Mitsubishi Montero (2004+). Manual — part 821

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-541

NOTE: Also check intermediate connectors F-24, D-26 and
joint connector D-02 for loose, corroded, or damaged terminals,
or terminals pushed back in the connector. If intermediate con-
nector F-24, D-26 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 sunroof motor assembly

connector F-02 (terminal 10) and ETACS-ECU connector
D-224 (terminal 21) in good condition?
YES : Go to Step 4.
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. If the sunroof
operates normally, it indicates that a correct signal is
sent from the sunroof switch.

STEP 4. Replace the ECU.
(1) Replace the sunroof motor assembly.
(2) If the sunroof operates normally, it indicates that a correct

signal is sent from the sunroof switch.

Q: Does the ETACS-ECU receive correct signals from the

sunroof switch?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. If the sunroof operates

normally, it indicates that a correct signal is sent from
the sunroof switch.

AC204188

CONNECTORS : D-02, D-26

D-26

D-02

AE

D-02

D-26

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

1

7

6

12

11

8

13

5

4

9 10

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-542

INSPECTION PROCEDURE O-10: RV Meter: ETACS-ECU does not receive any signal from any control
switches.

.

CIRCUIT OPERATION
The RV meter sends a tone alarm request signal to
the SWS communication line. If the ETACS-ECU
receives the request signal, it sound its tone alarm.

.

TECHNICAL DESCRIPTION (COMMENT)
If the SWS communication line between the RV
meter and the ETACS-ECU is defective, the
ETACS-ECU can not identify any input signals from
the RV meter even if the RV meter is normal.

.

TROUBLESHOOTING HINTS

• The RV meter 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)

RV Meter Any Control Switch Circuit

AC204170

CONNECTORS : D-02, D-08

BG

D-08(B)

D-02

AC204174

CONNECTOR : D-224

D-224(B)

AG

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-543

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

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

STEP 1. Check the RV meter.
Q: Does the RV meter work normally?

YES : Go to Step 2.
NO : First, repair the RV meter. Refer to GROUP 54A, RV

meter

P.54A-286

.

STEP 2. Check RV meter connector D-08 and ETACS-ECU
connector D-224 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are RV meter connector D-08 and 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

. If the RV meter operating sound function

works normally, it indicates that a correct signal is
sent from the RV meter switch.

AC204170

CONNECTOR : D-08

AE

D-08(B)

HARNESS
SIDE

D-08(B)

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15

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

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-544

STEP 3. Check the wiring harness between RV meter
connector D-08 (terminal 6) and ETACS-ECU connector
D-224 (terminal 21).

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 RV meter connector D-08

(terminal 6) and ETACS-ECU connector D-224 (terminal
21) in good condition?
YES : Go to Step 4.
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. If the RV
meter works normally, it indicates that a correct signal
is sent from the RV meter switch.

AC204188

CONNECTORS : D-02, D-08

D-08(B)

D-02

AC

D-02

D-08(B)

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

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15

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