Mitsubishi Evolution X. Manual - part 490

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42A-63

CODE NO. L0734 P/W (DR) Above window position

CAUTION

Before replacing the ECU, ensure that the input 
and output signal circuits are normal.

.

COMMENTS ON TROUBLE SYMPTOM

If the driver's door window glass exceeds the fully 
closed position, power window main switch sets the 
diagnostic trouble code No. L0734.

.

PROBABLE CAUSES

• Malfunction of the front power window motor (LH)

• Malfunction of the power window main switch

DIAGNOSTIC PROCEDURE

STEP 1. Check the power window fully closed position
(1) Carry out the learning procedures of the power window fully 

closed position. Refer to 

P.42A-117

.

(2) Recheck if the diagnostic trouble code is set.

a. Erase the diagnostic trouble code.
b. Press the driver’s door window switch (on the power 

window main switch) down to open the window, and pull 
up the driver’s door window switch to fully close the 
window.

c. Check if the diagnostic trouble code is set.

Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 2.

STEP 2. Diagnostic trouble code recheck
Replace the front power window motor (LH). Recheck if the 
diagnostic trouble code is set.
(1) Erase the diagnostic trouble code.
(2) Press the driver’s door window switch (on the power 

window main switch) down to open the window, and pull up 
the driver’s door window switch to fully close the window.

(3) Check if the diagnostic trouble code is set.
Q: Is the diagnostic trouble code set?

YES : Replace the power window main switch.
NO :  The procedure is complete. Verify that the power 

window works normally.

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42A-64

CODE NO. L0736 P/W (DR) Sensor fail (ground)

CAUTION

Before replacing the ECU, ensure that the input 
and output signal circuits are normal.

.

COMMENTS ON TROUBLE SYMPTOM

If the ground fault of the front power window motor 
(LH) sensor power supply is detected, power window 
main switch sets the diagnosis trouble code No. 
L0736

.

PROBABLE CAUSES

• Malfunction of the front power window motor (LH)

• Malfunction of the power window main switch

• Damaged wiring harness and connectors

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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DIAGNOSTIC PROCEDURE

STEP 1. 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 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the power window works 

normally.

STEP 2. Check the wiring harness between power window 
main switch connector E-15 (terminal No. 12) and front 
power window motor (LH) connector E-14 (terminal No. 6). 
Q: Is the wiring harness between power window main 

switch connector E-15 (terminal No. 12) and front power 
window motor (LH) connector E-14 (terminal No. 6) in 
good condition?
YES : Go to Step 3.
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 power window works normally.

STEP 3. Diagnostic trouble code recheck
Replace the front power window motor (LH). Recheck if the 
diagnostic trouble code is set.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the 

ON position.

(3) Check if the diagnostic trouble code is set.
Q: Is the diagnostic trouble code set?

YES : Replace the power window main switch.
NO :  The procedure is complete. Verify that the power 

window works normally.

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42A-66

CODE NO. L0740 P/W (DR) 3 times jam - protection

CAUTION

Before replacing the ECU, ensure that the input 
and output signal circuits are normal.

.

COMMENTS ON TROUBLE SYMPTOM

If the anti-trap function is activated consecutively 
three times or more, power window main switch sets 
the diagnostic trouble code No. L0740.

.

PROBABLE CAUSES

• Malfunction of the front power window motor (LH)

• Malfunction of the power window main switch

DIAGNOSTIC PROCEDURE

STEP 1. Check the power window fully closed position
(1) Carry out the learning procedures of the power window fully 

closed position. Refer to 

P.42A-117

.

(2) Recheck if the diagnostic trouble code is set.

a. Erase the diagnostic trouble code.
b. Turn the ignition switch from the LOCK (OFF) position to 

the ON position.

c. Check if the diagnostic trouble code is set.

Q: Is the check result normal?

YES : The procedure is complete.
NO :  Go to Step 2.

STEP 2. Diagnostic trouble code recheck
Replace the front power window motor (LH). Recheck if the 
diagnostic trouble code is set.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the 

ON position.

(3) Check if the diagnostic trouble code is set.
Q: Is the diagnostic trouble code set?

YES : Replace the power window main switch.
NO :  The procedure is complete. Verify that the power 

window works normally.