Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Liberty. 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.
(Z913) GROUND CIRCUIT OPEN

Fig 1: CHECKING GROUND CIRCUIT FOR OPEN
Courtesy of CHRYSLER LLC
1. Disconnect the Occupant Classification Module harness connectors.
2. Using a 12-volt test light connected to 12-volts, check the (Z913) ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 3
  No
  - Repair the (Z913) ground circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
(A27) FUSED B+ CIRCUIT OPEN OR SHORTED

Fig 2: CHECKING FUSED B+ CIRCUIT FOR OPEN OR SHORT
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to ground, check the (A27) Fused B+ circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 4
  No
  - Repair the (A27) Fused B+ circuit for an open or short.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
(D65) CAN C BUS (+) CIRCUIT OPEN

Fig 3: CHECKING CAN C BUS (+) CIRCUIT FOR OPEN
Courtesy of CHRYSLER 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 Occupant Classification 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 AIRBAG SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
(D64) CAN C BUS (-) CIRCUIT OPEN

Fig 4: CHECKING CAN C BUS (-) CIRCUIT FOR OPEN
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Occupant Classification Module connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Replace the Occupant Classification Module in accordance with the Service Information.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
  No
  - Repair the (D64) CAN C Bus (-) circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure