Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, Clear DTCs in the Engine Control Module (ECM).
3. With the scan tool, actuate the A/C Clutch Relay.
4. Monitor the scan tool for at least two minutes.
5. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Perform the CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.
(C13) A/C CLUTCH RELAY CONTROL CIRCUIT SHORTED TO GROUND

Fig 1: Checking A/C Clutch Relay Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A/C Clutch Relay connector.
3. Disconnect the Engine Control Module (ECM) harness connector.
4. Measure the resistance between ground and the (C13) A/C Clutch Relay Control circuit in the A/C Clutch Relay connector.
  Is the resistance below 1000 Ohms?
  
  Yes
  - Repair the (C13) A/C Clutch Relay Control circuit for a short to ground.
  - Perform the ECM Verification Test.
  No
  - Go To 3
(C13) A/C CLUTCH RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 2: Checking A/C Clutch Relay Control Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (C13) A/C Clutch Relay Control circuit between the A/C Clutch Relay connector and the Engine Control Module (ECM) harness connector.
  Is the resistance below 10.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (C13) A/C Clutch Relay Control circuit for an open circuit or high resistance.
  - Perform the ECM Verification Test.
A/C CLUTCH RELAY
1. Connect the Engine Control Module (ECM) connector.
2. Install a known good relay in place of the vehicle's A/C Clutch Relay.
3. Turn the ignition on.
4. With the scan tool, Clear DTCs.
5. With the scan tool, actuate the A/C Clutch Relay.
6. Monitor the scan tool for at least two minutes.
7. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 5
  No
  - Replace the A/C Clutch Relay in accordance with the Service Information.
  - Perform the ECM Verification Test.
ENGINE CONTROL MODULE (ECM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Clutch Relay and the Engine Control Module (ECM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Refer to any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ECM Verification Test.
  No
  - Replace the Engine Control Module (ECM) in accordance with the Service Information.
  - Perform the ECM Verification Test.