Mitsubishi Evolution X. Manual — part 498
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CIRCUIT OPERATION
When you operate each power window switch for
front or rear passengers (incorporated in the power
window main switch), the corresponding power win-
dow motor operates, opening or closing each power
window.
.
TECHNICAL DESCRIPTION (COMMENT)
If the corresponding power window opens and closes
normally when each power window sub-switch is
operated, the power window main switch may be
defective.
.
TROUBLESHOOTING HINT
• The power window main switch may be defective
• The front power window sub switch may be
defective
• The rear power window sub switches 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
DIAGNOSTIC PROCEDURE
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the power window main switch.
Check that the driver's power window works by means of the
power window main switch.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Refer to inspection procedure 2 "Driver's power
window does not work by means of the power window
main switch
AC708950AS
Connector: C-128
AC708972AU
Connector: C-315
ETACS-ECU
AC608167AM
Connector: E-15
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STEP 2. Check the power window sub switch.
Check that each power window works by means of the respec-
tive power window sub switch when the power window lock
switch is turned off.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to inspection procedure 3 "Relevant power
window(s) does not work by means of the front and
rear passenger's power window sub switches
."
STEP 3. Check the power supply system.
With the ignition switch in the LOCK (OFF) position, check if
the following function operates normally:
• Hazard warning light
Q: Is the check result normal?
YES : Go to Step 4.
NO : Refer to GROUP 54A
− Malfunction of ETACS-ECU
power supply circuit
STEP 4. Using scan tool MB991958, read the diagnostic
trouble code.
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 scan tool MB991958. Refer to "How to connect
scan tool (M.U.T.-III)
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU. Refer to GROUP 54B,
Diagnostic trouble code chart
NO : Go to Step 5.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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STEP 5. Check power window main switch connector E-15
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is power window main switch connector E-15 in good
condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. When the power window main switch is
operated, the front and/or rear passenger's power
windows should raise and lower normally.
STEP 6. Check the ETACS-ECU connector C-315 line
circuit to the power window main switch. Measure the
voltage at power window main switch connector E-15.
(1) Disconnect power window main switch connector E-15 and
measure the voltage available at the wiring harness side of
the connector.
(2) Measure the voltage between terminal 4 and ground.
• The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 9.
NO : Go to Step 7.
STEP 7. Check ETACS-ECU connector C-315 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-315 in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. When the When the power window main
switch is operated, the front and/or rear passenger's
power windows should raise and lower normally.
AC208730 BS
Connector E-15
(harness side)
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STEP 8. Check the wiring harness between ETACS-ECU
connector C-315 (terminal No. 8) and power window main
switch connector E-15 (terminal No. 4).
NOTE: Also check intermediate connector C-128. If intermedi-
ate connector C-128 is damaged, repair or replace the dam-
aged component(s) as described in GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between ETACS-ECU connector
C-315 (terminal No. 8) and power window main switch
connector E-15 (terminal No. 4) in good condition?
YES : No action is necessary and testing is complete.
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. When the
When the power window main switch is operated, the
front and/or rear passenger's power windows should
raise and lower normally.
STEP 9. Retest the system.
Replace the power window main switch. Check that the front
and/or rear passenger's power windows work by means of the
power window main switch.
Q: Is the check result normal?
YES : No action is necessary and testing is complete.
NO : Replace ETACS-ECU. Check that the power window
works normally.
INSPECTION PROCEDURE 5: The Power Window Timer Function does not work Normally.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
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COMMENTS ON TROUBLE SYMPTOM
If the power window timer does not work normally, a
malfunction of the power window main switch or
ETACS-ECU is suspected.
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PROBABLE CAUSES
• Malfunction of the front door switch (LH)
• Malfunction of the front door switch (RH)
• Malfunction of the power window main switch
• Malfunction of ETACS-ECU
• Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
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