| Table 1: | Electronic Brake Control Module Scan Tool Data Parameters |
| Table 2: | Electronic Brake Control Module Scan Tool Output Controls |
Parameter | System State | Expected Value | Definition |
|---|---|---|---|
Operating Conditions: Ignition ON, Engine OFF, Brake Released | |||
ABS Active | -- | No | The scan tool displays Yes or No. Indicates if the ABS system is currently performing antilock braking. |
ABS Lamp Command | -- | Off | The scan tool displays On or Off. The currently commanded state of the ABS warning indicator. |
ABS Pump Motor | -- | Off | The scan tool displays On or Off. The scan tool displays On when the ABS pump motor is commanded on. |
ABS Relay Command | -- | On | The scan tool displays On or Off. The scan tool displays the commanded state of the ABS system relay. |
Accum. Pressure Sensor | -- | Varies | The scan tool displays MPa or PSI. The scan tool displays the amount of brake fluid pressure stored in the accumulator. |
Analog Steering Position Sensor | -- | Varies | The scan tool displays the analog steering position sensor signal in degrees. |
Battery Voltage | -- | Varies | This displays volts. The scan tool displays the approximate voltage supplied by the battery and charging system. |
Brake Fluid Level | -- | OK | The scan tool displays OK or Low. The scan tool displays Low if the brake fluid is Low or OK. |
Brake Switch Status | -- | Off | The scan tool displays On or Off. The current state of the brake switch. |
Delivered Torque PWM Duty Cycle | -- | 0% | The scan tool displays 0-100%. 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 ECM is delivering. Normal values are between 10 and 90 percent duty cycle. |
Digital Steering Position Sensor | -- | Varies | The scan tool displays the digital steering position sensor signal in degrees. |
Lateral Accelerometer Sensor Input | -- | 0 m/s ² (0 ft/s) | The scan tool displays the sidways acceleration of the vehicle in meters per second (m/s) or feet per second (ft/s). |
Longitudinal Accelerometer Sensor Signal | -- | 0 m/s ² (0 ft/s) | The scan tool displays the acceleration of the vehicle in meters per second (m/s) or feet per second (ft/s). |
Left Front Wheel Speed | -- | 0 km/h (0 mph) | This displays km/h (mph). This is the current speed of the left front wheel speed sensor. |
Left Rear Wheel Speed | -- | 0 km/h (0 mph) | This displays km/h (mph). This is the current speed of the left rear wheel speed sensor. |
LF Dump Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the left front dump valve solenoid is commanded on. |
LF Iso. Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the left front isolation valve solenoid is commanded on. |
LR Dump Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the left rear dump valve solenoid is commanded on. |
LR Iso. Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the left rear isolation valve solenoid is commanded on. |
Master Cylinder Pressure Sensor Input | -- | 0 kPa (0 PSI) | The scan tool displays the hydraulic brake pressure applied by the master cylinder in kPa or PSI. |
Requested Torque PWM Duty Cycle | -- | 0% | The scan tool displays 0-100%. 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. Normal values are between 10 and 90 percent duty cycle. |
Reverse Switch | -- | Off | The scan tool displays On or Off. The scan tool displays ON when the transmission gear selector is in reverse. |
RF Dump Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the right front dump valve solenoid is commanded on. |
RF Iso. Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the right front isolation valve solenoid is commanded on. |
Right Front Wheel Speed | -- | 0 km/h (0 mph) | This displays km/h (mph). This is the current speed of the right front wheel speed sensor. |
Right Rear Wheel Speed | -- | 0 km/h (0 mph) | This displays km/h (mph). This is the current speed of the right rear wheel speed sensor. |
RR Dump Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the right rear dump valve solenoid is commanded on. |
RR Iso. Valve Command | -- | Off | The scan tool displays On or Off. On is displayed when the right rear isolation valve solenoid is commanded on. |
Stability System Active | -- | No | The scan tool displays Yes or No. The scan tool displays the active status of the vehicle stability enhancement system (VSES). |
Stability System Enabled | -- | Yes | The scan tool displays Yes or No. The scan tool displays the operating status of the VSES. |
System Configuration | -- | Varies | The scan tool displays Invalid, Not Determined, Non-VSES Auto., Non-VSES Man., or VSES. The scan tool displays the current configuration of the EBCM. |
System Voltage | -- | Varies | The scan tool displays the approximate voltage supplied by the battery and charging system. |
TCS Status/EBTCM -- TCS Active | -- | No | The scan tool displays Yes or No. The scan tool displays Yes if the EBCM is requesting torque reduction from the PCM |
TCS Status/PCM -- TCS Active | -- | No | The scan tool displays Yes or No. The scan tool displays Yes if the PCM is reducing engine torque during a traction control event. |
Traction Control Equipped | -- | Yes | The scan tool displays Yes or No. The scan to displays if the vehicle is equipped with traction control. |
Traction Control Switch | -- | Enabled | The scan tool displays Invalid, Disabled, N/A, or Enabled. The scan tool displays the current status of the traction control switch as reported by the BCM. |
Transmission Type | -- | Varies | Invalid, Not Determined, Automatic, or Manual. The scan tool displays the current transmission type configuration. |
VSES Control Switch | -- | Enabled | The scan tool displays Invalid, Disabled, N/A, or Enbled. The scan tool displays if the enabled/disabled status of the VSES system requested by the BCM/traction switch. VSES can be disabled by use of the traction switch. |
VSES Equipped | -- | Varies | The scan tool displays Yes or No. The scan tool displays if the vehicle is equipped with VSES. |
Yaw Rate Sensor Input | -- | 0 m/s ² | The scan tool displays m/s ². The scan tool displays the amount of vehicle rotation (yaw rate) per second. |
4WD Status | -- | Varies | The scan tool displays if the vehicle is in 2 wheel drive or 4 wheel drive. |
Scan Tool Output Control | Description |
|---|---|
ABS Motor | This is used in order to command the ABS pump motor On or Off. |
Automated Bleed | This is used in order to bleed ABS hydraulics. Refer to Antilock Brake System Automated Bleed Procedure . |
Brake Pedal Stroke Test | Activates the solenoid regulator cut valve and the solenoid regulator apply valve. |
Evac and Fill | Activates the the release valves and solenoid traction valve. |
LF Inlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
LF Outlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
LR Inlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
LR Outlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
RF Inlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
RF Outlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
RR Inlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
RR Outlet Valve Solenoid | Commands the indicated solenoid ON and OFF. |
