Lexus IS250 IS220d GSE20 ALE20 - WINDSHIELD / WINDOWGLASS
POWER WINDOW CONTROL SYSTEM - DIAGNOSIS SYSTEM
| DESCRIPTION |
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.
| CHECK DLC3 |
The vehicle's ECM uses ISO 9141-2 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
- Standard:
Tester Connection Condition Specified Condition 7 (Bus + line) - 5 (Signal ground) During communication Pulse generation 4 (Chassis ground) - Body ground Always Below 1 Ω 5 (Signal ground) - Body ground Always Below 1 Ω 16 (B+) - Body ground Always 9 to 14 V
- HINT:
- If the screen displays a communication error message after you have connected the cable of the intelligent tester to the DLC3, turned the engine switch on (IG) and used the intelligent tester, the problem may be on the vehicle side or tester side.
| INSPECT BATTERY VOLTAGE |
Check the battery voltage.
- Standard voltage:
- 11 to 14 V
If the voltage is below 11 V, replace the battery before proceeding.
| CHECK DIAGNOSIS |
- HINT:
- If there is a malfunction in the pulse sensor, manually operating the power window switch will cause the power window switch light to blink. The light continues to blink for 43 seconds or until the engine switch is turned off. After 43 seconds, the power window switch light remains on.
Turn the engine switch on (IG).
Manually operate the power window master switch or power window switch at each door.
Check the blinking pattern of the AUTO light as shown in the illustration.
If pattern (A) is displayed, reset the power window regulator motor.
If pattern (B) or (C) is displayed, check the wire harness.
If the normal pattern is displayed, replace the multiplex network master switch.