Acura TSX / Honda Accord CL. Manual - part 274

Fig. 7: VSA Control Unit Pin Voltage Chart (1 Of 3) 

Fig. 8: VSA Control Unit Pin Voltage Chart (2 Of 3)

 

2004 Acura TSX 

2004 BRAKES Vehicle Stability Assist System - TSX

  

 

Fig. 9: VSA Control Unit Pin Voltage Chart (3 Of 3) 

ABS FEATURES 

When the brake pedal is pressed while driving, the wheels can lock before the vehicle comes to a stop. In such 
an event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of the 
vehicle is reduced if the rear wheels are locked, creating an extremely unstable condition. The ABS precisely 
controls the slip rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures 
maneuverability and stability of the vehicle. 

The ABS calculates the slip rate of the wheels based on the vehicle speed and the wheel speed, then it controls 
the brake fluid pressure to reach the target slip rate.

 

2004 Acura TSX 

2004 BRAKES Vehicle Stability Assist System - TSX

  

 

Fig. 10: Grip Force Of Tire & Road Surface 

TCS FEATURES 

The TCS provides low-speed traction. When a drive wheel loses traction on a slippery road surface and starts to 
spin, the VSA modulator-control unit applies brake pressure to slow the spinning wheel. At that time, the VSA 
control unit sends a traction control signal to the ECM/PCM to reduce engine power. 

 

2004 Acura TSX 

2004 BRAKES Vehicle Stability Assist System - TSX

  

 

Fig. 11: TCS Operation 

VSA SYSTEM FEATURES 

Oversteer Control 

z

Applies the brake to the front and rear outside wheels 

Fig. 12: VSA Oversteer Control 

Understeer Control (In Acceleration) 

z

Applies the brake to the front and rear inside wheels  

z

Cuts the engine torque by controlling the sub throttle 

 

2004 Acura TSX 

2004 BRAKES Vehicle Stability Assist System - TSX