Four Wheel Drive (4WD) Low Switch Circuit High

Where it lives

For P2774, the circuit described runs through the switch. The description of P2774 reports a fault at the switch.

Check these first

• A short to voltage in the 4WD low switch circuit
• An open return in the 4WD low switch circuit
• A failed 4WD low switch
• A failed 4WD control module

What to do next

1. Read the 4WD low switch status on a scan tool
2. Test the 4WD low switch circuit for a short to voltage
3. Test the 4WD low switch circuit for an open return
4. Check the 4WD low switch connector pins
5. Replace the 4WD low switch if the circuit tests good
6. Clear the code and retest

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