DP1 - DTC 0500: Check Continuity of VSS Harness Circuits

Diagnostic Trouble Code (DTC) 0500 indicates the VSS input signal has been detected out of Self-Test range.

Possible Causes:
- Open in VSS(+)/VSS(-) harness circuit.
- Short to GND or SIG RTN in VSS(+)/VSS(-) harness circuit.
- Short to PWR in VSS(+)/VSS(-) harness circuit.
- Damaged VSS.
- Damaged PCM.

- Key Off.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, PCM disconnected.

- Disconnect VSS.

- Measure resistance between Test Pin 58 [VSS(+)] at the breakout box and VSS (+) circuit at the VSS vehicle harness connector.

- Measure resistance between Test Pin 33 [VSS(-)] at the breakout box and VSS(-) circuit at the VSS vehicle harness connector.

- Is each resistance less than 5.0 ohms?

YES -- Go to DP2. DP2 - Check VSS Harness Circuits For Shorts

NO -- SERVICE open in harness circuit. REMOVE breakout box. RECONNECT all components. COMPLETE PCM reset to clear DTCs. RUN VSS Drive Cycle in DP20 to verify repair. DP20 - VSS Drive Cycle Test