Mitsubishi Montero (2002-2004). Manual - part 337

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-395

STEP 4. Check the battery power supply circuit to the 
ETACS-ECU. Test at ETACS-ECU connector D-222.
(1) Disconnect ETACS-ECU connector D-222 and measure the 

voltage available at the junction block side of the connector.

(2) Measure the voltage between terminal 11 and ground.

• The voltage should be approximately 12 volts (battery 

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Replace the ETACS-ECU. Verify that the turn-signal 

lights illuminate normally.

NO :  Go to Step 5.

STEP 5. Check ETACS-ECU connector D-222 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector D-222 in good condition?

YES : Go to Step 6.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the turn-signal lights illuminate 

normally.

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

ACX01589

19

20

1817 1615 141312 1110 9 8 7

6 5 4 3 2 1

AB

CONNECTOR D-222
(JUNCTION BLOCK SIDE)

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

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-396

STEP 6. Check the wiring harness between ETACS-ECU 
connector D-222 (terminal 11) and the battery.

NOTE: Also check intermediate connector D-28 and junction 
block connector D-221 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate 
connector D-28 or junction block connector D-221 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 ETACS-ECU connector D-

222 (terminal 11) and the battery 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. Verify that 
the turn-signal lights illuminate normally.

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-28

AI

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

AC204173

CONNECTOR : D-221

AJ

HARNESS SIDE

3

1

4

6 5

7

8

2

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-397

STEP 7. Check the input signal by using "FUNCTION 
DIAG." menu of the SWS monitor.
Check the input signals from the following switches:

• Ignition switch: ON

• Turn-signal light switch: RH

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector 

(16-pin).

(2) Connect SWS monitor kit MB991862 to the data link 

connector (13-pin).

(3) Operate scan tool MB991502 according to the procedure 

below to display "TURN SIG.RH."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "TURN SIGNAL."
6. Select "TURN SIG.RH."

(4) Check that normal conditions are displayed on the items 

described in the table below.

Q: Are normal conditions displayed on the "T/S RH SW" 

and "IG SW (IG1)"?
YES : Go to Step 8.
NO : 

• Normal condition is not displayed on the "T/S RH 

SW": Refer to Inspection Procedure O-6 "ETACS-
ECU does not receive any signal from the turn-
signal RH switch 

P.54Bc-31

."

• Normal condition is not displayed on the "IG SW 

(IG1)": Refer to Inspection Procedure O-2 
"ETACS-ECU does not receive any signal from 
the ignition switch (IG1) 

P.54Bc-7

."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 10

T/S RH SW 

ON

ITEM 30

IG SW (IG1)

ON

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-398

STEP 8. Check the input signal by using "FUNCTION 
DIAG." menu of the SWS monitor.
If the Ignition switch is turned to the "ON" position and the turn-
signal light switch (LH) is turned on, normal conditions should 
be displayed on the items described in the table below.
Operate scan tool MB991502 according to the procedure below 
to display "TURN SIG.LH."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "TURN SIGNAL."
6. Select "TURN SIG.LH."

Q: Do the scan tool display the items "T/S LH SW" is 

normal condition?
YES : Replace the ETACS-ECU. Verify that the turn-signal 

lights illuminate normally.

NO :   Refer to Inspection Procedure O-6 "ETACS-ECU 

does not receive any signal from the taillight switch, 
the headlight switch, the passing light switch, the 
dimmer switch, the turn-signal light switch or switch 

P.54Bc-31

."

ITEM NO.

ITEM NAME

NORMAL 
CONDITION

ITEM 11

T/S LH SW 

ON

AC204222AB

16-pin

13-pin

MB991502

MB991862