INSPECTION PROCEDURE B-1: Power Windows do not work at All. <Using SWS Monitor>


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




COMMENTS ON TROUBLE SYMPTOM



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




  • Turn the ignition switch to the ON position.
ECUS TO BE CHECKED
  • ETACS ECU
  • P/W MODULE
OK: "OK" is displayed for all the items

Q. Are the check result normal?







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 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?









STEP 3. SWS monitor data list



Selected item DOOR CNT. COM.
  • Insert the probe (For the insertion point, refer to GROUP 54C, How to connect SWS monitor ).
  • Turn the ignition switch to the ON position.
  • Power window main switch: UP
Item No.
 Item name
 Normal condition
Item C0
 Pass door UP SW
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?





STEP 4. Retest the system.



Q. Is the check result normal?