INSPECTION PROCEDURE P-8: When the power window main switch is operated, the switch signals are not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.


COMMENTS ON TROUBLE SYMPTOM
Input signal from the power window main switch is used in order to check the power window main switch and confirm how the system is communicating with the ETACS-ECU. If the communication line is defective, the power windows will not work normally.

POSSIBLE CAUSES

  • 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 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
  • P/W MODULE
OK: "OK" is displayed on the "P/W MODULE" menu.

Q. Is the check result normal?
Go to Step 2.
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
<Selected item> POWER WINDOW
  • Turn the ignition switch to the ON position.
  • Power window main switch: UP
Item No.
 Item name
 Normal conditions
Item 71
 P/W ECU ACK
 INPUT CHECK (only momentarily when switch is operated)
OK: Normal condition is displayed.

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 ETACS-ECU.