Control Module A Disable Circuit High

Where it lives

For U3027, the module sits on the circuit this code reports. The description of U3027 reports a fault at the module.

Check these first

• A short to voltage on the control module A disable circuit
• A failed control module A disable driver
• A wiring fault holding the disable circuit high
• A failed control module A

What to do next

1. Read control module A disable status on a scan tool
2. Test the control module A disable circuit for a short to voltage
3. Inspect the control module A disable wiring and connector
4. Compare the disable signal against the commanded state
5. Repair the disable circuit or replace control module A if it stays high
6. Clear the code and retest

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