GM Service Manual Online
For 1990-2009 cars only
Table 1: Electronic Brake Control Module Scan Tool Data Parameters
Table 2: Electronic Brake Control Module Scan Tool Output Controls

The electronic brake control module (EBCM) scan tool data parameters list contains all ABS-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists.

Electronic Brake Control Module Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

ABS Pump Motor Voltage

--

0.0 V

The scan tool displays the commanded pump motor voltage.

Acceleration Sensor Longitudinal Signal

--

0.0-0.3 V

The scan tool displays 0-5 V depending on the vehicle's longitudinal acceleration.

Antilock Braking System Malfunction

--

No

The scan tool displays Yes or No. Yes is displayed if there is an ABS malfunction.

Brake Fluid Level Sensor

--

Inactive

The scan tool displays Inactive when the brake fluid is at correct level and Active when the brake fluid is low.

Brake Pressure Sensor

Brake pedal released

0.0-0.3 V

The scan tool displays 0-5 V depending on the applied hydraulic brake pressure.

Brake pedal applied

0.3-5.0 V

Brake Lamp Switch

Brake pedal released

Inactive

The scan tool displays Inactive or Active depending on the state of the brake pedal.

Brake pedal applied

Active

Delivered Torque

--

0%

The scan tool displays 0-100% depending on the how much torque the engine is delivering.

Dynamic Rear Proportioning Status

--

OK

The scan tool displays OK or Malfunction. Malfunction is displayed if the EBCM disables the dynamic rear proportioning due to a fault.

Lateral Acceleration Signal

--

0.0-0.3 V

The scan tool displays 0-5 V depending on the vehicle's lateral acceleration.

Left Front Inlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the left front inlet solenoid is commanded ON.

Left Front Outlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the left front outlet solenoid is commanded ON.

Left Front Wheel Speed Sensor

--

0 km/h (0 MPH)

The scan tool displays km/h (MPH) depending on the current speed of the left front wheel speed sensor.

Left Rear Inlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the left rear inlet solenoid is commanded ON.

Left Rear Outlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the left rear outlet solenoid is commanded ON.

Left Rear Wheel Speed Sensor

--

0 km/h (0 MPH)

The scan tool displays km/h (MPH) depending on the current speed of the left rear wheel speed sensor.

Panic Brake Assist Status

--

OK

The scan tool displays OK or Malfunction. Malfunction is displayed if the EBCM disables the panic brake assist due to a fault.

Pump Motor Relay Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the pump motor is commanded ON.

Requested Torque

--

0%

The scan tool displays 0-100% depending on the how much torque is requested.

Right Front Inlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the right front inlet solenoid is commanded ON.

Right Front Outlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the right front outlet solenoid is commanded ON.

Right Front Wheel Speed Sensor

--

0 km/h (0 MPH)

The scan tool displays km/h (MPH) depending on the current speed of the right front wheel speed sensor.

Right Rear Inlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the right rear inlet solenoid is commanded ON.

Right Rear Outlet Solenoid Valve Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the right rear outlet solenoid is commanded ON.

Right Rear Wheel Speed Sensor

--

0 km/h (0 MPH)

The scan tool displays km/h (MPH) depending on the current speed of the right rear wheel speed sensor.

Steering Column Position

Steering wheel in straight position

-5 to +5°

The scan tool displays °. This is the current position of the steering angle sensor.

Steering wheel turned left until stop

-500 to -450°

Steering wheel turned right until stop

450-500°

System Voltage

--

11-14 V

The scan tool displays V. This is the current battery voltage.

Traction Control Switch

Traction control switch released

Inactive

The scan tool displays Inactive or Active depending on the traction control switch status.

Traction control switch pressed

Active

Traction Control System Malfunction

--

No

The scan tool displays Yes or No. Yes is displayed if there is a traction control malfunction.

Variable Effort Steering Solenoid Valve Command

--

Varies

The scan tool displays A. This is the current applied to the variable effort steering solenoid valve.

Variable Effort Steering Solenoid Valve Feedback

--

Varies

The scan tool displays A. This is the current applied to the variable effort steering solenoid valve feedback signal.

Vehicle Stability Enhancement System Malfunction

--

No

The scan tool displays Yes or No. Yes is displayed if there is a stability control malfunction.

Vehicle Stability Enhancement System Relay Feedback

--

Inactive

The scan tool displays Inactive or Active. Active is displayed when the stability control is active.

Vehicle Stability Enhancement System Switch

Traction control switch released

Inactive

The scan tool displays Inactive or Active depending on the traction control switch status.

Traction control switch pressed for 5 s

Active

Yaw Rate Sensor

--

0-0.3 V

The scan tool displays 0-5 V depending on the vehicle's yaw rate.

Electronic Brake Control Module Scan Tool Output Controls

Output Control

Description

ABS Pump Motor

Commands the ABS pump motor Increase or Decrease.

Left Front ABS Solenoid Valves

Commands the solenoid valve ON or OFF.

Left Front Traction Control Solenoid Valves

Commands the solenoid valve ON or OFF.

Left Rear ABS Solenoid Valves

Commands the solenoid valve ON or OFF.

Left Rear Traction Control Solenoid Valves

Commands the solenoid valve ON or OFF.

Pressure Control Solenoid Valve

Commands the solenoid valve Increase or Decrease.

Right Front ABS Solenoid Valves

Commands the solenoid valve ON or OFF.

Right Front Traction Control Solenoid Valves

Commands the solenoid valve ON or OFF.

Right Rear ABS Solenoid Valves

Commands the solenoid valve ON or OFF.

Right Rear Traction Control Solenoid Valves

Commands the solenoid valve ON or OFF.