P1770
Differential Lock Solenoid Circuit Malfunction
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Check Engine Light Is On
- Differential lock does not engage
- Differential lock engages spontaneously
- Reduced vehicle cross-country ability
- Unusual noises from the differential area
Causes
- Open or short circuit in solenoid circuit
- Faulty differential lock solenoid
- Damaged wiring harness
- Poor contact in connectors
- Control unit malfunction
How to Fix
- Check the continuity of the solenoid circuit
- Check solenoid resistance
- Inspect connectors and wiring harness for damage
- If necessary, replace the differential lock solenoid
- Check the operation of the control unit