U0241

U0241-LOST COMMUNICATION WITH AUTO HIGHBEAM HEADLAMP CONTROL MODULE





For a complete wiring diagram consult Diagrams/Electrical.


- When Monitored:
With the ignition on.

Battery voltage between 10 and 16 volts.

IOD fuse installed.

TIPM is configured correctly.

- Set Condition:
Bus messages not received from the inside rearview mirror (smartbeam) for approximately 2 to 5 seconds.








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.
Is this DTC active?

Yes


- Go To 2


No


- Refer to the Stored Lost Communication diagnostic procedure. Stored Lost Communication DTCs.




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

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

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

Yes


- Diagnose and repair the DTC.


No


- Go To 3




3. VERIFY THAT THE AHBM (SMARTBEAM) IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select Network View and select Advanced.
Verify that the AHBM (SMARTBEAM) is active on the bus.
Is the AHBM (SMARTBEAM) active on the bus?

Yes


- Go To 4


No


- Perform the No Response diagnostic procedure. Communications - Verbose Codes




4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs "Logged Against" the AHBM (SMARTBEAM)?

Yes


- Replace/update the Inside Rearview Mirror (AHBM) (SMARTBEAM).
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Replace/update the module that set this DTC.
- Perform the appropriate VERIFICATION TEST. Verification Tests