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Home >> Dodge and Ram >> 2018 >> Durango Pursuit >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (3.6L - DTCS P057F To P105C) >> DTC Troubleshooting >> P0645-A/C Control Circuit/Open >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, read DTCs and record on the repair order. Copy DTC and Freeze Frame information and erase DTCs.
      NOTE:

      Active or pending DTCs may not allow A/C Clutch actuation, make sure all DTCs are cleared before proceeding with this test procedure.

    3. With the scan tool, actuate the A/C Compressor Clutch.
    4. Monitor the scan tool for at least two minutes.
    5. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any ASD/Main Relay or system voltage DTCs active or pending?

      Yes 

      • Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .

      No 

      • Go To  3
  3. CHECK THE (C13) A/C COMPRESSOR CONTROL CIRCUIT FOR A SHORT TO ANOTHER VOLTAGE SOURCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Disconnect the PDC C3 harness connector.
      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 the GPEC Diagnostic Adaptor to perform the diagnosis.

    4. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    5. Check for continuity between the (C13) A/C Compressor Control circuit and all other 5.0 volt or 12.0 volt circuits at the GPEC Adaptor.

      Is there continuity between the (C13) A/C Compressor Control circuit and any other 5.0 volt or 12.0 volt circuit?

      Yes 

      • Repair the (C13) A/C Compressor Control circuit for a short to the circuit that showed continuity.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (C13) A/C CLUTCH RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (C13) A/C Clutch Relay Control circuit at the A/C Clutch Relay at the GPEC Adaptor?

      Is there continuity between ground and the (C13) A/C Clutch Relay Control circuit?

      Yes 

      • Repair the (C13) A/C Clutch Relay Control circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (C13) A/C CLUTCH CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (C13) A/C Clutch Control circuit between the PDC C3 harness connector and the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (C13) A/C Clutch Control circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK THE (C13) A/C CLUTCH CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE IN THE PDC 
    1. Reconnect the PDC C3 harness connector.
    2. Reconnect the PCM C1 harness connector with the GPEC Adaptor connected in-line.
    3. Turn the ignition on, engine not running.
    4. Measure the voltage on the (C13) A/C Clutch Control circuit at the GPEC Adaptor.
      NOTE:

      There should be Battery voltage present with the A/C Clutch Control circuit not being grounded by the PCM.

      Is Battery voltage present?

      Yes 

      • Go To  7

      No 

      • Check the fuses in the PDC. If a fuse is blown, replace it and retest the system. If all of the fuses are good, replace the Power Distribution Center in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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