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Home >> Lexus >> 2000 >> LX 470 >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System/Vehicle Skid Control >> Troubleshooting >> Active TRAC Indicator Light >> Diagnostic Procedure

Diagnostic Procedure

  1. Turn ignition on. Observe if ACTIVE TRAC warning light is on. If ACTIVE TRAC warning light illuminates, go to step  3. If ACTIVE TRAC warning light does not illuminate, replace light bulb as necessary. Recheck warning light operation. If bulb is okay or if ACTIVE TRACK warning light still does not illuminate, go to next step.
  2. Turn ignition off. Remove IG1 No. 1 relay from underhood relay box. Check continuity between specified relay terminals. See Figure. See IG1 NO. 1 RELAY CONTINUITY  table. Replace relay. If relay is okay, go to next step.
  3. Inspect circuit between IG1 No. 1 relay and combination meter. See WIRING DIAGRAMS . Repair as necessary. If circuit okay, go to next step.
  4. Check circuit between ACTIVE TRAC warning light and combination meter. Repair as necessary or replace combination meter. See appropriate INSTRUMENT PANELS article. If circuit or combination meter is okay, go to next step.
  5. Check circuit between ACTIVE TRAC warning light and ABS/BA/TRAC/VSC ECU. Repair as necessary. If circuit is okay, replace ABS/BA/TRAC/VSC ECU.
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