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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Engine Controls - Self-Diagnostics - 3.9L & 5.9L) >> Diagnostic Tests >> DTC P0500: No Vehicle Speed Signal >> Testing

DTC P0500: No Vehicle Speed Signal: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Diagnose any CAB and/or Transmission Control Module (TCM) DTCs before proceeding. See appropriate ANTI-LOCK article in BRAKES and/or appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
  1. Turn ignition on, with engine off. With the DRBIII(R) scan tool, read the DTCs and record the related freeze frame data. Is the Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the CAB module harness connector. Disconnect the PCM harness connectors. Turn ignition on, with engine off. Measure the voltage on the (G7) VSS signal circuit in the CAB or PCM harness connector. Is the voltage more 4.9 volts? If yes, repair the (G7) VSS signal circuit for a short to voltage between the CAB and PCM. If no, go to next step.
  3. Turn the ignition off. Measure the resistance of the (G7) VSS signal circuit between the PCM harness connector and the CAB harness connector. Is the resistance less than 5.0 ohms? If yes, repair open in (G7) VSS signal circuit. If no, go to next step.
  4. Measure the resistance between ground and the (G7) VSS signal circuit at the PCM harness connector. Is the resistance less than 100 ohms? If yes, repair the short to ground in the (G7) VSS signal. If no, go to next step.
    5. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  5. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING  .
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