GM Service Manual Online
For 1990-2009 cars only

The ABS scan tool data definitions contain a brief description of all ABS related parameters available on the scan tool. The parameters available on the scan tool are listed below in alphanumeric order.

ABS Active: The scan tool displays Yes/No. The scan tool displays No when a when not active.

ABS Failed: The scan tool displays On/Off. The scan tool displays Off when a when not active.

Battery Voltage Signal: The scan tool displays 0-18 Volts. The scan tool displays approximately 12 Volts when the ignition is ON.

Brake Fluid Level Status: The scan tool displays 0-18 Volts. The scan tool displays approximately 12 Volts when the ignition is ON.

Brake Pressure Sensor Input: The scan tool displays 0-5 Volts. The scan tool displays approximately 1.5 Volts when the ignition is ON.

Brake Pedal Position Signal (BPP): The scan tool displays Applied/Released. The scan tool indicates Released when the brake is not applied.

Delivered Torque: The scan tool displays 0-100 percent. The scan tool displays the duty cycle of the Delivered Torque PWM signal. The duty cycle of the signal is used to transmit how much engine torque the PCM is delivering. Normal values are between 10 and 90 percent duty cycle.

DRP Active: The scan tool will display Yes/No depending on the state of the DRP.

DRP Disabled: The scan tool will display Yes/No depending on the state of the DRP.

Engine Drag Control Failed: The scan tool will display Yes/No depending on the state of traction of the tires and engine RPM.

HBB Calibration Status: The scan tool will display Failed or Applied. The scan tool displays Applied when the calibration is complete.

Lateral Accelerometer Signal: The scan tool will display 0-5 Volts. The scan tool displays approximately 2.5 volts when the ignition is ON, and the vehicle is stationary.

Ignition Voltage Signal: The scan tool displays 0-18 Volts. The scan tool displays approximately 12 Volts when the ignition is ON.

LF Wheel Speed Sensor: The scan tool displays 0-327 km/h (0-204 mph). The scan tool displays 0 km/h (0 mph) when the vehicle is not moving or is moving at speeds less than or equal to 0 km/h (0 mph).

LR Wheel Speed Sensor: The scan tool displays 0-327 km/h (0-204 mph). The scan tool displays 0 km/h (0 mph) when the vehicle is not moving or is moving at speeds less than or equal to 0 km/h (0 mph).

LF Outlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the left front Outlet valve solenoid is commanded on.

LR Outlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the left front Outlet valve solenoid is commanded on.

Panic Brake Assist Failed: The scan tool will display Yes/No depending on the state of traction of the tires and engine RPM.

Pump Motor Command Voltage: The scan tool will display Voltage when the pump motor is active.

Requested Torque: The scan tool displays 0-10 percent. The scan tool displays the duty cycle of the Requested Torque PWM signal. The duty cycle of the signal is used to transmit how much engine torque the EBCM is requested .

RF Outlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the right front Outlet valve solenoid is commanded on.

RF Inlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the right front Inlet valve solenoid is commanded on.

RF Wheel Speed Sensor: The scan tool displays 0-327 km/h (0-204 mph). The scan tool displays 0 km/h (0 mph) when the vehicle is not moving or is moving at speeds less than or equal to 0 km/h (0 mph).

RR Wheel Speed Sensor: The scan tool displays 0-327 km/h (0-204 mph). The scan tool displays 0 km/h (0 mph) when the vehicle is not moving or is moving at speeds less than or equal to 0 km/h (0 mph).

RR Outlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the right front Inlet valve solenoid is commanded on.

RR Inlet Valve Command: The scan tool displays Active/Inactive. The scan tool displays Active when the right front Inlet valve solenoid is commanded on.

Steering Wheel Position: The scan tool will display Steering Angle Sensor. The scan tool will display the signal received from the Steering Angle Sensor.

TCS Active: The scan tool will display Yes or No depending on the state of the Traction Control.

TCS Failed: The scan tool will display Yes or No depending on the state of the Traction Control

VSES Active: The scan tool displays Yes or No. The scan tool displays Yes when VSES is active, and No when VSES is inactive.

VSES Failed: The scan tool will display Yes or No depending on the state of the ABS indicator.

Yaw Rate Sensor: The scan tool will display Volts, depending on the angle of the vehicle.