Control Module Input Power C Circuit Range/Performance

Where it lives

For U3508, the description names the module as the part involved.

Check these first

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

What to do next

1. Read input power C voltage on a scan tool
2. Compare input power C against battery voltage
3. Test the input power C 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

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