Electronic Stability Program (ESP)

Scan Tool Data
The parameter data below are values measured with the scan tool when the normally operating vehicle is under the following conditions. When taking measurements for comparison by using the scan tool, be sure to check that the vehicle is under the following conditions.
^ Apply parking brake and block wheels.
^ Ignition switch ON.
^ Turn OFF air conditioning (if equipped).
^ Set the wheel in straight-ahead position and hands off steering wheel.
^ Turn OFF all electric loads (except ignition).
^ Check that there is no DTC.





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 This parameter indicates the operational condition of the pump motor driver Driver (V) (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 (°) Steering wheel rotation angle is measured by steering angle sensor and output to ESP(R) control module by pulse signal.

Stability control (ACTIVE, INACTIVE) This indicates stability control in activation / deactivation.

TCS control (brake)(ACTIVE, INACTIVE) This indicates brake function of TCS in activation / deactivation.

TCS control (engine) (ACTIVE, INACTIVE) This indicates torque control of TCS in activation / deactivation.

ESP(R) off state (cont) (ESP(R) ON, ESP(R) OFF) State of ESP(R) OFF switch.
Steering angle Sen (Neutral, NON neutral) This indicates steering wheel angle measured by steering angle sensor is in straight-ahead or not.