Power Window Master Switch/Driver Door Lock Control Switch Circuit
NOTE:
If LEXUS scan tool is available, start test from step 1. If this scan tool is not available, start test from step 2.
- Using scan tool, check for DTC B1221. If DTC B1221 is retrieved, go to next step. If DTC B1221 is not retrieved, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
- Check power window master switch. See DOOR LOCK CONTROL SWITCH under COMPONENT TESTS. Replace switch as necessary. Retest system operation. If switch is okay, go to next step.
- Check circuits for faults between power window master switch and driver door ECU. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .