Power Window Control System - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - WINDSHIELD / WINDOWGLASS


POWER WINDOW CONTROL SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use this procedure to troubleshoot the power window control system.
The intelligent tester should be used in steps 3 and 5.

1.VEHICLE BROUGHT TO WORKSHOP
NEXT
2.CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
NEXT
3.CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
  • HINT:

Use the intelligent tester to confirm normal function of the multiplex communication system.


(ECU unconnected, communication line malfunctioning) Without code outputs, proceed to A.

(ECU unconnected, communication line malfunctioning) With code outputs, proceed to B.

B.
GO TO MULTIPLEX COMMUNICATION SYSTEM
A
4.PROBLEM SYMPTOMS TABLE
  • HINT:
NEXT
5.OVERALL ANALYSIS AND TROUBLESHOOTING

Data list/Active test

  • HINT:

Circuit inspection

Terminal of ECU

  • HINT:
NEXT
6.ADJUST, REPAIR OR REPLACE
NEXT
7.RESET POWER WINDOW MOTOR
  • HINT:
NEXT
END