Data of the system can be read from the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use the intelligent tester to check for a malfunction and repair it.

Disconnect the M7 (L17) switch connector.

Lexus IS250 IS220d GSE20 ALE20 WINDSHIELD / WINDOWGLASS

Turn the engine switch on (IG).

Lexus IS250 IS220d GSE20 ALE20 WINDSHIELD / WINDOWGLASS

Check that the front passenger side power window and rear power windows operation are disabled when the window lock switch of the power window master switch is pressed.

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

The power window control system has the following functions:

Lexus IS250 IS220d GSE20 ALE20 WINDSHIELD / WINDOWGLASS

Lexus IS250 IS220d GSE20 ALE20 WINDSHIELD / WINDOWGLASS