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Diagnostic Test

  1. 1) DTC IS ACTIVE 
    NOTE: Refer to the following table when diagnosing speed control switch voltage DTCs.
    - Switch 1 Voltage (pin A27)  Switch 2 Voltage (pin A26) 
    On/Off - Min. 0.5882 3.5294
    On/Off - Max. 1.1373 3.9216
    Set - Min. 3.1569 1.1765
    Set - Max. 3.5686 1.5686
    Cancel - Min. 1.5882 2.8431
    Cancel - Max. 2.0000 3.2549
    Accel - Min. 3.8824 2.0392
    Accel - Max. 4.1765 2.4706

    Start the engine and allow it to idle for at least 60 seconds.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.
    NOTE: It may be necessary to test drive the vehicle and operate the speed control in order for this DTC to set.

    With a scan tool, select View DTCs.

    Is the status Active for this DTC? 

    Yes 

    1. Go to step  2).

    No 

    1. Refer to *CHECKING FOR AN INTERMITTENT DTC diagnostic procedure.
  2. 2) SPEED CONTROL SWITCH 

    Turn the ignition off.

    Remove the Speed Control Switch in accordance with the Service Information.

    Turn the ignition on.

    With a scan tool, read the (V71) S/C Signal 1 voltage.

    NOTE: The (V71) S/C Signal 1 voltage should be above 4.8 volts with the Speed Control Switch removed.

    Is the (V71) S/C Signal 1 voltage above 4.8 volts with the Speed Control Switch removed? 

    Yes 

    1. Replace the Speed Control Switch in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to step  3).
  3. 3) CLOCKSPRING 

    Turn the ignition off.

    Disconnect the Steering Control Module (SCM) C5 connector.

    Turn the ignition on.

    With a scan tool, read the (V71) S/C Signal 1 voltage.

    NOTE: The (V71) S/C Signal 1 voltage should be above 4.8 volts with the connector disconnected.

    Is the (V71) S/C Signal 1 voltage above 4.8 volts with the connector disconnected? 

    Yes 

    1. Replace the Clockspring in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to step  4).
  4. 4) STEERING CONTROL MODULE (SCM) 

    Turn the ignition off.

    Disconnect the C2 Steering Control Module (SCM) harness connector.

    Turn the ignition on.

    With a scan tool, read the (V71) S/C Signal 1 voltage.

    NOTE: The (V71) S/C Signal 1 voltage should be above 4.8 volts with the connector disconnected.

    Is the (V71) S/C Signal 1 voltage above 4.8 volts with the connector disconnected? 

    Yes 

    1. Replace the Steering Control Module (SCM) in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to step  5).
  5. 5) (V71) S/C SIGNAL 1 CIRCUIT SHORTED TO GROUND 
    Fig 1: Measuring Resistance Between Ground And S/C Signal 1 Circuit In SCM C2 Harness Connector
    GC0054212Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance between ground and the (V71) S/C Signal 1 circuit in the C2 Steering Control Module (SCM) harness connector.

    Is the resistance above 100 ohms? 

    Yes 

    1. Go to step  6).

    No 

    1. Repair the short to ground in the (V71) S/C Signal 1 circuit.
    2. Perform PCM VERIFICATION TEST .
  6. 6) (V71) S/C SIGNAL 1 CIRCUIT SHORTED TO THE (V937) S/C SWITCH GROUND CIRCUIT 
    Fig 2: Checking S/C Signal 1 Circuit For Short To S/C Switch Ground Circuit
    GC0054213Courtesy of CHRYSLER LLC

    Measure the resistance between the (V71) S/C Signal 1 circuit and the (V937) S/C Switch Ground circuit in the C2 Steering Control Module (SCM) harness connector.

    Is the resistance above 100 ohms? 

    Yes 

    1. Go to step  7).

    No 

    1. Repair the short between the (V71) S/C Signal 1 circuit and the (V937) S/C Switch Ground circuit.
    2. Perform PCM VERIFICATION TEST .
  7. 7) (V71) S/C SIGNAL 1 CIRCUIT HIGH RESISTANCE 
    Fig 3: Checking S/C Signal 1 Circuit For High Resistance
    GC0059417Courtesy of CHRYSLER LLC

    Measure the resistance of the (V71) S/C Signal 1 circuit between the C2 Steering Control Module (SCM) harness connector and the C3 Powertrain Control Module (PCM) harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to step  8).

    No 

    1. Repair the excessive resistance in the (V71) S/C Signal 1 circuit.
    2. Perform PCM VERIFICATION TEST .
  8. 8) (V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Checking S/C Switch Ground Circuit For Open Or High Resistance
    GC0059418Courtesy of CHRYSLER LLC

    Measure the resistance of the (V937) S/C Switch Ground circuit between the C2 Steering Control Module (SCM) harness connector and the C3 Powertrain Control Module (PCM) harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to step  9).

    No 

    1. Repair the open or high resistance in the (V937) S/C Switch Ground circuit.
    2. Perform PCM VERIFICATION TEST .
  9. 9) POWERTRAIN CONTROL MODULE (PCM) 

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control Switch and the Powertrain Control Module (PCM).

    Look for any chafed, pierced, pinched, or partially broken wires.

    Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Switch and Control Module connectors.

    Refer to any Technical Service Bulletins that may apply.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Replace the Powertrain Control Module (PCM) in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .
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