Four Wheel Drive (4WD) Low Switch Circuit

Where it lives

For P2771, the switch sits on the circuit this code reports. The description of P2771 reports a fault at the switch.

Check these first

• An open or short in the 4WD low switch circuit
• A failed 4WD low switch
• A corroded 4WD low switch connector
• A failed 4WD control module

What to do next

1. Read the 4WD low switch status on a scan tool
2. Shift the transfer case into 4WD low and watch the switch data
3. Test the 4WD low switch circuit for open and short faults
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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