Mitsubishi Montero (2002-2004). Manual — part 242

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-15

STEP 9. Check the wiring harness between ETACS-ECU
connector D-224 (terminal 21) and data link connector D-
117 (terminal 31).
NOTE: Also check joint connector D-02 for loose, corroded, or
damaged terminals, or terminals pushed back in the connector.
If joint connector D-02 is damaged, repair or replace the dam-
aged component(s) as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector D-

224 (terminal 21) and data link connector D-117
(terminal 31) in good condition?
YES : Replace the ETACS-ECU. The system should

communicate with the SWS monitor kit 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. The system
should communicate with the SWS monitor kit
normally.

AC204188

CONNECTORS : D-02, D-117

D-117

D-02

AD

D-02

D-117

HARNESS SIDE

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

21

26

22

27 2829 30

23

31

24

32

25

33

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

SWS SYMPTOM PROCEDURES

54Bb-16

INSPECTION PROCEDURE A-2: Communication with the column switch (column-ECU) is not
possible.

NOTE: This troubleshooting procedure requires the
use of scan tool MB991502 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54Ba-8

."

Column Switch Power Supply and SWS Communication Circuit

AC204170

CONNECTOR : D-28

BB

AC204172

CONNECTOR : D-203

AG

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-17

.

CIRCUIT OPERATION

• The power supply to the column switch is pro-

vided by the battery and the ignition switch (IG1).

• If the power supply system from the battery is

defective, the system operates by the power sup-
ply from the ignition switch (IG1).

.

TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit to the column switch (col-
umn-ECU) may be defective. If the battery power
supply circuit (terminal 1 of the column switch) to the
ECU is damaged, also check the power supply circuit
from the ignition switch (IG1) (terminal 9 of the col-
umn switch), and repair if necessary.

.

TROUBLESHOOTING HINTS

• The ETACS-ECU may be defective

• The column switch may be defective

• The wiring harness or connectors may have

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

AC204174

CONNECTOR : D-224

D-224(B)

AG

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-18

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS monitor kit

STEP 1. Use scan tool MB991502 to select "ECU COMM
CHK" on the SWS monitor display.
Check the following ECUs:

• ETACS-ECU

• Column-ECU

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) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Operate scan tool MB991502 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."

(5) Scan tool MB991502 should show "OK" on the "ECU

COMM CHK" menus for both the "ETACS ECU" and the
"COLUMN ECU" menus.

Q: Is "OK" displayed on both the "ETACS ECU" and

"COLUMN ECU" menus?
"OK" are displayed for all the items : Go to Step 2.
"NG" is displayed on the "COLUMN ECU" menu : Go to

Step 6.

"NG" is displayed on the "ETACS ECU" menu : Refer to

Inspection Procedure A-3 "Communication with
ETACS-ECU is not possible

P.54Bb-25

."

"NG" are displayed for all the items : Refer to Inspection

Procedure A-3 "Communication with ETACS-ECU is
not possible

P.54Bb-25

."

AC204222AB

16-pin

13-pin

MB991502

MB991862