ECU Upgrade Failure with a message "Failed(Code: Rule Worker Changing FW Mode Failed: ECU_UPGRADE_CAN)" Jeong, DJ TSC GIT 25 January 2026 10:28 Updated 1. The symptom : ECU Upgrade fails with a message "Failed(Code: Rule Worker Changing FW Mode Failed: ECU_UPGRADE_CAN)" 2. Cause : VCI's firmware is cracked 3. Workaround Related to VCI2 VCI 2 ECU upgrade rule worker changing FW Mode Failed CAN Related articles How to get ECU logs from your tablet on GDS Smart / GENESIS Smart / KDS 2.0 Error code occurred during ECU Upgrade (5021-10-7F7F) Error code occurred during ECU upgrade (1000-01-1010) Error code occurred during ECU upgrade (5021-10-7000, 5021-81-7000) Error code occurred during ECU upgrade (7000-00-0001) Comments 0 comments Article is closed for comments.
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