P0500

Diagnostic Chart:

Schematic:

The Vehicle Speed Sensor (VSS) produces an AC voltage of different amplitude and frequency depending on the velocity of the output shaft. The VSS produces the signal from 16 evenly spaced machined notches on the transaxle differential carrier. The vehicle speed sensor produces a readable AC voltage signal when vehicle speed is above 5 km/h (3 mph). This VSS signal is sent to the PCM, which is used to determine the velocity of the output shaft DTC P0500 sets when the PCM does not detect a VSS signal for a certain length of time.

DTC PARAMETERS
DTC P0500 will set if no VSS signal is detected when:
^ Condition exists for longer than 6.2 seconds
^ Condition exists twice in one ignition cycle
^ Engine speed is greater than 1500 RPM
^ MAP is greater than 23 kPa (0.5 volts)
^ Transaxle is not in P/N (A/T only)
^ DTC P0107 or P0108 is not set

DTC P0500 diagnostic runs continuously once the above conditions have been met.

DTC P0500 is a type A DTC

DIAGNOSTIC AIDS
To locate an intermittent problem, use Scan tool to monitor VEHICLE SPEED with vehicle raised and drive wheels moving greater than 5 km/h (3 mph). Wiggling wires while watching for dropout in VEHICLE SPEED may locate the area where an open anywhere in the circuit or short to voltage/short to ground in circuit 401 could lie.

Check connection and sensor for tightness.

If no VSS signal is received, the speedometer will be inoperative.

If the PCM does not receive a VSS signal, it will calculate a VSS signal value based on RPM and TP angle. The speedometer will still be inoperative, however.

VSS resistance: 800 - 1600 ohms

IMPORTANT: On automatic transaxles, DTC P0722 will also set.