Invalid Data Received From All Terrain Control Module

Where it lives

For U0439, start at the module the description names.

Check these first

• A weak power or ground feed to the All Terrain Control Module
• An interrupted ground to the All Terrain Control Module
• A poor ground shared with the All Terrain Control Module
• Loss of power or ground at the All Terrain Control Module
• Bent or backed out pins at the All Terrain Control Module connector

What to do next

1. Scan every module and record the stored codes
2. Inspect the All Terrain Control Module connector for corrosion or backed out pins
3. Check the All Terrain Control Module circuit for opens and shorts
4. Check the power and ground feeds to the All Terrain Control Module
5. Replace the All Terrain Control Module if the wiring and voltage tests pass
6. Clear the code and retest

Look up another code