LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (Engine Controls - DTCS P0585 To P0688) >> Diagnosis And Testing >> P0645-A/C Clutch Relay Circuit >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  A/C CLUTCH RELAY OPERATION 

    Ignition on, engine not running.

    With a scan tool, actuate the A/C Clutch Relay.

    Is the A/C Clutch Relay operating? 

    Yes 

    1. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go To  2).
  2. 2)  A/C CLUTCH RELAY RESISTANCE 

    Turn the ignition off.

    Remove the A/C Clutch Relay from the IPM.

    Measure the resistance of the A/C Clutch Relay Coil.

    Is the resistance between 60 to 80 ohms? 

    Yes 

    1. Go To  3).

    No 

    1. Replace the A/C Clutch Relay.
    2. Perform POWERTRAIN VERIFICATION TEST .
  3. 3)  INTERNAL FUSED B+ CIRCUIT 

    Ignition on, engine not running.

    Using a 12-volt test light connected to ground, probe the Internal Fused B+ circuit in the connection.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the open or short to ground in the Internal Fused B+ circuit. Check and replace any open fuses.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4)  (C13) A/C CLUTCH RELAY CONTROL CIRCUIT OPEN 

    Turn the ignition off.

    Disconnect the PCM harness connectors.

    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 Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (C13) A/C Clutch Relay Control circuit from the relay connection to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the open in the (C13) A/C Clutch Relay Control circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5)  (C13) A/C CLUTCH RELAY CONTROL CIRCUIT SHORTED TO GROUND 

    Measure the resistance between ground and the (C13) A/C Clutch Relay Control circuit at the IPM.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the short to ground in the (C13) A/C Relay Clutch Control circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go To  6).
  6. 6)  PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace and program the Powertrain Control Module per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
scientia non olet · About LEMON Manuals