Voluntary service campaign: iccu software upgrade or iccu assembly and fuse replacement (SC271)

Bulletin number

SC271_TSB

Component

Engine and engine cooling

Summary

VOLUNTARY SERVICE CAMPAIGN: ICCU SOFTWARE UPGRADE OR ICCU ASSEMBLY AND FUSE REPLACEMENT (SC271) - This bulletin provides information to inspect the Integrated Charging Control Unit ("ICCU") in certain 2022-2023MY EV6 (CV) vehicles manufactured from November 17, 2021 through May 30, 2023. Depending on the results of the inspection, dealers are to either install an improved ICCU software logic or replace the ICCU and ICCU Fuse. The ICCU in the subject vehicle may get damaged due to an over-current condition in the high-voltage system. This condition may cause the illumination of the "Service Warning Light," "Check electric vehicle system", and/or "Stop vehicle and check power supply" warning messages, along with audible beeps, instructing the driver to stop the vehicle at a safe location.

Owners of these vehicles have filed 28 complaints in the engine category.