LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2018 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> On-Board Diagnostic - Radar Unit >> DTC U0420-00: Error Signal Received From Electric Power Steering (EPS) Control Module >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U0420-00: Error Signal Received From Electric Power Steering (EPS) Control Module: Notes

DTC U0420:00 (Radar Unit) DETECTION CONDITION AND POSSIBLE CAUSE

Description Error Signal Received From Electric Power Steering (EPS) Control Module
Detection Condition
  • Communication error between electric power steering (EPS) control module and radar unit
Fail-safe
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the smart brake support (SBS) system control
  • Inhibits the distance recognition support system (DRSS) control
Possible Cause
  • DTCs are stored in the electric power steering (EPS) control module.
  • Electric power steering (EPS) control module malfunction
  • Radar unit malfunction
System Wiring Diagram Not applicable
scientia non olet · About LEMON Manuals