Invalid Data Received From Door Control Module E

Where it lives

For U0504, start at the module the description names.

Check these first

• A lost power or ground feed to the door control module E
• Stale calibration or an outdated software load in the door control module E
• Electrical noise on the data bus corrupting the door control module E signal
• A low battery or charging fault that browns out the door control module E
• A fault inside the door control module E itself

What to do next

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

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