Occupant Restraint Controller (ORC)

U0019-CAN B BUS





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- 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) DTC.

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 ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

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

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

Yes

- Diagnose and repair the DTC. 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.

1. Turn the ignition off.
2. Disconnect the ORC connectors.
3. Disconnect the Totally Integrated Power Module (TIPM) C6 connector.
4. Measure the resistance of the (D55) CAN B Bus (+) circuit between the Totally Integrated Power Module (TIPM) C6 connector and the ORC connector 24 way cavity 3.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (D55) CAN B Bus (+) circuit for an open.
- Perform 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 Totally Integrated Power Module (TIPM) C6 connector and the ORC connector 24 way cavity 4.

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

No

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