DTC P0500: VEHICLE SPEED SENSOR FAULT
CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat
testing to confirm ECM malfunction.
Vehicle Speed Sensor (VSS), driven by speedometer cable, outputs a signal from instrument cluster to ECM. Instrument cluster converts signal to a more precise waveform for ECM. Code is set when ECM does not
detect any signal while vehicle is in motion. Possible causes are:
? Instrument cluster.
? Speed sensor open or short circuit.
? Speedometer cable.
Diagnosis & Repair
1. Test drive vehicle and check operation of speedometer. If speedometer is not functioning correctly, see INSTRUMENT PANEL article under ACCESSORIES/SAFETY EQUIPMENT section. If speedometer
is functioning correctly, go to next step.
2. Access ECM behind glove box. Ensure ignition is off. Disconnect cruise control ECU Green connector. Cruise control ECU is behind right kick panel. Ensure shift lever is in Neutral. Lift and support rear of
vehicle. Turn ignition on.
Do not under any circumstances replace the ecm as this could be a false indicator like a speedo cable bad unlessyou have the electronic trans. If yo have the speedo cable make sure to see if it is broken. If you cannot find the fault take to a pro as it may be a poor connection at ecm.
Thursday, August 2nd, 2012 AT 1:40 PM