Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes
(A959) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z904) GROUND CIRCUIT OPEN
(F943) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR SHORTED
(D52) CAN C BUS (+) CIRCUIT OPEN
(D51) CAN C BUS (-) CIRCUIT OPEN
FINAL DRIVE CONTROL MODULE (FDCM)

TEST FOR INTERMITTENT CONDITION
NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
  NOTE:
  Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the TIPM for any active CAN hardware DTCs, perform DTC before proceeding.
  
  Does the scan tool indicate that the module is active on the bus?
  
  Yes
  - The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  No
  - Go To 2.
(A959) FUSED B(+) CIRCUIT OPEN OR SHORTED

Fig 1: Checking Fused B(+) Circuit For Open Or Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Final Drive Control Module harness connector.
3. Using a 12-volt test light connected to ground, check the (A959) Fused B(+) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3.
  No
  - Repair the open or short (A959) Fused B(+) circuit.
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .
(Z904) GROUND CIRCUIT OPEN

Fig 2: Checking Ground Circuit For Open
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to 12-volts, check the (Z904) Ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (Z904) Ground circuit.
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .
(F943) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR SHORTED

Fig 3: Checking Fused Ignition Switch Output Circuit For Open Or Short
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F943) Fused Ignition Switch Output (Run-Start) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the open or short in the (F943) Fused Ignition Switch Output (Run-Start) circuit.
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .
(D52) CAN C BUS (+) CIRCUIT OPEN

Fig 4: Measuring Resistance Of CAN C Bus (+) Circuit Between TIPM Harness Connector & FDCM Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C7 harness connector.
3. Measure the resistance of the (D52) CAN C Bus (+) circuit between the TIPM C7 harness connector and the FDCM harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Go To 6.
  No
  - Repair the open in the (D52) CAN C Bus (+) circuit.
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .
(D51) CAN C BUS (-) CIRCUIT OPEN

Fig 5: Measuring Resistance Of CAN C Bus (-) Circuit Between TIPM Harness Connector & FDCM Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (D51) CAN C Bus (-) circuit between the TIPM C7 harness connector and the FDCM harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Replace the FDCM in accordance with the Service Information. Refer to ACTUATOR, Stabilizer Bar , Removal .
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Repair the open in the (D51) CAN C Bus (-) circuit.
  - Perform the FDCM VERIFICATION TEST. Refer to Standard Procedure .