Occupant Restraint Controller (ORC)

U0019-CAN B BUS







- When Monitored:
Continuously

- Set Condition:
Whenever the CAN B Bus (+) or CAN B Bus (-) circuit is open, shorted to voltage, or shorted to ground.





1. VERIFY DTC U0019-CAN B BUS IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read Occupant Restraint Controller (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 ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

2. CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE TOTALLY INTEGRATED POWER MODULE (TIPM)
1. With the scan tool, read Totally Integrated Power Module (TIPM) DTCs

Does the scan tool display any active CAN B BUS related DTCs?

Yes

- Diagnose and repair the DTC(s). Testing and Inspection.

No

- Go To 3

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.

WARNING: If the Occupant Restraint Controller is dropped at any time, it must be replaced. Failure to follow the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.

1. Disconnect the ORC C2 connector.

NOTE: Check connectors - Clean and repair as necessary.

2. Connect the Load Tool ORC 8443-24 Adaptor to the ORC C2 connector.
3. Disconnect the TIPM C3 connector.
4. Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM C3 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 ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

4. CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D54) CAN B Bus (-) circuit between the TIPM C3 connector and the ORC C2 connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the ORC.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

No

- Repair the (D54) CAN B Bus (-) circuit for an open.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.