Vehicle Communication Bus F

Check these first

• An open or short on the bus F data line between modules
• A corroded or backed out pin at a module connector on bus F
• A module on bus F holding the data line off
• Chafing or water intrusion along the bus F run

What to do next

1. Read stored codes on every module that shares bus F
2. Inspect the bus F wiring and connectors for chafe, corrosion, and water
3. Test bus F for opens, shorts, and added resistance with the battery disconnected
4. Repair or replace the damaged section of bus F
5. Test or replace the module that stays off line on bus F
6. Clear the code and retest

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