Control Module Cooling Fan Circuit Low

Where it lives

For U350D, the module sits on the circuit this code reports. The description of U350D reports a fault at the module.

Check these first

• A short to ground on the control module cooling fan circuit
• A failed cooling fan
• High resistance in the cooling fan wiring
• A failed module that drives the cooling fan

What to do next

1. Read control module cooling fan status on a scan tool
2. Command the control module cooling fan on and off
3. Test the cooling fan circuit for a short to ground
4. Check the cooling fan for free movement and load
5. Repair the circuit or replace the fan or module if the signal stays low
6. Clear the code and retest

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