Mitsubishi Evolution X. Manual - part 514

SUNROOF

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42A-159

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Sunroof does not work at All.

CAUTION

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

AC609432

CPU

INTERFACE
CIRCUIT

LIN DRIVE
CIRCUIT

INPUT CIRCUIT

INPUT CIRCUIT

DRIVE CIRCUIT

SUNROOF MOTOR

HALL SENSOR

FUSIBLE
LINK

34

SUNROOF

MOTOR

ASSEMBLY

ETACS-ECU

BLA

CK

WHITE

WHITE

GREEN

VIOLET

AC

Sunroof Motor Assembly Power Supply Circuit

SUNROOF

SWITCH

BLA

CK

YELLO

W

GREEN

BLUE

SUNROOF

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42A-160

.

CIRCUIT OPERATION

Malfunctions of the sunroof motor assembly power 
supply/ground system, sunroof motor assembly, or 
sunroof switch are suspected.

.

TROUBLESHOOTING HINTS

• The sunroof 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. 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 2.

AC708954 AG

Connectors: D-05, D-06

D-05 (B)

D-06 (GR)

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

SUNROOF

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42A-161

STEP 2. 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 sunroof motor assembly related DTC is 

set.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the sunroof motor assembly. Refer to 

Diagnostic trouble code chart 

P.42A-152

.

NO :  Go to Step 3.

STEP 3. Check sunroof switch connector D-05 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is sunroof switch connector D-05 in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Check that the sunroof works normally.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

SUNROOF

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42A-162

STEP 4. Sunroof switch check
(1) Remove the sunroof switch. Refer to 

P.42A-187

.

(2) Check continuity when the sunroof switch is operated to 

"OPEN", "TILT-UP" or "CLOSE/TILT-DOWN" position.

Q: Is the sunroof switch normal?

YES : Go to Step 5.
NO :  Replace the sunroof switch. Check that the sunroof 

works normally.

STEP 5. Check the ground circuit to the sunroof motor 
assembly. Measure the resistance at sunroof switch 
connector D-05.
(1) Disconnect sunroof switch connector D-05 and measure the 

resistance available at the wiring harness side of the 
connector.

(2) Measure the resistance value between terminal 4 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 8.

STEP 6. Check sunroof motor assembly connector D-06 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is sunroof motor assembly connector D-06 in good 

condition?
YES : Go to Step 7.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Check that the sunroof works normally.

Switch 
position

Terminal No.

Normal value

Tilt-up

3 

− 4

Continuity 
exists (2 

Ω or 

less)

OFF

3 

− 4, 4 − 5, 4 − 6 Open circuit

Open

4 

− 5

Continuity 
exists (2 

Ω or 

less)

Close/tilt-down

4 

− 6

Continuity 
exists (2 

Ω or 

less)

AC506531AC

Sunroof switch

AC209731

6

4

5

3 2 1

Connector D-05
(Harness side)

AC208731BX