Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
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. Turn the ignition on.
2. Using the scan tool, record and erase TIPM DTCs.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on.
5. Using the scan tool, read active TIPM DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 2
  No
  - Test complete, the condition or conditions that originally set this DTC are 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.
ATTEMPT TO ISOLATE THE OPEN CONDITION

Fig 1: Attempting To Isolate CAN B Bus Modules For Open Condition
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. With the scan tool select ECU View.
3. Verify that all CAN B Bus modules are communicating with the scan tool.
  NOTE: A red "X" will be next to a 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: If any module is not communicating, perform the appropriate no response test procedure before proceeding.
4. Turn the ignition off.
5. Gain access to the Totally Integrated Power Module C5 harness connector, but do not disconnect.
6. Using a fused jumper wire, connect one end to ground and with the other end backprobe the CAN B Bus (-) circuit at the TIPM C5 harness connector.
7. Turn the ignition on.
8. With the scan tool monitor the ECU View screen and document all modules that display a red "X".
  Are there any red "X's" displayed next to any CAN B Bus modules?
  
  Yes
  - Go to step 3
  No
  - Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
ATTEMPT TO ISOLATE THE OPEN CONDITION - MULTIPLE RED X'S
1. With the scan tool continue monitoring the ECU View screen.
  Are there multiple red "X's" displayed next to CAN B Bus modules?
  
  Yes
  - The most likely cause of this condition is an open CAN B Bus (+) circuit between a common CAN B Bus splice and the modules that display the red "X" next to them. Use the wiring diagrams to help you determine where the open condition exists.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 4
(D55) CAN B BUS (+) CIRCUIT OPEN - SINGLE RED X
1. Turn the ignition off.
2. Disconnect the module that has the red "X" displayed next to it.
3. Turn the ignition on.
4. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
  Is there any voltage present?
  
  Yes
  - Inspect the connector and terminal for damage, inspect for spread terminals, or pushed out terminals. If OK, replace the module that displayed the red "X" next to it in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the (D55) CAN B Bus (+) circuit for an open between the next common splice and the module that has the red X displayed next to it. Use the wiring diagrams to help you determine where the open condition exists.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .