Diagnostic Test

VERIFY DTC U0019-CAN B BUS IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read ORC DTCs.
  Does the scan tool display active: U0019-CAN B BUS?
  
  Yes
  - Go To 2
  No
  - If the DTC is stored, check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - AIRBAG SYSTEM VERIFICATION TEST .
CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE (FCM)
1. With the scan tool, read TIPM DTCs
  Does the scan tool display any active CAN B BUS related DTCs?
  
  Yes
  - Diagnose and repair the DTC(s). Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Disconnect the ORC connectors.
  NOTE:
  Check connectors - Clean and repair as necessary.
2. Connect the Load Tool ORC (special tool #8443-25, 56 Way ACM Adapter) Adaptor to the ORC C2 connectors.
3. Disconnect the TIPM C7 connector.
4. Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM C7 connector and the ORC C2 connector.
  Is the resistance below 2.0 ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (D55) CAN B Bus (+) circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - AIRBAG SYSTEM VERIFICATION TEST .
CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D54) CAN B Bus (-) circuit between the TIPM C7 connector and the ORC C2 connector.
  Is the resistance below 2.0 ohms?
  
  Yes
  
  WARNING:
  If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.
  - Replace the ORC in accordance with the Service Information.
  No
  - Repair the (D54) CAN B Bus (-) circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - AIRBAG SYSTEM VERIFICATION TEST .