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DTC P0500: No Vehicle Speed Sensor Signal: Testing

  1. Turn ignition on, engine not running. With the DRBIII®, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, go to step  11.
  2. Turn the ignition off. Disconnect the Vehicle Speed Sensor harness connector. Turn ignition on, engine not running. Measure the voltage on the 5-Volt Supply circuit at the Vehicle Speed Sensor harness connector. Is the voltage between 4.5 and 5.2 volts? If yes, go to next step. If no, go to step  8.
  3. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the Vehicle Speed Sensor Signal circuit from the PCM harness connector to the Vehicle Speed Sensor harness connector. Is the resistance above 5.0 ohms? If yes, repair the open Vehicle Speed Sensor Signal circuit. If no, go to next step.
  4. Measure the resistance between ground and the Vehicle Speed Sensor Signal circuit at the PCM harness connector. Is the resistance below 100 ohms? If yes, repair the Vehicle Speed Sensor Signal circuit for a short to ground. If no, go to next step.
  5. Turn ignition on, engine not running. Measure the voltage on the Vehicle Speed Sensor Signal circuit at the PCM harness connector. Is the voltage above 5.3 volts? If yes, repair the short to voltage in the Vehicle Speed Sensor Signal circuit. If no, go to next step.
  6. Turn the ignition off. Reconnect the PCM harness connectors. Connect a jumper wire to the Vehicle Speed Signal circuit in the VSS connector. Ignition on, engine not running. Quickly and repeatedly tap the jumper wire to ground. With the DRBIII®, read the Vehicle Speed Signal display. Is the DRBIII® reading Vehicle Speed above 0 MPH? If yes, replace the Vehicle Speed Sensor. If no, go to next step.
  7. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
  8. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the 5-Volt Supply circuit from the Vehicle Speed Sensor harness connector to the PCM harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the 5-Volt Supply circuit.
  9. Measure the resistance between ground and the 5-Volt Supply circuit at the Vehicle Speed Sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the 5-Volt Supply circuit. If no, go to next step.
  10. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
    11. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  11. The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set. Review the DRBIII® Freeze Frame information. If possible, try to duplicate the conditions under which the DTC was set. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.
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