Diagnostic Test

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

DTC ACTIVE
CAUTION:
Before removing the FDCM harness connector, clean the connector and locking cam area of dirt and debris. Failure to do so can result in the connector being jammed or damage to the locking cams on the harness connector or module. Do not force the assist arm when releasing or installing the harness connector.

NOTE:
If set along with this DTC, diagnostic any Locker/Differential Indicator Control Circuit DTC(s) first before continuing.
1. Turn the ignition on, engine not running
2. With the scan tool, read FDCM DTC(s).
  Is the DTC active at this time?
  
  Yes
  - Go To 2.
  No
  - Go To 11.
(T530) STABILIZER BAR DISENGAGE ILLUMINATION SENSE OPERATION

Fig 1: Checking Stabilizer Bar Disengage Illumination Sense Operation
Courtesy of CHRYSLER GROUP, LLC

NOTE:
Before continuing with the below diagnostic test, ensure the FDCM harness connector seal is installed correctly. Inspect the terminals on both harness connector and the module for damage. Failure to do so can result in misdiagnoses of the system.
1. Turn the ignition off.
2. Disconnect the Disconnecting Stabilizer Bar Switch harness connector.
3. Using a 12-volt test light connected to battery voltage, probe the (T530) Stabilizer Bar Disengage Illumination Sense circuit.
4. Turn the ignition on.
5. With the scan tool, actuate the Stabilizer Bar Disengage Illumination Sense circuit.
  Does the test light illuminate and flash on and off?
  
  Yes
  - Go to 3.
  No
  - Go To 4.
(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE OPERATION

Fig 2: Checking Stabilizer Bar Engage Illumination Sense Operation
Courtesy of CHRYSLER GROUP, LLC
1. Probe the Stabilizer Bar Disengage Illumination Sense circuit with the test light.
2. With the scan tool, actuate the (T529) Stabilizer Bar Engage Illumination Sense circuit.
  Does the test light illuminate and flash on and off?
  
  Yes
  - Replace the Disconnecting Stabilizer Bar Switch.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Go to 7.
(T530) STABILIZER BAR DISENGAGE ILLUMINATION SENSE CIRCUIT FOR A SHORT TO VOLTAGE

Fig 3: Checking Stabilizer Bar Disengage Illumination Sense Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the FDCM harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (T530) Stabilizer Bar Disengage Illumination Sense circuit in the FDCM harness connector.
  Does the voltmeter indicate voltage present?
  
  Yes
  - Repair the short to voltage in the (T530) Stabilizer Bar Disengage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Go To 5.
(T530) STABILIZER BAR DISENGAGE ILLUMINATION SENSE CIRCUIT FOR A SHORT TO GROUND

Fig 4: Checking Stabilizer Bar Disengage Illumination Sense Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance of the (T530) Stabilizer Bar Disengage Illumination Sense circuit between ground and the FDCM harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the short to ground in the (T530) Stabilizer Bar Disengage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Go To 6.
(T530) STABILIZER BAR DISENGAGE ILLUMINATION SENSE CIRCUIT FOR AN OPEN

Fig 5: Checking Stabilizer Bar Disengage Illumination Sense Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (T530) Stabilizer Bar Disengage Illumination Sense circuit between the Disconnecting Stabilizer Bar Switch harness connector and the FDCM harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go To 10.
  No
  - Repair the open in the (T530) Stabilizer Bar Disengage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE CIRCUIT FOR A SHORT TO VOLTAGE

Fig 6: Checking Stabilizer Bar Engage Illumination Sense Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the FDCM harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (T529) Stabilizer Bar Engage Illumination Sense circuit in the FDCM harness connector.
  Does the voltmeter indicate voltage present?
  
  Yes
  - Repair the short to voltage in the (T529) Stabilizer Bar Engage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Go To 8.
(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE CIRCUIT FOR A SHORT TO GROUND

Fig 7: Checking Stabilizer Bar Engage Illumination Sense Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance of the (T529) Stabilizer Bar Engage Illumination Sense circuit between ground and the FDCM harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the short to ground in the (T529) Stabilizer Bar Engage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Go To 9.
(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE CIRCUIT FOR AN OPEN

Fig 8: Checking Stabilizer Bar Engage Illumination Sense Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (T529) Stabilizer Bar Engage Illumination Sense circuit between the Disconnecting Stabilizer Bar Switch harness connector and the FDCM harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go To 10.
  No
  - Repair the open in the (T529) Stabilizer Bar Engage Illumination Sense circuit.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
FDCM
NOTE:
Before continuing, check the FDCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. 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
  - Repair as necessary.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Replace and program the Final Drive Control Module in accordance with Service Information.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
INTERMITTENT WIRING 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 and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
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.
  - Perform FDCM VERIFICATION TEST. Refer to FDCM VERIFICATION TEST .
  No
  - Test Complete.