Mitsubishi Grandis. Manual — part 256

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-486

COMMENTS ON TROUBLE SYMPTOM

Input signal from the power window main switch is
used in order to check the power window main
switch and confirm how the system is communicating
with the ETACS-ECU. If the communication line is
defective, the power windows will not work normally.

POSSIBLE CAUSES

• Malfunction of the power window main switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

POWER
WINDOW RELAY

ETACS-ECU

DIAGNOSIS
CONNECTOR

POWER WINDOW
MAIN SWITCH

FUSIBLE
LINK

5

FRONT SIDE

J/B SIDE

CPU

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

Power Window Main Switch Input Circuit <RHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-487

DIAGNOSIS PROCEDURE

Step 1. ECU check on the SWS monitor

Check that the power supply and earth lines to the
power window main switch (power window module)
and the SWS communication lines are normal.

• Turn the ignition switch to the ON position.

ECUS TO BE CHECKED

• P/W MODULE

OK: "OK" is displayed on the "P/W
MODULE" menu.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Refer to Inspection Procedure A-5
"Communication with the power window
main switch (power window module) is not
possible

P.54C-77

."

Step 2. Function diagnosis by using the SWS
monitor
<Selected item> POWER WINDOW

• Turn the ignition switch to the ON position.

• Power window main switch: UP

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Replace the ETACS-ECU.

Item No. Item name

Normal conditions

Item 71

P/W ECU ACK INPUT CHECK (only

momentarily when
switch is operated)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-488

Inspection Procedure Q-10: When the sunroof switch is operated, the switch signals are not received.

CAUTION

Whenever the ECU is replaced, ensure that the
input signal circuit is normal.

SUNROOF MOTOR
ASSEMBLY

CPU

SUNROOF
SWITCH

ETACS-
ECU

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

Sunroof Switch Input Circuit <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-489

COMMENTS ON TROUBLE SYMPTOM

If the input signal from the sunroof switch is
abnormal, the sunroof input check response signal
will not be sent to the SWS communication line.

POSSIBLE CAUSES

• Malfunction of the sunroof assembly

• Malfunction of the sunroof switch

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ECU check on the SWS monitor

Check that the power supply and earth lines to the
sunroof-ECU and the SWS communication lines are
normal.

• Ignition switch: ON

ECUS TO BE CHECKED

• Sunroof-ECU

OK: "OK" is displayed on the "sunroof-ECU"
menu.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Refer to Inspection Procedure A-6
"Communication with the sunroof-ECU is
not possible"

P.54C-90

.

SUNROOF MOTOR
ASSEMBLY

CPU

SUNROOF
SWITCH

ETACS-
ECU

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

Sunroof Switch Input Circuit <RHD>