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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 P0581: Speed Control Switch #1 High >> Testing

DTC P0581: Speed Control Switch #1 High: 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.
WARNING: Vehicles are equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.
  1. Do not press any of the speed control switch buttons. Ignition on, engine not running. With the DRBIII® scan tool, read the speed control voltage. Is the speed control voltage above 4.8 volts? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Remove the speed control switches from the steering wheel. Measure the resistance across each speed control switch. Monitor the ohmmeter while pressing each function button on each switch. Resume/Accel (15,400 ohms), Cancel (900-918 ohms), Decel (Coast) (2910-2970 ohms), On/Off (0 ohm), Set (6584-6716 ohms). Does the function on the speed control switches have the correct ohm value? If yes, go to next step. If no, replace the speed control switch that had the incorrect resistance value.
  3. Disconnect the upper and lower 6-pin clockspring harness connectors. Measure the resistance of the (K4) sensor ground circuit between the upper and lower 6-pin clockspring harness connectors. Measure the resistance of the (V37) S/C switch signal circuit between the upper and lower 6-pin clockspring harness connectors. Was the resistance above 5.0 ohms for either circuit? If yes, replace the clockspring. If no, go to next step.
  4. Connect the clockspring harness connectors. Disconnect the speed control ON/OFF switch 2-pin harness connector only. Ignition on, engine not running. Measure the voltage on the (V37) S/C switch signal circuit in the ON/OFF switch 2-pin connector. Is the voltage above 5.2 volts? If yes, repair the short to voltage in the (V37) S/C switch signal circuit. If no, go to next step.
    5. 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.
  5. Turn the ignition off. Disconnect the upper and lower clockspring harness connectors. Disconnect the PCM harness connectors. Measure the resistance of the (V37) S/C switch signal circuit from the lower clockspring harness connector to 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 (V37) S/C switch signal circuit between the PCM and clockspring.
    6. 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.
  6. Measure the resistance of the (K4) sensor ground circuit from the lower clockspring harness connector to 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 (K4) sensor ground circuit between the PCM and clockspring.
  7. Measure the resistance of the (V37) S/C switch signal circuit from the upper clockspring harness connector to the ON/OFF switch harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (V37) S/C switch signal circuit, clockspring to S/C switch.
  8. Measure the resistance of the (K4) sensor ground circuit from the ON/OFF switch 2 pin harness connector to the upper clockspring harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K4) sensor ground circuit between the clockspring and S/C switch.
    9. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  9. 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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