Mitsubishi Evolution X. Manual - part 518

SUNROOF

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42A-175

INSPECTION PROCEDURE 6: The Sunroof Timer Function does not work.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the ground circuit and the com-
munication circuit are normal.

.

CIRCUIT OPERATION

• The sunroof timer function works according to the 

signals from the following switches:

• Ignition switch (IG1): OFF

• Front door switch (LH): OFF

• Front door switch (RH): OFF

• Vehicle condition

• Ignition switch: LOCK (OFF) position

• Front door (LH): Closed

• Front door (RH): Closed

• When the driver’s door or the passenger’s door 

are opened and closed while the sunroof timer 
function is on, the sunroof operative duration will 
be changed.

.

TECHNICAL DESCRIPTION (COMMENT)

Is the sunroof timer function does not work normally, 
the input circuits from the switches described in 
"CIRCUIT OPERATION", the sunroof motor assem-
bly, the ETACS-ECU or the LIN communication line 
may be defective.

.

TROUBLESHOOTING HINTS

• The front door switch may be defective

• The sunroof motor assembly 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. Check the power supply system.
With the ignition switch in the LOCK (OFF) position, check if 
the following function operates normally:

• Hazard warning light

• Central door locking system

Q: Is the check result normal?

YES : Go to Step 2.
NO :  Refer to GROUP 54A 

− Malfunction of ETACS-ECU 

power supply circuit 

P.54A-636

.

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STEP 2. Using scan tool MB991958, read CAN bus 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) 

P.42B-10

."

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Repair the CAN bus line (Refer to GROUP 54C, CAN 

bus diagnostics table 

P.54C-14

).

NO :  Go to Step 3.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

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42A-177

STEP 3. 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) 

P.42B-10

."

(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 

P.54B-5

.

NO :  Go to Step 4.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

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42A-178

STEP 4. Using scan tool MB991958, check data list.
Check the signals related to the sunroof timer function opera-
tion.

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 the 

Scan Tool (M.U.T.-III) 

P.42B-10

."

(2) Turn the ignition switch to the "ON" position.
(3) Check the data list of the ETACS.

• Turn the ignition switch to the LOCK (OFF) position.

• Close the driver's door.

• Close the passenger's door.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

OK: Normal conditions are displayed for all the 
items.

Q: Are the check result normal?

YES <Normal conditions are displayed for all the 
items.> : Go to Step 5.
NO <Normal condition is not displayed for item No. 
254.> : Refer to GROUP 54A 

− inspection procedure 2: the 

ignition switch (IG1) signal is not received 

P.54A-642

.

NO <Normal condition is not displayed for item No. 
256.> : Refer to GROUP 54A 

− inspection procedure 5: the 

front door switch (driver’s side) signal is not received. 

P.54A-656

.

NO <Normal condition is not displayed for item No. 
257.> : Refer to GROUP 54A 

− inspection procedure 6: the 

front door switch (passenger’s side) signal is not 
received. 

P.54A-654

.

STEP 5. Retest the system.
Check that the sunroof timer function works normally.
Q: Is the check result normal?

YES : No action is necessary and testing is complete.
NO :  Replace the ETACS-ECU. Check that the sunroof 

timer function works normally.

Item No.

Item name

Normal 
condition

254

IG voltage

Battery 
voltage 

256

Dr door ajar switch

Close

257

As door ajar switch

Close

AC608435

Data link connector

MB991827

MB991824

MB991910

AB