Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
  NOTE:
  Make sure the Ignition Off Draw (IOD) fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. Using the scan tool, select ECU View.
  NOTE:
  A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
  
  NOTE:
  Check the TIPM for any active CAN C hardware DTCs. Perform DTC before proceeding.
  
  Does the scan tool display a red "X" next to the module?
  
  Yes
  - Go To Step 2
  No
  - The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched and partially broken wires and the wiring harness connectors for broken, bent, pushed out and corroded terminals.
(A959) FUSED B(+) CIRCUIT OPEN OR SHORTED

Fig 1: Checking Fused B(+) Circuit For Open Or Short
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Final Drive Control Module (ASBS) harness connector.
3. Using a 12-volt test light connected to ground, check each (A959) Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To Step 3
  No
  - Repair the (A959) Fused B(+) circuit for an open or short.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Z905) GROUND CIRCUIT OPEN

Fig 2: Checking Ground Circuit Using 12-Volt Test Light Connected To 12 Volts
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12 volts, check the (Z905) ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To Step 4
  No
  - Repair the (Z905) ground circuit for an open.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED

Fig 3: Checking Fused Run/Start Relay Output Circuit For Open Or Short
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F943) Fused Run/Relay Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To Step 5
  No
  - Repair the (F943) Fused Run/Relay Output circuit for an open or short.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(D65) CAN C BUS (+) CIRCUIT OPEN

Fig 4: Measuring Resistance Of CAN C Bus (+) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Final Drive Control Module (ASBS) connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Go To Step 6
  No
  - Repair the (D65) CAN C Bus (+) circuit for an open.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(D64) CAN C BUS (-) CIRCUIT OPEN

Fig 5: Measuring Resistance Of CAN C Bus (-) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Final Drive Control Module (ASBS) connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Replace the Final Drive Control Module (ASBS) in accordance with the Service Information.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (D64) CAN C Bus (-) circuit for an open.
  - Perform the ASBS VERIFICATION TEST. Refer to STANDARD PROCEDURE .