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 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" are displayed for all the items

Q. Are 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-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?
Normal conditions are 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. 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 ).
  • Turn the ignition switch to the ON position.
  • Power window main switch: UP
Item No.
 Item name
 Normal condition
C0
 PASS DOR UP
 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 Cope with Intermittent Malfunction ).
Replace the power window main switch.