P0500

Diagnostic Chart:

Wiring Diagram - Vehicle Speed Sensor:

Vehicle speed values are provided by the vehicle speed sensor (VSS). The sensor is a permanent magnet variable reluctance sensor (VRS) mounted on the differential area of the transaxle housing. The PM generator produces a pulsing voltage whenever vehicle speed is above 5 km/h (3 mph). These pulses occur 16 times per each revolution of the differential housing and are translated to provide vehicle speed in miles per hour.

DTC PARAMETERS

DTC P0500 will set if there is no VSS signal when:

^ The engine speed is between 1400-4000 rpm. The MAP indication is less than 0.5 V (less than 23 kPa [3 psi]) for greater than five seconds.

^ Vehicle not in park/neutral (Automatic Transaxle).


NOTE: The VSS signal is continuously checked once the above conditions are met. If VSS signal is missing the speedometer will be inoperative.

DIAGNOSTIC AIDS

When attempting to diagnose an intermittent problem, use the Scan tool to review malfunction history diagnostic information. The supplemental data can be used to duplicate a problem.

Intermittents or opens suspected to be at the connector can be detected by using diagnostic service probe Voltage can be read on wires without disconnecting any connectors.

Check the tightness of the female terminal grip with a spare male terminal.

^ The speedometer will not work if the VSS subsystem has failed.

^ If VSS reading is accurate and speedometer is incorrect, diagnose the Instrument Cluster.

^ VSS resistance 800-1600 ohms.

^ If problem is intermittent wiggle wires while monitoring VSS signal on Scan tool and watch for signal to jump for loss of signal.

^ The PCM will calculate VSS based on rpm and TP sensor signal if DTC P0500 is set but the speedometer will remain inoperative.