P1566 Cruise Control Main Switch Circuit Malfunction
What does P1566 mean on a Toyota?
P1566 — Cruise Control Main Switch Circuit Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4, Tacoma.
Common causes of P1566
- Failed cruise main switch
- Open switch circuit in the steering wheel
- Broken clockspring spiral cable
- Corroded switch connector
- ECM input fault
How to fix P1566
- Test main switch continuity
- Check clockspring continuity through rotation
- Verify the ECM sees the switch
- Inspect connectors
- Replace the switch or clockspring per tests