Hybrid/EV Battery Cell Balancing Circuit H Stuck Off

Check these first

• An open balancing shunt on circuit H
• A cell controller that never enables circuit H
• A balancing transistor on circuit H that has failed open
• A broken wire to the circuit H balancing resistor

What to do next

1. Compare the circuit H cell group to the others
2. Command balancing and watch for any change on circuit H
3. Check continuity of the circuit H balancing path
4. Inspect the cell harness connector at circuit H
5. Service the balancing board if circuit H stays inactive
6. Clear the code and retest

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