EPS System Description - System Diagram

WARNING: This page is about a different variant/trim than selected.

The steering force of the steering wheel is detected by the torque sensor, and the signal is sent to the EPS control unit. The EPS control unit calculates the assistance torque based on the steering torque signal and vehicle speed signal, and activates the motor to assists the steering force.
To activate the three-phase brushless motor properly, the motor angle sensor detects the motor angle, and sends the signal to the EPS control unit.
The EPS control unit sends the motor load status to the PCM.
The EPS control unit receives the vehicle behavior information from the VSA modulator-control unit.
The EPS control unit assists the steering force when the EPS control unit receives the steering assist request from the millimeter wave radar.
When the EPS system detects a problem, the EPS control unit stores the DTC, and sends the signal to the gauge control module to cause the EPS indicator to come on.

For locations of each component on vehicle, refer to Component Location Index:

Courtesy of HONDA, U.S.A., INC.

F-CAN Communication Data

EPS System Receiving Signal

Transmitting Unit	Signal Name
Gauge control module	Driver's door switch signal Wiper switch status Customize information
PCM	Engine speed signal Vehicle speed signal Shift position signal Idle stop status Cruise control status Service check signal System failure information
Millimeter wave radar	LKAS mode signal Instructing current signal System failure information
VSA modulator-control unit	Wheel speed signal System operating state signal Vehicle understeering state Vehicle estimated longitudinal acceleration signal Estimated L/R μ differential signal System failure information
SRS unit	Yaw rate signal Lateral acceleration signal Longitudinal acceleration signal Driver's seat belt buckle switch status

EPS System Transmitting Signal

Transmitting Unit	Signal Name
EPS control unit	Indicator drive signal Motor load status Steering angle signal Steering speed signal System failure Information Attentiveness level indication request Steering torque signal Motor speed signal