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

INPUT SIGNAL PROCEDURES

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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

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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

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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