LEMON Manuals: Even more car manuals for everyone
Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0501: Vehicle Speed Signal Performance >> Testing

DTC P0501: Vehicle Speed Signal Performance: 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.
  1. Ignition on, engine not running. Any VSS DTCs in the ABS module must be properly diagnosed before continuing. With the DRBIII® scan tool, read 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 PCM harness connectors. Disconnect the ABS module harness connectors. Ignition on, engine not running. Measure the voltage of the (G7) vehicle speed signal circuit at the ABS module harness connector. Is the voltage above 6.0 volts? If yes, repair the short to voltage in the (G7) vehicle speed signal circuit. If no, go to next step.
    3. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  3. Turn the ignition off. Measure the resistance of the (G7) vehicle speed signal circuit from the ABS module harness connector and the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (G7) vehicle speed signal circuit.
  4. Measure the resistance between ground and the (G7) vehicle speed signal circuit in the ABS module harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the (G7) vehicle speed signal circuit. 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 .
scientia non olet · About LEMON Manuals