Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

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: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With 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.
(Z901) GROUND CIRCUITS OPEN

Fig 1: Checking Ground Circuits
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the ABS harness connector.
3. Using a 12-volt test light connected to 12-volts, check both (Z901) ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go to step 3
  No
  - Repair the (Z901) ground circuits for an open.
  - Perform the ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure
(F202) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR SHORTED

Fig 2: Checking Ignition Switch Output (Run-Start) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F202) Ignition Switch Output (Run-Start) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 4
  No
  - Repair the (F202) Ignition Switch Output (Run-Start) circuit for an open or short.
  - Perform the ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure
(D65) CAN C BUS (+) CIRCUIT OPEN

Fig 3: Checking CAN C Bus (+) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C3 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM connector and the Antilock Brake Module connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (D65) CAN C Bus (+) circuit for an open.
  - Perform the ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure
(D64) CAN C BUS (-) CIRCUIT OPEN

Fig 4: Checking CAN C Bus (-) Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM connector and the Antilock Brake Module connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Replace the Antilock Brake Module in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure
  No
  - Repair the (D64) CAN C Bus (-) circuit for an open.
  - Perform the ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure