Mitsubishi Evolution X. Manual — part 518
SUNROOF
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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
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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)
(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
).
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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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)
(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 4.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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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)
(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
.
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.
.
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.
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
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