicator light illuminate?

YES : Go to Step 9.
NO : Go to Step 4.

STEP 4. Check theft-alarm indicator light connector D-105
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is theft-alarm indicator light connector D-105 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

. The theft-alarm indicator light should

illuminate, and the theft-alarm system should be set
normally.

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

AC100319AB

CONNECTOR D-224
(HARNESS SIDE)

AC204170

CONNECTOR : D-105

AL

HARNESS
SIDE

D-105(B)

D-105(B)

1

2

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-479

STEP 5. Check the theft-alarm indicator light.
(1) Remove the RV meter. Refer to GROUP 54A, RV meter

P.54A-286

.

(2) Disconnect theft-alarm indicator light connector D-105.

(3) The theft-alarm indicator light should illuminate when

battery voltage is applied between terminals 1 and 2.

Q: Does the theft-alarm indicator light illuminate?

YES : Go to Step 6.
NO : Replace the theft-alarm indicator light. The theft-alarm

indicator light should illuminate, and the theft-alarm
system should be set normally.

STEP 6. Check the fusible link (1) line of power supply
circuit to the theft-alarm indicator light circuit. Test at
theft-alarm indicator light connector D-105.
(1) Disconnect theft-alarm indicator light connector D-105 and

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

(2) Measure the voltage between terminal 2 and ground.

• The voltage should be approximately 12 volts (battery

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 8.
NO : Go to Step 7.

AC204170

CONNECTOR : D-105

AL

HARNESS
SIDE

D-105(B)

D-105(B)

1

2

ACX02296

AC204170

CONNECTOR : D-105

AL

HARNESS
SIDE

D-105(B)

D-105(B)

1

2

AC100067

1

2

AB

CONNECTOR D-105
(HARNESS SIDE)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-480

STEP 7. Check the wiring harness between theft-alarm
indicator light connector D-105 (terminal 1) and the fusible
link (1).

NOTE: Also check intermediate connector D-28 and joint con-
nector D-02 for loose, corroded, or damaged terminals, or ter-
minals pushed back in the connector. If intermediate connector
D-28 or joint connector D-02 is damaged, repair or replace the
damaged component(s) as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

Q: Is the wiring harness between theft-alarm indicator

light connector D-105 (terminal 1) and the fusible link (1)
in good condition?
YES : No action is necessary and testing is complete.
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. The
theft-alarm indicator light should illuminate, and the
theft-alarm system should be set normally.

ACX02274

FUSIBLE LINK (1)

AE

BATTERY

AC204170

CONNECTOR : D-105

AL

HARNESS
SIDE

D-105(B)

D-105(B)

1

2

AC204188

CONNECTORS: D-02, D-28

D-02

D-02

D-28

AB

D-28

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

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