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Home >> Toyota >> 1996 >> Avalon XLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P0500 - Vehicle Speed Sensor Malfunction >> Diagnosis & Repair

Diagnosis & Repair

  1. Test drive vehicle and check operation of speedometer. If speedometer is not functioning correctly, see the INSTRUMENT PANELS article. If speedometer is functioning correctly, go to next step.
  2. Access ECM behind glove box. Ensure ignition is off. Disconnect ECM E5 connector. See Figure. Using ohmmeter, check continuity between ground and terminal No. 12 (Violet/Yellow wire) at ECM E5 connector. If continuity exists, inspect and repair short in circuit. If continuity does not exist, go to next step.
  3. Turn ignition on. Using DVOM, measure voltage between ground and terminal No. 12 (Violet/Yellow wire) at ECM E5 connector. If voltage is 9-14 volts, go to next step. If voltage is not 9-14 volts, inspect for open in circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary.
  4. Check for an open circuit between instrument cluster and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. If wiring is okay, replace ECM and retest.
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