Fail-Safe System

The Mazda electronically controlled power steering system incorporates several fail-safe systems designed to maintain vehicle control under a wide variety of possible power steering malfunctions.

• If an engine speed malfunction occurs, the control unit will read the vehicle speed input and normal function will occur.
• If the vehicle speed sensor malfunctions, the control unit will seek an engine speed signal of 2200 RPM for 30 seconds. If this signal is present and vehicle speed is below 50 MPH (80 KPH), steering effort will be set at the 50 MPH (80 KPH) level. If the vehicle speed is above 50 MPH (80 KPH), the steering effort level will be maintained at level at which failure occurred.
• If the steering angle sensor malfunctions and the vehicle speed is greater than 25 MPH (40 KPH) with a continuous steering angle of 35+ degrees for more than 80 seconds, steering effort will be decreased slightly at speeds above 25 MPH (40 KPH).
• If the stepping motor, control unit or electrical circuit malfunctions, the steering effort will be adjusted to a 50 MPH (80 KPH) level.