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.
  
  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.
(A413) FUSED B(+) CIRCUIT OPEN OR SHORTED

Fig 1: Checking Fused B(+) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Radio C1 harness connector.
3. Using a 12-volt test light connected to ground, check each (A413) Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go to step 3
  No
  - Repair the (A413) Fused B(+) circuit for an open or short.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(Z937) GROUND CIRCUIT OPEN

Fig 2: Checking Ground Circuit
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to 12-volts, check each (Z937) ground circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go to step 4
  No
  - Repair the (Z937) ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(D55) AND (D54) CAN B BUS CIRCUITS OPEN

Fig 3: Checking CAN B Bus Circuits
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
  NOTE: One open circuit will not cause this condition.
2. Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
3. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
  Is there any voltage present on either circuit?
  
  Yes
  - Replace the Radio in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .