Occupant Restraint Controller (ORC)

U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE





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

- When Monitored:

- With the ignition on
- Battery voltage between 10 and 16 volts
- Ignition Off Draw (IOD) fused installed.
- Set Condition:
If the Occupant Restraint Controller (ORC) Bus messages not received from the Antilock Brake Module (ABS) for approximately two to five seconds.





VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

1. Turn the ignition on.
2. With the scan tool, read ORC DTCs.

Is the U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE DTC active?

Yes

- Testing and Inspection and perform the U0121-Lost Communication with Anti-lock Brake System (ABS) Control Module diagnostic procedure.

No

- and perform the Stored Lost Communication DTCs diagnostic procedure Stored Lost Communication DTCs.