Mitsubishi Montero (2002-2004). Manual - part 372

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-35

STEP 2. Check the windshield wiper and washer switch.
Remove the windshield wiper and washer switch. Then check 
continuity between the switch terminals.

Q: Are the windshield wiper and washer switch in good 

condition?
YES : Go to Step 3.
NO :  Replace the column switch. If the equipment, which 

are described in "CIRCUIT OPERATION", work 
normally, the input signal from the column switch 
(windshield wiper and washer switch) should be 
normal.

SWITCH POSITION TESTER CONNECTION SPECIFIED 

CONDITION

OFF

4 

− 6, 5 − 6, 6 − 7, 6 − 8, 

6 

− 9, 6 − 10, 6 − 11

Open circuit

Windshield mist 
wiper switch

6 

− 11

Less than 2 
ohms

Windshield 
intermittent wiper 
switch

6 

− 10

Less than 2 
ohms

Windshield low-
speed wiper switch

6 

− 9

Less than 2 
ohms

Windshield high-
speed wiper switch

6 

− 8

Less than 2 
ohms

Windshield washer 
switch

6 

− 7

Less than 2 
ohms

Rear wiper switch

4 

− 6

Less than 2 
ohms

Rear washer switch 5 

− 6

Less than 2 
ohms

1

6

8

11

10

9

7

5

4

3

2

AC000417

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-36

STEP 3. 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 switch body in good condition?

YES : Go to Step 4.
NO :  Replace the column switch. If the equipment, which 

are described in "CIRCUIT OPERATION", work 
normally, the input signal from the column switch 
(windshield wiper and washer switch) should be 
normal.

STEP 4. Replace the ECU.
(1) Replace the column switch (turn-signal light and lighting 

switch).

(2) If the equipment, which are described in "CIRCUIT 

OPERATION", work normally, the input signal from the 
column switch (windshield wiper and washer switch) should 
be normal.

Q: Does the column switch (windshield wiper and washer 

switch) send a normal signal to the ECU?
YES : No action is necessary and testing is complete.
NO :  Replace the ETACS-ECU. If the equipment, which are 

described in "CIRCUIT OPERATION", work normally, 
the input signal from the column switch (windshield 
wiper and washer switch) should be normal.

SWITCH BODY

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Lighting switch side 

− 

Windshield wiper and 
washer switch side

4 

− 4,

5 

− 5,

6 

− 6,

7 

− 7,

8 

− 8,

9 

− 9,

10 

− 10,

11 

− 11

Less than 2 ohms

ACX00803

LIGHTING 
SWITCH SIDE

WINDSHIELD 
WIPER AND 
WASHER 
SWITCH SIDE

AC

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-37

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

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

."

.

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

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

SWS INPUT SIGNAL PROCEDURES

54Bc-38

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS monitor kit

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