Diagnostic Test

SPEED CONTROL SWITCH VOLTAGE LOW
1. Ignition on, engine not running.
2. With the scan tool in Sensors, read the S/C Switch Volts.
  Is the Speed Control voltage below 1.0 volt?
  
  Yes
  - Go To step 2
  No
  - Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
SPEED CONTROL SWITCH
1. With the scan tool in Sensors, monitor the S/C Switch Volts.
2. Disconnect the Speed Control Switch harness connector.
  Did the voltage change to above 4.7 volts?
  
  Yes
  - Replace the Speed Control Switch.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Go To step 3
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO (V937/K914) S/C SWITCH RETURN CIRCUIT

Fig 1: Checking S/C Switch Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM harness connector.
  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 PCM Pinout Box 8815 to perform diagnosis.
3. Measure the resistance between the (V937/K914) S/C Switch Return circuit and the (V71) S/C Switch No. 1 Signal circuit in the Speed Control Switch harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (V71) S/C Switch No. 1 Signal circuit for a short to the (V937/K914) S/C Switch Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Go To step 4
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND

Fig 2: Checking S/C Switch Circuit
Courtesy of CHRYSLER LLC

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 PCM Pinout Box 8815 to perform diagnosis.
1. Measure the resistance between the (V71) S/C Switch No. 1 Signal circuit at the appropriate terminal of special tool #8815 and ground.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (V71) S/C Switch No. 1 Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Go To step 5
PCM
NOTE: Before continuing, disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.

If there are no possible causes remaining, view repair.

Repair
- Replace and program the Powertrain Control Module in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure