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Home >> Acura >> 2021 >> RDX Base >> Repair and Diagnosis >> Brakes >> Traction Control >> VSA System - Testing & Troubleshooting >> VSA System Description >> System Diagram
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System Diagram

The system diagram of the VSA system is shown below.

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

GHH558239Courtesy of HONDA, U.S.A., INC.

F-CAN Communication Data 

VSA SYSTEM RECEIVING SIGNAL

Transmitting Unit Signal Name
PCM
  • VSA control enable/disable signal
  • Accelerator pedal position signal
  • Engine speed signal
  • Engine torque signal
  • Brake pedal position switch signal
  • Integrated dynamics system mode signal
  • Auto idle stop status
  • Starting assist brake function activation request
  • Service check signal
  • System failure information
TCM
  • Shift position signal
  • Gear position signal
  • System failure information
Gauge control module
  • VSA OFF switch signal
  • Brake fluid level switch signal
  • Automatic brake hold switch signal
SRS unit
  • Yaw rate signal
  • Lateral acceleration signal
  • Longitudinal acceleration signal
  • Driver's seat belt buckle switch status
  • System failure information
Steering angle sensor
  • Steering angle signal
Electric brake booster
  • Hydraulic boost failure compensation control request
  • System operating state signal
  • System failure information
SH-AWD control unit *
  • Left-rear target axle torque
  • Right-rear target axle torque
Millimeter wave radar
  • Deceleration request signal
  • System operating state signal
  • System failure information
*: With AWD 
VSA SYSTEM TRANSMITTING SIGNAL

Transmitting Unit Signal Name
VSA modulator-control unit
  • Engine torque control request signal
  • Rear torque control request *1
  • Shift control request signal
  • Wheel speed signals
  • Wheel rotational direction signals *2
  • Vehicle speed signal
  • Master cylinder pressure signal
  • External brake control mode signal
  • External brake target pressure rate signal
  • Auto idle stop inhibit signal
  • Integrated dynamics system mode transition inhibit signal
  • Estimated brake pad temperature signal
  • Estimated L/R ' differential signal
  • Estimated longitudinal acceleration signal
  • Vehicle understeering state
  • Buzzer request signal
  • System operating status
  • Indicator drive signal
  • System failure information
*1: With AWD 
*2:'22-23