Scan Tool Testing and Procedures

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.

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.

G sensor (G)
Fixed 2.54 G.

Brake switch (ON, OFF)
This switch signal informs the ESP(R) control module whether the brake is active or not.

Valve power driver (ON, OFF)
ESP(R) control module monitor the supply voltage to solenoid valve power supply driver. If the voltage is supplied, ON is displayed. Beside, OFF is displayed.

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. Right acceleration is displayed by "-", Left acceleration is displayed by "+".

Yaw rate sensor (Deg/s)
Yaw rate sensor is measured by yaw rate / G sensor assembly and output to ESP(R) control module. Right turn is displayed by "-", Left turn is displayed by "+".

Steering angle Sen (0)
Steering wheel rotation angle is measured by steering angle sensor and output to ESP(R) control module. Right turn is displayed by "-", Left turn is displayed by "+".

Steering angle Sen (Neutral, Non neutral)
This indicates steering wheel angle measured by steering angle sensor is in straight-ahead or not.

ESP (R) off state (cont) (ESP (R) ON, ESP (R) OFF)
State of ESP(R) OFF switch.

Engine speed (RPM)
Engine speed computed by reference pulses from ECK

Pump motor driver (ON, OFF)
This parameter indicates the operational condition of the pump motor driver (transistor).

Inlet solenoid RF, Inlet solenoid LF, Inlet solenoid RR, Inlet solenoid LR (ON, OFF)
This parameter indicates the operational condition of the inlet solenoid valve.

Outlet solenoid RF, Outlet solenoid LF, Outlet solenoid RR, Outlet solenoid LR (ON, OFF)
This parameter indicates the operational condition of the outlet solenoid valve.

Cut solenoid No. 1, Cut solenoid No. 2 (ON, OFF)
This parameter indicates the operational condition of left-front or right-rear commutation solenoid valve (No. 1), or right-front or left-rear commutation solenoid valve (No.2).

Suction solenoid No. 1, Suction solenoid No. 2 (ON, OFF)
This parameter indicates the operational condition of left-front or right-rear high pressure switching solenoid valve (No. 1), or right-front or left-rear high pressure switching solenoid valve (No. 2).

Brake Fluid Level (enough, NOT enough)
This parameter indicates brake fluid level is enough or not by brake fluid level switch.