Restraints

U0019-CAN B BUS

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
Continuously

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





Diagnostic Test

1. VERIFY DTC U0019-CAN B BUS IS ACTIVE
Turn the ignition on.
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 *AIRBAG SYSTEM VERIFICATION TEST - VER 1. Airbag System Verification Test

2. CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE (FCM)
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).Testing and Inspection

No

- Go to 3

3. CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

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

Disconnect the ORC C2 connector.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-25 Adaptor to the ORC C2 connector.
Disconnect the TIPM C7 connector.
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 *AIRBAG SYSTEM VERIFICATION TEST - VER 1. Airbag System Verification Test

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

- Replace the ORC.

No

- Repair the (D54) CAN B Bus (-) circuit for an open.
- Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1. Airbag System Verification Test