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.

ECU TO BE CHECKED

• ETACS ECU

• P/W MODULE

OK: "OK" are displayed for all the items

Q: Is the check result normal?

"OK" are displayed for all the items:  Go to Step 2.
"NG" is displayed on the "ETACS ECU" menu.:  Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."
"NG" is displayed on the "P/W MODULE" menu.:  Refer to Inspection Procedure A-5 "Communication with 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
30	IG SW (IG1)	ON
33	P/W SW ACCEPT	PERMIT
71	P/W ECU ACK	INPUT CHECK (only momentarily when switch is operated)

OK: Normal conditions are displayed for all the items.

Q: Is the check result normal?

Normal conditions displayed for all the items:  Go to Step 3.
Normal condition is not displayed for item No.30:  Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."
Normal condition is not displayed for item No.33:  Replace the ETACS-ECU.
Normal condition is not displayed for item No.71:  Replace the power window main switch.

Step 3. Retest the system.

Check that the all the power windows work.

Q: Is the check result normal?

YES:  Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction )).
NO:  Replace the power window main switch.