INSPECTION PROCEDURE D-1: Power windows do not work at all.

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 on 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" 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 the ETACS-ECU is not possible

."
"NG" is displayed on the "P/W MODULE" menu.: Refer to Inspection Procedure A-4 "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 conditions
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. Confirm communication data by using the SWS monitor.

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 ).)

Turn the ignition switch to the ON position.

Power window main switch: UP

Item No.	Item name	Normal conditions
C0	PASS DOR UP	ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 4

.
NO: 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?

YES: Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).)
NO: Replace the power window main switch.