U0151

U0151-LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER (ORC)





For complete wiring diagram refer to the wiring section.

WHEN MONITORED
- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- FCM is configured correctly

SET CONDITION
Bus messages not received from the Occupant Restraint Controller for approximately 2 to 5 seconds.

POSSIBLE CAUSES
- CAN B BUS CIRCUITS OPEN OR SHORTED
- DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
- FCM NOT CONFIGURED CORRECTLY
- OCCUPANT RESTRAINT CONTROLLER
- OCCUPANT RESTRAINT CONTROLLERS POWER AND GROUND
- MODULE THAT SET THIS DTC

DIAGNOSTIC TEST

1. VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs.

Q: Is this DTC active?

YES: Go To 2
NO: Refer to the Stored Lost Communication test procedure. Refer to the table of contents. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read all active DTCs from all modules.

NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Q: Does the scan tool display any active DTCs to the conditions listed above?

YES: Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. VERIFY THAT THE ORC IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the ORC is active on the bus.

Q: Is the ORC active on the bus?

YES: Go To 4
NO: Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for No Response diagnostic procedures. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network Diagnostics.

Q: Is there more than one module with active DTCs "Logged Against" the ORC?

YES: Replace/update the Occupant Restraint Controller in accordance with the service information. Perform AIRBAG VERIFICATION TEST - VER 1.
NO: Replace/update the module that set this DTC in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test