Mitsubishi Evolution X. Manual - part 489

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DIAGNOSTIC TROUBLE CODE PROCEDURES <POWER WINDOW>

CODE NO. L0730 P/W (DR) SW pulse 1 disconnection

CAUTION

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

.

COMMENTS ON TROUBLE SYMPTOM

If the pulse 1 signal from the front power window 
motor (LH) cannot be received, the power window 
main switch sets the diagnosis trouble code No. 
L0730.

.

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 (terminals Nos. 8, 9 and 12) 
and front power window motor (LH) connector E-14 
(terminals Nos. 3, 5 and 6). 
Q: Is the wiring harness between power window main 

switch connector E-15 (terminals Nos. 8, 9 and 12) and 
front power window motor (LH) connector E-14 
(terminals Nos. 3, 5 and 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) Operate the driver’s door window switch on the power 

window main switch.

(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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CODE NO. L0732 P/W (DR) SW pulse 2 disconnection

CAUTION

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

.

COMMENTS ON TROUBLE SYMPTOM

If the pulse 2 signal from the front power window 
motor (LH) cannot be received, the power window 
main switch sets the diagnosis trouble code No. 
L0732.

.

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 (terminals Nos. 9, 11 and 12) 
and front power window motor (LH) connector E-14 
(terminals Nos. 5, 2 and 6).
Q: Is the wiring harness between power window main 

switch connector E-15 (terminals Nos. 9, 11 and 12) and 
front power window motor (LH) connector E-14 
(terminals Nos. 5, 2 and 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) Operate the driver’s door window switch on the power 

window main switch.

(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.