Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

SCAN TOOL SHOWS SPEED CONTROL SWITCH ON/OFF
1. Turn the ignition on.
2. With the scan tool in Inputs/Outputs, read the Speed Control inputs state in PCM.
3. While monitoring the scan tool, push the Speed Control On/Off Switch several times, then leave it on.
  Did the scan tool show Speed Control Switch off and on?
  
  Yes
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
  No
  - Go To 2.
VISUALLY INSPECT THE S/C WIRING HARNESS
1. Turn the ignition off.
2. Using the Schematics as a guide, inspect the wiring and connectors.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CLOCKSPRING

Fig 1: Measuring Resistance Of S/C Switch Return Circuit Between Upper And Lower Clockspring Harness Connectors
Courtesy of CHRYSLER LLC
1. Disconnect the C1 and C3 Clockspring harness connectors.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance of the (V937) S/C Switch Return circuit between the Clockspring C1 and C3 harness connectors.
  
  Fig 2: Measuring Resistance Of S/C Switch Signal Circuit Between Upper And Lower Clockspring Harness Connectors
  Courtesy of CHRYSLER LLC
3. Measure the resistance of the (V37) S/C Switch 1 Signal circuit between the C1 and C3 harness connectors.
  Was the resistance above 5.0 Ohms for either circuit?
  
  Yes
  - Replace the Clockspring in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE SPEED CONTROL ON/OFF SWITCH
1. Disconnect the Speed Control On/Off Switch 2-way harness connector only.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance across the S/C On/Off Switch.
  Is the resistance between 20.3K and 20.7K Ohms?
  
  Yes
  - Go To 5.
  No
  - Replace the On/Off Switch in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (V37) S/C SWITCH 1 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 3: Speed Control Switch Connector Pin ID
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage of the (V37) S/C Switch 1 Signal circuit at the On/Off Switch connector.
  Is the voltage above 6.0 Volts?
  
  Yes
  - Repair the (V37) Switch 1 Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 6.
CHECK THE (V37) S/C SWITCH 1 SIGNAL CIRCUIT FOR AN OPEN BETWEEN THE PCM AND CLOCKSPRING
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance of the (V37) S/C Switch 1 Signal circuit between the PCM C2 harness connector and the Clockspring C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the open in the (V37) S/C Switch 1 Signal circuit between the PCM and Clockspring.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (V37) S/C SWITCH 1 SIGNAL CIRCUIT FOR AN OPEN BETWEEN THE CLOCKSPRING AND S/C SWITCH

Fig 4: Checking S/C Switch 1 Signal Circuit For Open Between Clockspring & S/C Switch
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (V37) S/C Switch 1 Signal circuit from the Clockspring C3 harness connector to the S/C switch harness connectors.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 8.
  No
  - Repair the open in the (V37) S/C Switch 1 Signal circuit between the Clockspring and S/C Switches.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (V937) S/C SWITCH RETURN CIRCUIT FOR AN OPEN BETWEEN THE CLOCKSPRING AND S/C SWITCH

Fig 5: Checking S/C Switch Return Circuit Open Clockspring To S/C Switch
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (V937) S/C Switch Return circuit between the S/C Switch harness connectors to the Clockspring C3 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 9.
  No
  - Repair the open in the (V937) S/C Switch Return circuit between the Clockspring and the S/C Switches.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (V937) S/C SWITCH RETURN CIRCUIT FOR AN OPEN BETWEEN THE PCM AND CLOCKSPRING
1. Measure the resistance of the (V937) S/C Switch Return circuit between the PCM harness connector and the Clockspring C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to PCM/ECM / TCM PROGRAMMING .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the open in the (V937) S/C Switch Return circuit from between the PCM and Clockspring.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .