Mitsubishi Montero (2002-2004). Manual — part 305
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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General circuit diagram for the rear wiper and washer
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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INSPECTION PROCEDURE H-1: Rear Wiper and Washer: Rear wiper does not work at all.
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
Rear Wiper Drive Circuit
AC000759
CONNECTOR: D-111
AC
ACX02285
CONNECTOR: D-217
AP
JUNCTION BLOCK (FRONT VIEW)
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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.
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
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
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SWS SYMPTOM PROCEDURES
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DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991223: Scan Tool (MUT-II)
• MB991223: SWS Monitor Kit
STEP 1. Use scan tool MB991502 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 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) Turn the ignition switch to the "ON" position.
(4) Operate scan tool MB991502 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".
(5) Scan tool MB991502 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
."
"NG" is displayed on the "COLUMN ECU" menu : Refer
to Inspection Procedure A-2 "Communication with
column switch (column-ECU) is not possible
AC204222AB
16-pin
13-pin
MB991502
MB991862
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