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Home >> Toyota >> 2001 >> Avalon XLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Diagnostic Tests >> DTC P0500: Vehicle Speed Sensor Circuit >> Diagnosis & Repair

Diagnosis & Repair

  1. Test drive vehicle and check operation of speedometer. If speedometer is operating correctly, go to next step. If speedometer is not operating correctly, repair speedometer as necessary. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
  2. Access ECM behind passenger-side kick panel. See Figure. Ensure ignition is off. Disconnect ECM harness connector E7. Check continuity between ground and terminal No. 22 (Violet/White wire) at ECM harness connector E7. See Figure. If continuity does not exist, go to next step. If continuity exists, locate and repair short to ground in Violet/White wire between instrument cluster and ECM.
  3. Turn ignition on. Measure voltage between ground and terminal No. 22 (Violet/White wire) at ECM harness connector E7. If voltage is 9-14 volts, replace ECM. If voltage is not 9-14 volts, repair open in Violet/White wire between instrument cluster and ECM. See WIRING DIAGRAMS article.
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