Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs.
3. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2.
  No
  - Go To 6.
(G304) FRONT AXLE LOCK CONTROL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Front Axle Lock Control Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the FAD Module harness connector.
3. Disconnect the DTCM C1 harness connector.
4. Ignition on, engine not running.
5. Measure the voltage between ground and the (G304) Front Axle Lock Control circuit at the DTCM C1.
  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.
FRONT AXLE DISCONNECT (FAD) MODULE SHORTED TO VOLTAGE

Fig 2: Checking Front Axle Lock Control Circuit
Courtesy of CHRYSLER GROUP, 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 C1 harness connector.
  Is any there voltage present?
  
  Yes
  - Go To 5.
  No
  - Go To 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
  - Replace the Drive Train Control Module (DTCM) in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the DTCM VERIFICATION TEST.
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.
INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times (if equipped).
6. Look for the data to change other than as expected 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.