Vcu operation logic improvement (SA634)
Kia technical service bulletin TSB_ELE405_R1 for 2026 Kia EV9.
- Bulletin number
- TSB_ELE405_R1 (SA634)
- Component
- Electrical system
- Summary
- TECHNICAL SERVICE BULLETIN: SERVICE ACTION: VCU OPERATION LOGIC IMPROVEMENT (SA634) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to upgrade the Vehicle Control Unit (VCU) system software on certain 2026MY EV9 (MV1a) vehicles produced from January 2, 2025 through November 3, 2025, where the Integrated Electronic Brake (IEB) Controller Area Network (CAN) times out on startup, resulting in a DTC warning light and failure to restart charging when the connector remains connected after charging is completed. This condition is not associated with any braking or drivability symptoms.
Owners of these vehicles have filed 12 complaints in the electrical category.
Vehicles covered
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