Mitsubishi Evolution X. Manual — part 493
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INSPECTION PROCEDURE 2: Driver's Power Window does not work by means of The Power Window
Main Switch.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
.
CIRCUIT OPERATION
The front power window motor (LH) receives a signal
("UP", "DOWN", "AUTO UP" or "AUTO DOWN") from
the front power window main switch and controls the
driver’s power window.
.
TECHNICAL DESCRIPTION (COMMENT)
The power window main switch or the front power
window motor (LH) may be defective.
.
AC609756
FRONT
POWER
WINDOW
MOTOR (LH)
FRONT
(LH)
CPU
IC
IC
LIN DRIVE
CIRCUIT
POWER WINDOW MAIN SWITCH
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLUE
BLUE
ORANGE
LIGHT GREEN
GREEN
VIOLET
AC
Driver's Side Power Window Circuit
AC608167AO
Connectors: E-14, E-15
E-15
E-14 (GR)
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TROUBLESHOOTING HINTS
• The power window main switch may be defective
• The front power window motor (LH) 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
STEP 1. 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 power window main switch related DTC
is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the power window main switch. Refer to
Diagnostic trouble code chart
.
NO : Go to Step 2.
STEP 2. Check the power window main switch.
Check that the passenger's or rear power window works by
means of the power window main switch.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to inspection procedure 1 "Power windows do
not work at all
."
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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STEP 3. Check power window main switch connector E-15,
front power window motor (LH) connector E-14 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are power window main switch connector E-15, front
power window motor (LH) connector E-14 in good
condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the power window works
normally.
STEP 4. Check the wiring harness between power window
main switch connector E-15 (terminals Nos. 2 and 6) and
front power window motor (LH) connector E-14 (terminals
Nos. 4 and 1).
Q: Is the wiring harness between power window main
switch connector E-15 (terminals Nos. 2 and 6) and front
power window motor (LH) connector E-14 (terminals
Nos. 4 and 1) in good condition?
YES : Go to Step 5.
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. Check that
the power works normally.
STEP 5. Retest the system.
Check that the driver's power window works 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 the front power window motor (LH). Check
that the power works normally.
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INSPECTION PROCEDURE 3: Relevant Power Window(s) does not work by means of The Front and
Rear Passenger's Power Window Sub Switches.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
AC609758
ETACS-ECU
POWER
WINDOW
RELAY
AC
Power window (Front Passenger's side) Circuit
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
RED
RED
RED
GREEN
BR
O
W
N
GREEN
BR
O
W
N
B
R
O
WN
GREEN
FRONT
(RH)
LOCK
SWITCH
POWER
WINDOW
MAIN SWITCH
VIOLET
BLUE
FRONT
POWER
WINDOW
SUB
SWITCH
FRONT
POWER
WINDOW
MOTOR (RH)
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