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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (6.4L - DTCS P0522 To P1521) >> Diagnosis And Testing >> P0688-Auto Shutdown Relay Sense Circuit Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. ACTIVE DTC 
    NOTE:

    If any of the following component DTCs have set along with P0688, diagnose them first before continuing: Ignition Coil(s), Fuel Injector(s), ASD Control.

    1. Ignition on, engine not running.
    2. With the scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2.

      No 

      • Refer to STANDARD PROCEDURE and perform the INTERMITTENT CONDITION diagnostic procedure.
  2. (K51) ASD CONTROL CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Measure the resistance of the (K51) ASD Control circuit from the PDC harness connector to the appropriate terminal of PCM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  4.

      No 

      • Repair the open in the (K51) ASD Control circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  3. (F342) ASD CONTROL OUTPUT CIRCUIT(S) SHORTED TO GROUND 
    1. Measure the resistance between ground and each of the (F342) ASD Control Output circuits in the PDC harness.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (F342) ASD Control Output circuit(s).
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  5.
  4. (F342) ASD CONTROL OUTPUT CIRCUIT(S) OPEN 
    1. Turn the ignition off.
    2. Measure the resistance of each (F342) ASD Control Output circuits from the PDC harness to the appropriate terminals of PCM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  3.

      No 

      • Repair the open in the (F342) ASD Control Output circuit(s).
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  5. POWER DISTRIBUTION CENTER 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related PDC and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the PDC and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.

      No 

      • Replace and program the Power Distribution Center in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
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