Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE (C13) A/C COMPRESSOR CLUTCH CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Disconnect the A/C Clutch Relay in the PDC.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Measure the resistance of the (C13) A/C Compressor Clutch Control circuit between the PCM C2 and A/C Clutch Relay.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 2
  No
  - Repair the (C13) A/C Compressor Clutch Control circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE (C13) A/C COMPRESSOR CLUTCH CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the (C13) A/C Clutch Control circuit at the A/C Clutch Relay in the PDC.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (C13) A/C Clutch Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE PCM
1. Reconnect the PCM C2 harness connector.
2. Ignition on, engine not running.
3. Using a 12-Volt test light connected to battery positive, probe the (C13) A/C Clutch Control circuit at the A/C Clutch Relay while actuating the A/C Clutch circuit with the scan tool.
  NOTE:
  The test light must illuminate brightly.
4. Compare the brightness to that of a direct connection to the Battery.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the A/C Clutch Relay in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Replace the Powertrain Control Module (PCM) in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .