Mitsubishi Montero (2004+). Manual — part 752

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-265

INSPECTION PROCEDURE H-1: Rear Wiper and Washer: Rear wiper does not work at all.

NOTE: This troubleshooting procedure requires use
of scan tool MB991958 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54B-10

."

Rear Wiper Drive Circuit

AC000759

CONNECTOR: D-111

AC

ACX02285

CONNECTOR: D-217

AP

JUNCTION BLOCK (FRONT VIEW)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-266

.

CIRCUIT OPERATION

• The rear wiper switch sends a signal through the

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

• The ETACS-ECU operates the rear wiper accord-

ing to the following switches:

• Ignition switch (ACC)

• Rear wiper switch

.

TECHNICAL DESCRIPTION (COMMENT)
If the rear wiper does not work normally, the input cir-
cuit system from the switches, the rear wiper motor,
the column switch (windshield wiper and windshield
washer switch) or the ETACS-ECU may be defective
(refer to "CIRCUIT OPERATION").

.

TROUBLESHOOTING HINTS

• The rear wiper motor may be defective

• The column switch may be defective (windshield

wiper and washer switch)

• 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

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• 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

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

ACX02286

CONNECTOR: D-222

AC

JUNCTION BLOCK (REAR VIEW)

AC204524

CONNECTOR: G-10

AB

G-10

ACX02293

CONNECTOR: I-07

AP

I-07(B)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-267

STEP 1. Use scan tool MB991958 to select "ECU COMM
CHK" on the SWS monitor display.
Check the following ECUs:

• ETACS-ECU

• Column-ECU

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect the special tool. Refer to "How to connect SWS

monitor

P.54B-7

.

(2) Turn the ignition switch to the "ON" position.
(3) Operate scan tool MB991958 according to the procedure

below to display "ECU COMM CHECK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK".

(4) Scan tool MB991958 should show "OK" on the "ECU

COMM CHK" menus for both the "COLUMN ECU", and the
"ETACS ECU" menus.

Q: Is "OK" displayed on both the "ETACS ECU" and

"COLUMN ECU" menus?
"OK" is displayed for all the items : Go to Step 2.
"NG" is displayed on the "ETACS ECU" menu : Refer to

Inspection Procedure A-3 "Communication with
ETACS-ECU is not possible

P.54B-42

."

"NG" is displayed on the "COLUMN ECU" menu : Refer

to Inspection Procedure A-2 "Communication with
column switch (column-ECU) is not possible

P.54B-35

."

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-268

STEP 2. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Check the input signals from the following switches:

• Ignition switch: ACC

• Rear wiper switch: INT

Operate scan tool MB991958 according to the procedure below
to display "REAR WIPER."

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

Check that normal conditions are displayed on the items
described in the table below.

Q: Are normal conditions displayed for "REAR WIPER SW"

and "IG SW (ACC)"?
Normal conditions are displayed for all the items : Go to

Step 3.

Normal condition is not displayed "REAR WIPER SW" :

Refer to Inspection Procedure O-7 "ETACS-ECU
does not receive a signal from the rear wiper switch

P.54B-529

."

Normal condition is not displayed for "IG SW (ACC)" :

Refer to Inspection Procedure O-1 "ETACS-ECU
does not receive a signal from the ignition switch
(ACC)

P.54B-502

."

STEP 3. Check the rear wiper motor connector I-07 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is rear wiper motor connector I-07 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

. Verify that the rear wiper works normally.

ITEM NO.

ITEM NAME

NORMAL
CONDITION

ITEM 13

REAR WIPER SW ON

ITEM 31

IG SW (ACC)

ON

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

ACX02293

CONNECTOR: I-07

AR

I-07(B)

I-07(B)

(HARNESS SIDE)

1

2

3

4