Mitsubishi Evolution X. Manual — part 839
WINDSHIELD WIPER AND WASHER
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EXTERIOR
51-39
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. Use the scan tool MB991958 to check if an
ETACS-related diagnostic trouble code is set.
Connect the scan tool. Refer to "How to connect the scan tool
(M.U.T.-III)
."
Q: Is the diagnostic trouble code set?
YES : Diagnose the ETACS-ECU. Refer to Diagnostic
trouble code chart
NO : Go to Step 2.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
WINDSHIELD WIPER AND WASHER
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EXTERIOR
51-40
STEP 2. Using scan tool MB991958, check data list.
Check the input signal related to the windshield wiper opera-
tion.
• Ignition switch: ACC
• Operate the windshield wiper switch at each switch posi-
tion.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Troubleshoot the ETACS-ECU. Refer to ETACS,
Diagnosis - Inspection Procedure 12 "ETACS-ECU
does not receive any signal from the column switch
signal."
.
STEP 3. Check that the windshield wipers work.
Check that the windshield wipers work at high speed and the
mist mode.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Go to Step 10.
STEP 4. Check windshield wiper motor connector A-06 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield wiper motor connector A-06 in good
condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the windshield wiper operates
normally when the windshield wiper switch is moved
to each position.
Item No.
Item name
Windshield
wiper
switch
position
Normal
condition
Item 235
Front wiper
ACT
LO
ON
HI
INT
ON and
OFF
MIST
ON
Item 236
Front wiper
Lo/Hi
LO
OFF
HI
ON
INT
OFF
MIST
ON
WINDSHIELD WIPER AND WASHER
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EXTERIOR
51-41
STEP 5. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-06.
(2) Connect a battery to the windshield wiper motor as shown.
Then check if the windshield wiper motor operates normally
at high and low speeds.
Q: Does the windshield wiper motor operate normally?
YES : Go to Step 6.
NO : Replace the windshield wiper motor. Verify that the
windshield wiper operates normally when the
windshield wiper switch is moved to each position.
STEP 6. Measure the voltage at windshield wiper motor
connector A-06
(1) Disconnect the connector, and measure the voltage at the
wiring harness side.
(2) Ignition switch: ACC
(3) windshield wiper switch: LO
(4) Measure the voltage between A-06 windshield wiper motor
connector terminal No. 3 and body ground.
OK: Battery voltage
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Intermittent malfunction (Refer to GROUP 00
− How
to Use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction
NO : Go to Step 7.
STEP 7. Check ETACS-ECU connector C-304 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-304 in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the windshield wiper operates
normally when the windshield wiper switch is moved
to each position.
4 5
3
1 2
4 5
3
1 2
4 5
3
1 2
AC608787AB
Operation check
Low speed
High speed
AC608254CL
Harness side: A-06
WINDSHIELD WIPER AND WASHER
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EXTERIOR
51-42
STEP 8. Check the wiring harness between windshield
wiper motor connector A-06 (terminals 1) and ETACS-ECU
connector C-304 (terminals 6).
Q: Is the wiring harness between windshield wiper motor
connector A-06 (terminals 1) and ETACS-ECU connector
C-304 (terminals 6) in good condition?
YES : Go to Step 9.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the windshield wiper operates normally when the
windshield wiper switch is moved to each position.
STEP 9. Retest the system.
Check that the windshield wipers work normally by moving the
switch to each position.
Q: Is the check result normal?
YES : Intermittent malfunction (Refer to GROUP 00
− How
to Use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction
NO : Replace the ETACS-ECU.
STEP 10. Check the A-06 windshield wiper motor
connector
Q: Is the check result normal?
YES : Go to Step 11.
NO : Repair the connector concerned.
STEP 11. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-06.
(2) Connect a battery to the windshield wiper motor as shown.
Then check if the windshield wiper motor operates normally
at high and low speeds.
Q: Does the windshield wiper motor operate normally?
YES : Go to Step 12.
NO : Replace the windshield wiper motor. Verify that the
windshield wiper operates normally when the
windshield wiper switch is moved to each position.
4 5
3
1 2
4 5
3
1 2
4 5
3
1 2
AC608787AB
Operation check
Low speed
High speed
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