2011 Chrysler 300 Base, GasFACTORY OEM SERVICE PROCEDURE

Diagnostic Test

  1. VERIFY THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, erase DTCs.
    3. With the scan tool, read DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  2.

      No 

      • Go To  6.
  2. (G304) FRONT AXLE LOCK CONTROL CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Checking Front Axle Disconnect (FAD) Module For Short To Voltage
    GC0096572Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the DTCM harness connector.
    3. Disconnect the FAD Module harness connector.
    4. Ignition on, engine not running.
    5. Measure the voltage between ground and the (G304) Front Axle Lock Control circuit.

      Is any there voltage present?

      Yes 

      • Repair the short to voltage in the (G304) Front Axle Lock Control circuit.
      • Refer to Standard Procedure  and perform the DTCM VERIFICATION TEST.

      No 

      • Go To  3.
  3. FRONT AXLE DISCONNECT (FAD) MODULE SHORTED TO VOLTAGE 
    Fig 2: Checking Front Axle Disconnect (FAD) Module For Short To Voltage
    GC0096572Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Connect the FAD Module harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage between ground and the (G304) Front Axle Lock Control circuit at the DTCM harness connector.

      Is any there voltage present?

      Yes 

      • Go To  5.

      No 

      • Go To  4.
  4. DRIVE TRAIN CONTROL MODULE (DTCM) 
    1. Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Refer to Standard Procedure  and perform the DTCM VERIFICATION TEST.

      No 

  5. FRONT AXLE DISCONNECT (FAD) MODULE 
    1. Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Refer to Standard Procedure  and perform the DTCM VERIFICATION TEST.

      No 

      • Replace the Front Axle Disconnect (FAD) Module in accordance with the Service Information.
      • Refer to Standard Procedure  and perform the DTCM VERIFICATION TEST.
  6. INTERMITTENT WIRING HARNESS AND CONNECTORS 
    1. The conditions necessary to set this DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring harness and connectors specific to this circuit.
    3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
    4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Refer to Standard Procedure  and perform the DTCM VERIFICATION TEST.

      No 

      • Test Complete.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.