INSPECTION PROCEDURE C-1: Power Windows do not work at All. <Using SWS Monitor>

caution

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

COMMENTS ON TROUBLE SYMPTOM

If the power windows do not work at all, the power window relay, the power window main switch or the ETACS-ECU may be defective.

POSSIBLE CAUSES

Malfunction of the power window relay
Malfunction of the power window main switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. ECU check by using the SWS monitor

Check that the power supply and earth lines to the ETACS-ECU and 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

ETACS ECU
P/W MODULE

OK: "OK" is displayed for all the items

Q. Are the check result normal?

YES <"OK" is displayed for all the items>

: Go to Step 2.

NO <"NG" is displayed on the "ETACS ECU" menu.> : Refer to GROUP 54C, Inspection Procedure 2 "Communication with the ETACS-ECU is not possible

."

NO <"NG" is displayed on the "P/W MODULE" menu.> : Refer to GROUP 54C, Inspection Procedure 5 "Communication with the power window main switch (power window module) is not possible

STEP 2. Function diagnosis by using the SWS monitor

Check the SWS communication signal, which are related to the power windows.
Selected item POWER WINDOW

Turn the ignition switch to the ON position.
Power window main switch: UP

Item No.	Item name	Normal condition
Item 30	IG SW (IG1)	ON
Item 33	P/W SW ACCEPT	PERMIT
Item 71	P/W ECU ACK	INPUT CHECK (only momentarily when switch is operated)

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 3.

NO <Normal condition is not displayed for item No.30> : Refer to GROUP 54A, inspection procedure C-2 "The ignition switch (IG1) signal is not received

."

NO <Normal condition is not displayed for item No.33> : Replace the ETACS-ECU.

NO <Normal condition is not displayed for item No.71> : Replace the power window main switch.

STEP 3. SWS monitor data list

Check the SWS communication signal, which are related to the power windows.
Selected item DOOR CNT. COM.

Insert the probe (For the insertion point, refer to GROUP 54C, How to connect SWS monitor ).
Turn the ignition switch to the ON position.
Power window main switch: UP

Item No.	Item name	Normal condition
Item C0	Pass door UP SW	ON

OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 4.

Replace the power window main switch.

STEP 4. Retest the system.

Check that the all the power windows work.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Replace the power window main switch.