Control Module Communication Bus H Off

Where it lives

For U007A, the part to look at first is the module named here.

Check these first

• Loss of power or ground to a module on bus H
• An open in the bus H wiring feeding that module
• A corroded or backed out pin at the module connector on bus H
• An internal failure in the module that is off bus H

What to do next

1. Read stored codes on every module that shares bus H
2. Check power and ground at the module that is off bus H
3. Test the bus H wiring to that module for an open
4. Check the module connector pins on bus H for corrosion
5. Replace the module that stays off bus H and program it
6. Clear the code and retest

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