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DTC P0500: No Vehicle Speed Sensor Signal (M/T): Testing

  1. Raise the drive wheels off the ground. Be sure to keep hands and feet clear of rotating wheels. Start the engine. With the DRBIII®, monitor the Vehicle Speed Sensor. Place the transmission in any forward gear. Allow the wheels to rotate. Does the DRBIII® display vehicle speed above zero MPH/KMH? If yes, go to next step. If no, go to step  3.
    2. 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.
  2. The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. Remove and inspect the pinion gear for VSS, ensure the gear is free from damage. 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.
  3. Turn the ignition off. Disconnect the Vehicle Speed Sensor harness connector. Turn the ignition on. Measure the voltage of the 8-Volt Supply circuit in the VSS harness connector. Is the voltage above 7.0 volts? If yes, go to next step. If no, repair the 8-Volt Supply circuit for an open.
  4. Turn the ignition on. Measure the voltage of the Vehicle Speed Sensor Signal circuit in the VSS harness connector. Is the voltage between 4.5 to 5.0 volts? If yes, go to next step. If no, go to step  6.
  5. Turn the ignition off. Measure the resistance of the Sensor ground circuit between the VSS harness connector and ground. Is the resistance below 5.0 ohms? If yes, remove and inspect the Pinion Gear for the VSS. Replace Pinion Gear as necessary. If okay, replace the Vehicle Speed Sensor. If no, repair the Sensor ground circuit for an open.
  6. Ensure the ignition is off. Disconnect the PCM C2 harness connector. Measure the resistance of the Vehicle Speed Sensor Signal circuit between the VSS in the VSS harness connector to ground. Is the resistance below 100 ohms? If yes, repair the Vehicle Speed Sensor Signal circuit for a short ground. If no, go to next step.
  7. Measure the resistance of the Vehicle Speed Sensor Signal circuit between the VSS harness connector and the PCM C2 harness connector. Is the resistance below 5 ohms? If yes, go to next step. If no, repair the Vehicle Speed Sensor Signal circuit for an open.
  8. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
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