Invalid Data Received From Door Switch B

Where it lives

For U0517, the part to look at first is the switch named here.

Check these first

• A low battery or charging fault that browns out the door switch B
• A fault inside the door switch B itself
• A loose, corroded, or water damaged connector at the door switch B
• An open or short in the door switch B wiring to the module that receives its data
• A lost power or ground feed to the door switch B

What to do next

1. Scan all modules and record the stored and pending network codes
2. Test the door switch B power and ground feeds under load
3. Check the door switch B data bus wiring for opens, shorts, and chafing
4. Confirm the door switch B reports correct live data on the scan tool
5. Repair or replace the door switch B if the circuit, power, and bus tests pass
6. Clear the code and retest to confirm the door switch B fault is gone

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