Mitsubishi Grandis. Manual — part 183

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-194

INSPECTION PROCEDURE F-2: Any of the sunroof switch positions is defective.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If any of the sunroof switch positions is defective, the
communication line between the sunroof switch and
the sunroof motor assembly (sunroof-ECU) may be
defective.

POSSIBLE CAUSES

• Malfunction of the sunroof switch

• Malfunction of the sunroof motor assembly

(sunroof-ECU)

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

SWS monitor data list.

Check the SWS communication signal, which are
related to the sunroof.

<Selected item> Front ECU

•P/W•S/R

• Ignition switch: ON

• Operate the sunroof switch.

OK: Normal condition is displayed.

Q: Is the check result normal?

Sunroof Switch Circuit

SUNROOF-ECU

SUNROOF
SWITCH

SUNROOF MOTOR
ASSEMBLY

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

Item No. Item name

Normal conditions

Item 72

S/R ECU ACK

INPUT CHECK (only
momentarily when
switch is operated)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-195

YES :

Replace the sunroof motor assembly.

NO :

Refer to inspection procedure Q-10 When
the sunroof switch is operated, the switch
signal are not received

P.54C-488

."

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-196

INSPECTION PROCEDURE F-3: Sunroof timer function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

Sunroof Timer Function <LHD>

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

CONTROL CIRCUIT

IGNITION
SWITCH (IG2)

SUNROOF MOTOR
ASEEMBLY

ETACS-ECU

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-197

COMMENTS ON TROUBLE SYMPTOM

If the sunroof timer function does not work, the input
circuit from the ignition switch (IG1) or the driver's
door switch, the communication lines between the
ETACS-ECU and the sunroof motor assembly
(sunroof-ECU), the sunroof motor assembly
(sunroof-ECU) or the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the driver’s door switch

• Malfunction of ETACS-ECU

• Malfunction of the sunroof motor assembly

(sunroof-ECU)

• Damaged harness wires and connectors

Sunroof Timer Function <RHD>

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

CONTROL CIRCUIT

IGNITION
SWITCH (IG2)

SUNROOF MOTOR
ASEEMBLY

ETACS-ECU