Electronic Stability Program

Scan Tool Data


ESP(R) Control Module


As the data values are standard values estimated on the basis of values obtained from the normally operating vehicles by using a scan tool, use them as reference values. Even when the vehicle is in good condition, there may be cases where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not be made by checking with these data alone.






Scan Tool Data Definition

Battery Volt (V)
Battery Voltage is an analog input signal read by the ESP(R) control module. Certain ESP(R) control module functions will be modified if the battery voltage falls below or rises above programmed thresholds.
Pump Motor Driver (V)
This parameter indicates the operational condition of the pump motor driver (transistor).
RF Wheel Speed, LF Wheel Speed, RR Wheel Speed and LR Wheel Speed (km/h, MPH)
Wheel speed is ESP(R) control module internal parameter. It is computed by reference pulses from the wheel speed sensor.
Brake Switch (ON, OFF)
This switch signal informs the ESP(R) control module whether the brake is active or not.
G Sensor (G)
Vehicle acceleration is measured by yaw rate / G sensor assembly and output to ESP(R) control module by pulse signal for 4WD vehicle.
Master Cyl Press (MPa)
Brake fluid pressure from brake master cylinder.
G Sensor (lateral) (G)
Lateral acceleration is measured by yaw rate / G sensor assembly and output to ESP(R) control module by pulse signal.
Yaw Rate Sensor (Deg/s)
Yaw rate sensor is measured by yaw rate / G sensor assembly and output to ESP(R) control module by pulse signal.
Steering Angle Sen (Deg)
Steering wheel rotation angle is measured by steering angle sensor and output to ESP(R) control module by pulse signal.
Stability Control (ON, OFF)
This indicates stability control system in activation / deactivation.
TCSS Control (Brake) (ON, OFF)
This indicates brake function of traction control system in activation / deactivation.
TCSS Control (Engine) (ON, OFF)
This indicates torque control of traction control system in activation / deactivation.
TCSS Off SW State (ON, OFF)
State of ESP(R) OFF switch.
Steering Angle Sig (Neutral, Non N)
This indicates steering wheel angle measured by steering angle sensor is in straight-ahead or not.
Hill Descent Control SW (ON, OFF)
State of hill descent control switch.