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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission Diagnosis - A-541E >> Diagnostic Tests >> DTC P0500: No. 1 Vehicle Speed Sensor (VSS) Fault >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Test drive vehicle and determine if speedometer is functioning properly. If speedometer is okay, go to next step. If speedometer is not functioning, go to NO. 1 VEHICLE SPEED SENSOR (VSS)  under COMPONENT TESTS.
  2. Access ECT ECU harness connectors. Disconnect appropriate ECT ECU connector. Using ohmmeter, check continuity between terminal SPD and ground. See WIRING DIAGRAMS . If continuity exists, check and repair circuit for short to ground. If continuity does not exist, go to next step.
  3. Turn ignition on. Using DVOM, measure voltage between terminal SPD and ground. If voltage is not 9-14 volts, check and repair open circuit between combination meter and ECT ECU. See WIRING DIAGRAMS . If voltage is as specified, replace ECT ECU and retest.
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