Mitsubishi Montero (2002-2004). Manual — part 308

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-279

INSPECTION PROCEDURE H-3: Rear Wiper and Washer: When the selector lever is moved to "R"
position during the rear wiper operation, the rear wiper does not operate at the continuous mode.

NOTE: This troubleshooting procedure requires 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 operates the rear wiper consecu-
tively approximately twice when the selector lever is
moved to "R" position while the rear wiper is turned
on.

.

TECHNICAL DESCRIPTION (COMMENT)
If the rear wiper does not work consecutively approx-
imately twice, the transmission range switch ("R"
position) or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The transmission range switch may be defective

• The ETACS-ECU may be defective

• The wiring harness may be damaged or the con-

nectors may have loose, corroded or damaged
terminals, pushed back in the connector

"R" Position during Rear Wiper Operation Circuit

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-280

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS Monitor Kit

STEP 1. Verify the rear wiper operation.
Q: Does the rear wiper operate normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure H-1 "Rear wiper does

not work at all

P.54Bb-268

."

STEP 2. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Set each switch to the following condition before checking input
signal from the transmission range switch ("R" position).

• Ignition switch: ON

• Rear wiper switch: ON

• Shift position: "R" position

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector

(16-pin).

(2) Connect SWS monitor kit MB991862 to the data link

connector (13-pin).

(3) Operate scan tool MB991502 according to the procedure

below to display "REV. INTERLOCK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "REAR WIPER."
6. Select "REV. INTERLOCK."

(4) Check that normal conditions are displayed on the item

described in the table below.

Q: Are normal conditions displayed?

YES : Replace the ETACS-ECU. When the selector lever is

moved to the "R" position, the rear wiper should
operate consecutively approximately twice.

NO : Refer to Inspection Procedure O-4 "ETACS-ECU

does not receive "R" position signal from the
transmission range switch

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."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 41

PNP SW (R)

ON

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-281

INSPECTION PROCEDURE H-4: Rear Wiper and Washer: Rear washer does not operate.

NOTE: This troubleshooting procedure requires 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

."

Rear Washer Drive Circuit

AC000759

CONNECTOR: D-111

AC

ACX02285

CONNECTOR: D-221

AU

JUNCTION BLOCK (FRONT VIEW)

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-282

.

CIRCUIT OPERATION
The rear washer switch sends a signal through the
column-ECU (incorporated in the column switch) to
the ETACS-ECU. If the column-ECU sends a rear
washer switch "ON" signal to the ETACS-ECU, the
ETACS-ECU turns on the relay (incorporated in the
ETACS-ECU), thus causing the rear washer motor to
be turned on.

.

TECHNICAL DESCRIPTION (COMMENT)
If the rear washer does not work normally, the rear
washer motor, the column switch (windshield wiper
and washer switch) or the front-ECU may be defec-
tive.

.

TROUBLESHOOTING HINTS

• The rear washer motor may be defective

• The column switch (windshield wiper and washer

switch) may be defective

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS Monitor Kit

STEP 1. Verify the rear wiper operation.
Q: Does the rear wiper operate normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure H-1 "Rear wiper does

not work at all

P.54Bb-268

."

ACX02286

CONNECTOR: D-222

AC

JUNCTION BLOCK (REAR VIEW)

ACX02290

CONNECTOR: G-10

AB

ACX02293

CONNECTOR: I-08

AE