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Driver Seat Belt Buckle 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.
  1. Using scan tool, check driver seat belt buckle switch using DATA LIST. If driver seat belt buckle switch is faulty, go to next step. If driver seat belt buckle switch is okay, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
  2. Check driver seat belt buckle switch. See WIRING DIAGRAMS . Replace driver seat belt buckle switch as necessary. Retest system operation. If driver seat belt buckle switch is okay, go to next step.
  3. Check circuits for faults between driver seat belt buckle switch, body control ECU and ground. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, go to next test listed in BODY NO. 2 CONTROL SYSTEM  table under TROUBLE SHOOTING .
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