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Test No. 37: Stoplight 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 stoplight switch using DATA LIST. If stoplight switch is faulty, go to next step. If stoplight switch is okay, go to step  3.
  2. Check stoplight switch. See STOPLIGHT SWITCH  under COMPONENT TESTS. Replace stoplight switch as necessary. Retest system operation. If stoplight switch is okay, go to next step.
  3. Check circuits for faults between stoplight switch, body control ECU No. 2 and battery. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, perform TEST NO. 39: TRANSMISSION PATTERN SELECT SWITCH CIRCUIT .
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