INSPECTION PROCEDURE C-5: The Power Window Timer Function does not work Normally. <Using SWS Monitor>

caution

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

OPERATION

The ETACS-ECU operates this function in accordance with the input signals below.

Ignition switch (IG1)
Driver’s door switch

COMMENTS ON TROUBLE SYMPTOM

If the power window timer function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.

POSSIBLE CAUSES

Malfunction of the driver’s door switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

DIAGNOSTIC 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 from the ON to the OFF position.

ECUS TO BE CHECKED

ETACS ECU
P/W MODULE

OK: "OK" are displayed for all the items

note

"OK" is displayed for the power window switch (power window module) for approximately one minute, and then changed to "NG". However, only "OK" is displayed for the ETACS-ECU.

Q. Are the check result normal?

YES ("OK" are 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 GROUP54C, 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 window timer function.
Selected item POWER WINDOW

Turn the ignition switch from the ON to the OFF position.

Item No.	Item name	Normal conditions
Item 30	IG SW IG1	OFF
Item 33	P/W SW ACCEPT	PERMIT
Item 71	P/W ECU ACK	NORMAL ACK

note

For item No.33 "P/W SW ACCEPT", "PERMIT" is displayed for approximately 30 seconds after the ignition switch is turned off, and then change to "PROHIBIT". In addition, on item No.71 "P/W MODULE", "NORMAL ACK" is changed to "INPUT CHECK" momentarily, when the power window main switch is operated for approximately 30 seconds after the ignition switch is turned off.

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 window timer function.
Selected item ETACS ECU

Driver’s door: open

Item No.	Item name	Normal condition
Item 32	DR DOOR SW	ON

OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 4.

Refer to GROUP 54A, Inspection Procedure C-5 "The driver’s door switch signal is not received <LH drive vehicles>

or <RH drive vehicles>

STEP 4. Retest the system.

Check that the power window timer function works normally.

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.