Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS 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, diagnose any Stabilizer Select Switch 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 7
DISCONNECTING STABILIZER BAR SWITCH
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. Turn the ignition on.
4. Using a test light connected to battery voltage, probe the (T532) Locker Open LED Sense circuit in the Disconnecting Stabilizer Bar Switch harness connector.
5. With the scan tool select System Test and actuate the Locker Open LED LED. Select the blinking option.
  NOTE:
  Repeat the above test for the (T533) Locker Rear LED Sense circuit and (T534) Locker FR/RR LED Sense circuit one at a time.
  
  Does the test light illuminate and flash on and off at each circuit?
  
  Yes
  - Go To 3
  No
  - Go to 5
(T536) SWITCH SUPPLY CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Disconnecting Stabilizer Bar Switch harness connector
3. Disconnect the FDCM harness connector.
4. Turn the ignition on.
5. Measure the voltage on the (T536) Switch Supply circuit in the Disconnecting Stabilizer Switch harness connector.
  Does the voltmeter indicate voltage present?
  
  Yes
  - Replace the Disconnecting Stabilizer Bar Switch.
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(T536) SWITCH SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Measure the resistance of the (T536) Switch Supply circuit between the Disconnecting Stabilizer Switch harness connector and the FDCM harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace the FDCM in accordance with the Service Information.
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the Switch Supply circuit.
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(T532, T533 or T534) LOCKER LED SENSE CIRCUIT SHORTED TO VOLTAGE
1. Disconnect the Disconnecting Stabilizer Switch harness connector.
2. Measure the voltage at each of the following circuit at the FDCM harness connector.
  - (T532) Locker Open LED Sense circuit
  - (T533) Locker Rear LED Sense circuit
  - (T534) Locker FR/RR LED Sense circuit
  Does the voltmeter indicate voltage present for any of the above circuit?
  
  Yes
  - Repair the Locker LED Sense circuit that indicated a short to voltage.
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
(T532, T533 or T534) LOCKER LED SENSE CIRCUIT OPEN
1. Measure the resistance of each of the following circuits between the FDCM harness connector and the Disconnecting Stabilizer Switch harness connector.
  - (T532) Locker Open LED Sense circuit
  - (T533) Locker Rear LED Sense circuit
  - (T534) Locker FR/RR LED Sense circuit
  Does the ohmmeter indicate each measurement below 5.0 ohms?
  
  Yes
  - Replace the Final Drive Control Module (FDCM) in accordance with the Service Information. Refer to ACTUATOR, STABILIZER BAR, REMOVAL .
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the Locker LED Sense circuit that indicated an open circuit.
  - Perform FDCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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 STANDARD PROCEDURE .
  No
  - Test Complete.