Control Module Input Power A Circuit Range/Performance

Where it lives

For U3500, the description names the module as the part involved.

Check these first

• Voltage on input power A outside its expected range
• High resistance in the input power A circuit
• A weak battery or charging system feeding input power A
• A failed module that misreads input power A

What to do next

1. Read input power A voltage on a scan tool
2. Compare input power A against battery voltage
3. Test the input power A circuit for added resistance
4. Check the battery and charging system
5. Repair the circuit or replace the module if the range stays off
6. Clear the code and retest

Look up another code