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.

CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)S
NOTE: Check for any Technical Service Bulletins (TSBs) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Using the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds each cycle.
3. Using the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 2
  No
  - If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out or corroded terminals.
CHECK TIPM FOR U0019 DTC
1. Using the scan tool, read TIPM active DTCs
  Does the scan tool display U0019 CAN B BUS - ACTIVE?
  
  Yes
  - See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the U0019 CAN B BUS diagnostic procedure.
  No
  - Go to step 3
(D55) CAN B BUS (+) CIRCUIT OPEN

Fig 1: Checking Can B Bus (+) Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C3 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (D55) CAN B Bus (+) circuit.
  Is any voltage present on this circuit?
  
  Yes
  - Go to step 4
  No
  - Repair the (D55) CAN B Bus (+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(D54) CAN B BUS (-) CIRCUIT OPEN

Fig 2: Checking CAN B Bus (-) Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (D54) CAN B Bus (-) circuit.
  Is any voltage present on this circuit?
  
  Yes
  - Replace the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the (D54) CAN B Bus (-) circuit for an open.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .