Mitsubishi Montero (2004+). Manual - part 819

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-533

INSPECTION PROCEDURE O-8: Column Switch: ETACS-ECU does not receive any signal from the 
windshield intermittent wiper interval adjusting knob.

.

CIRCUIT OPERATION
The ETACS-ECU calculates the windshield intermit-
tent wiper interval according to the position of the 
windshield intermittent wiper interval adjusting knob, 
which is incorporated in column switch (windshield 
wiper and washer switch).

.

TECHNICAL DESCRIPTION (COMMENT)
If the windshield intermittent wiper interval can not be 
adjusted, the column switch or the ETACS-ECU may 
be defective.

.

TROUBLESHOOTING HINTS

• The column switch (windshield wiper and washer 

switch) 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

Windshield Intermittent Wiper Interval Adjusting Knob Input Circuit

AC204172

CONNECTOR : D-203

AG

AC204174

CONNECTOR : D-224

D-224(B)

AG

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-534

• MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

STEP 1. Check the windshield intermittent wiper interval 
adjusting knob.
(1) Remove the windshield wiper and washer switch, and 

check at the switch side.

(2) Measure the resistance value between terminals 3 and 6. 

The measured resistance should change smoothly from 
approximately 0 ohm ("FAST" position) to 1 kiloohm 
("SLOW" position).

Q: Is the windshield intermittent wiper interval adjusting 

knob in good condition?
YES : Go to Step 2.
NO :  Replace the column switch (windshield wiper and 

washer switch). If the wiper interval can be adjusted 
normally, it indicates that the windshield intermittent 
wiper interval adjusting knob should send a signal to 
the ECU.

STEP 2. Check the column switch body.
Remove the turn-signal light and lighting switch and windshield 
wiper and washer switch. Then check continuity between the 
switch body terminals.

Q: Is the column switch body in good condition?

YES : Go to Step 3.
NO :  Replace the column switch body. If the wiper interval 

can be adjusted normally, it indicates that the 
windshield intermittent wiper interval adjusting knob 
should send a signal to the ECU.

1

6

8

11

10

9

7

5

4

3

2

AC000417

SWITCH BODY

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Lighting switch side 

− 

Windshield wiper and 
washer switch side

3 

− 3,

6 

− 6

Less than 2 ohms

ACX00803

LIGHTING 
SWITCH SIDE

WINDSHIELD 
WIPER AND 
WASHER 
SWITCH SIDE

AC

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-535

STEP 3. Check column switch connector D-203 and 
ETACS-ECU connector D-224 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are column switch connector D-203 and ETACS-ECU 

connector D-224 in good condition?
YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the wiper interval can be adjusted 

normally, it indicates that the windshield intermittent 
wiper interval adjusting knob should send a signal to 
the ECU.

STEP 4. Check the wiring harness between column switch 
connector D-203 (terminal 6) and ETACS-ECU connector 
D-224 (terminal 34).
Q: Is the wiring harness between column switch connector 

D-203 (terminal 6) and ETACS-ECU connector D-224 
(terminal 34) in good condition?
YES : Go to Step 5.
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 wiper 
interval can be adjusted normally, it indicates that the 
windshield intermittent wiper interval adjusting knob 
should send a signal to the ECU.

AC204172

CONNECTOR : D-203

AC

HARNESS SIDE

1

2

3

7

8

6

5

10

4

9

D-203

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

AC204172

CONNECTOR : D-203

AC

HARNESS SIDE

1

2

3

7

8

6

5

10

4

9

D-203

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-536

STEP 5. Replace the ECU.
(1) Replace the ETACS-ECU.
(2) If the wiper interval can be adjusted normally, it indicates 

that the windshield intermittent wiper interval adjusting knob 
should send a signal to the ECU.

Q: Can input signal be confirmed when the windshield 

intermittent wiper interval adjusting knob is operated?
YES : No action is necessary and testing is complete.
NO :  Replace the column switch (windshield wiper and 

washer switch). If the wiper interval can be adjusted 
normally, it indicates that the windshield intermittent 
wiper interval adjusting knob should send a signal to 
the ECU.