Battery Isolation/Voltage Stabilization Control Circuit Intermittent

Check these first

• An intermittent connection in the battery isolation control circuit
• A chafed isolation control wire making contact only sometimes
• A failing isolation relay with an unstable coil
• Corrosion at the isolation control connector

What to do next

1. Watch battery isolation commanded state on a scan tool
2. Wiggle test the isolation control harness while watching live data
3. Test the isolation control circuit for an intermittent open
4. Inspect the isolation relay and connector
5. Replace the voltage stabilization control relay if the fault returns
6. Clear the code and retest

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