Adaptive Cruise Control (ACC) System Description - System Diagram

Based on information on the leading vehicle from the millimeter wave radar, information from the relevant switches via F-CAN, and

information from the relevant sensors, the ACC system causes the multipurpose camera unit to send control and indication requests

to the management ECU, VSA modulator-control unit, and gauge control module via F-CAN to control the vehicle speed, brake, and

system indicators.

The system diagram of the ACC system is shown below.

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

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

F-CAN Communication Data

Multipurpose Camera Unit Receiving Signal:

Originating Unit	Signal Name
Gauge control module	ACC combination switch signal (switch failure information) Turn signal switch information Customization signal
PCM	ACC system driver request: - Accelerator pedal operation status - Cancellation signal - Set vehicle speed signal Vehicle speed signal Cruise control system operating status, Cruise control system failure information Accelerator pedal position (APP) sensor control state signal Brake pedal position switch signal Shift position status PGM-FI system failure information for ACC system Cruise control memory vehicle speed Cruise control inclination information
SRS unit	Yaw rate/G sensor signal, Yaw rate/G sensor failure information
VSA modulator-control unit	Wheel speed sensor signals, Wheel speed sensor failure information Electric parking brake (EPB) dynamic control information VSA system failure information for ACC system Electric parking brake operation information and failure information
Electric servo brake control unit	Brake control state signal Brake light relay control signal, Brake light relay failure information ACC system failure information
EPS control unit	Steering angle signal

Multipurpose Camera Unit Transmitting Signal:

Destination Unit	Signal Name
Gauge control module	Buzzer request signal Multi information display (MID) screen requirement: - ACC indicator ACC system failure information Customization information
PCM	ACC system failure information Target vehicle speed and target acceleration
SRS unit	---
VSA modulator-control unit	Electric parking brake actuation request signal ACC system failure information Low speed following (LSF) function stoppage and retention information Electric parking brake operation requirement

Destination Unit	Signal Name
Electric servo brake control unit	ACC automatic brake activation request ACC system failure information Target ACC brake amount information Brake light relay activation request
EPS control unit	---