Diagnostic Test

ACTIVE DTC
1. 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 may result in possible serious or fatal injury.
  
  NOTE: It may be necessary to test drive the vehicle and operate the speed control in order for this Diagnostic Trouble Code (DTC) to set.
2. With the scan tool, select View DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go to step 2
  No
  - Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
SPEED CONTROL SWITCHES
1. Disconnect and remove the Speed Control Switches from the steering wheel.
2. Measure the resistance across each Speed Control Switch.
3. Monitor the ohmmeter while pressing each function button on each switch.
4. The following resistance specs are taken between terminals (V38) S/C Switch No. 2 Signal and (V937) S/C Switch Return circuits of the Switch when holding the switch button in the following position.
5. Not pressing any switch - 20.5k Ohms
6. On/Off - 8.87k Ohms
7. Set - 0.825k Ohms
8. Coast - 0.47k Ohms
9. Cancel - 3.92k Ohms
10. Resume/Accel - 1.87k Ohms
  Does the function on the Speed Control Switches have the correct resistance value?
  
  Yes
  - Go to step 3
  No
  - Replace the Speed Control Switch that had the incorrect resistance value.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
CLOCKSPRING

Fig 1: Measuring Resistance Of S/C Switch Signal Circuit Between Clockspring Harness Connectors
Courtesy of CHRYSLER LLC

Fig 2: Measuring Resistance Of S/C Switch Return Circuit Between Clockspring Harness Connectors
Courtesy of CHRYSLER LLC
1. Disconnect the C1 and C3 Clockspring harness connectors per Service Information.
2. Measure the resistance of the (V937) S/C Switch Return circuit between the upper and lower clockspring harness connectors.
3. Measure the resistance of the (V38) S/C Switch No. 2 Signal circuit between the C1 and C3 Clockspring harness connectors.
  Was the resistance greater than 5 Ohms for either circuit?
  
  Yes
  - Replace the clockspring.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
(V38) SIGNAL NO. 2 CIRCUIT SHORTED TO VOLTAGE

Fig 3: Checking S/C Switch Signal Circuit Shorted To Voltage
Courtesy of CHRYSLER LLC
1. Connect the C1 and C3 Clockspring harness connectors per Service Information.
2. Disconnect the C3 PCM harness connector.
3. Ignition on, engine not running.
4. Measure the voltage on the (V38) S/C Signal No. 2 circuit in the Speed Control harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (V38) S/C Signal No. 2 circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 5
(V38) S/C SWITCH NO. 2 SIGNAL CIRCUIT OPEN

Fig 4: Measuring Resistance Of S/C Switch Signal Circuit From Both Speed Control Harness Connectors To Appropriate Terminal Of Special Tool #8815
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
  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.
2. Measure the resistance of the (V38) S/C Switch No. 2 Signal circuit from the both Switch harness connectors to the appropriate terminal of special tool #8815.
  Is the resistance less than 5.0 Ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the open in the (V38) S/C Switch No. 2 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(V937) S/C SWITCH RETURN CIRCUIT OPEN

Fig 5: Measuring Resistance Of S/C Switch Return Circuit From Speed Control Harness Connector To Appropriate Terminal Of Special Tool #8815
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (V937) S/C Switch Return circuit from the both Switch harness connectors to the appropriate terminal of special tool #8815.
  Is the resistance less than 5.0 Ohms?
  
  Yes
  - Go to step 7
  No
  - Repair the open in the (V937) S/C Switch Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control Switch and the PCM.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify there is good pin to terminal contact in the Switch and PCM connectors.
4. Refer to any Technical Service Bulletins (TSBs) that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Replace and program the PCM in accordance with Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .