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

TSB Revision

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

TSB Revision

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

TSB Revision

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