| Table 1: | Electronic Brake Control Scan Tool Parameters |
| Table 2: | Electronic Brake Control Scan Tool Output Controls |
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Operating Conditions: ON, Engine OFF and Brake released | |||
4WD Status | -- | Varies | The scan tool displays Two wheel drive/Four wheel drive. The scan tool displays Two wheel drive when the transfer case is shifted into two wheel drive. |
ABS Lamp Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the ABS indicator is commanded on. |
ABS Pump Motor | -- | Off | The scan tool displays On/Off. The scan tool displays On when the ABS pump motor is commanded on. |
ABS Relay Command | -- | On | The scan tool displays On/Off. The scan tool displays On when the system relay is commanded on. |
ABS Stop State | -- | Off | The scan tool displays On/Off. The scan tool displays On when the ABS is active. |
Analog Steering Wheel Position Input | -- | The scan tool displays the analog steering wheel position input in degrees. | |
Brake Switch Status | -- | Off | The scan tool displays On/Off. The scan tool displays On when the brake is applied. |
Brake Warning Lamp Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the red brake warning indicator is commanded on. |
Delivered Torque | -- | 35% | The scan tool displays 25-95%. The scan tool displays 25% when the PCM provides the minimum percentage of available torque in an attempt to eliminate wheel slip. |
Diff. Pressure/Fluid Level Switch | -- | OK | The scan tool displays OK/Low. The scan tool displays OK when the brake fluid reservoir has an adequate fluid level. |
Digital SWPS Phase A | -- | Varies | The scan tool displays High or Low. This is the state of the digital SWPS phase A pulse. Everytime the steering wheel turns, it toggles between high and low. |
Digital SWPS Phase B | -- | Varies | The scan tool displays High or Low. This is the state of the digital SWPS phase B pulse. Everytime the steering wheel turns it toggles between high and low. |
Lateral Accelerometer Sensor Signal | -- | 2.5 Volts | The scan tool displays 0-5 Volts. The Scan tool displays 2.5 Volts when lateral acceleration is 0 g. |
Left Front Wheel Speed | -- | 5 km/h 3 mph | The scan tool displays 5-257 km/h (3-160 mph). The scan tool displays 5 km/h (3 mph) when the vehicle is not moving or is moving at speeds less than or equal to 5 km/h (3 mph). |
Left Rear Wheel Speed | -- | 5 km/h 3 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/Off. The scan tool displays On when the left front dump valve solenoid is commanded on. |
LF Iso. Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the left front isolation valve solenoid is energized. |
Longitudinal Accelerometer Sensor Signal | -- | 2.5 Volts | The scan tool displays 0-5 Volts. The Scan tool displays 2.5 Volts when lateral acceleration is 0 g. |
LR Dump Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the left rear dump valve solenoid is energized. |
LR Iso. Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the left rear isolation valve solenoid is commanded on. |
Master Cylinder Pressure Sensor Input | -- | 0 kPa/psi | The scan tool displays 0-13,800 kPa (0-2000 psi). The scan tool displays 0 kPa (0 psi) when the brake is released. |
Master Cylinder Pressure Sensor Input | -- | 2.5 Volts | The scan tool displays 0-5 Volts. |
Requested Torque | -- | 91% | The scan tool displays 40-95%. The scan tool displays 40% when the EBCM requests the minimum percentage of available torque in an attempt to eliminate wheel slip. |
Right Front Wheel Speed Sensor | -- | 5 km/h 3 mph | The scan tool displays 5-257 km/h (3-160 mph). The scan tool displays 5 km/h (3 mph) when the vehicle is not moving or moving at speeds less than or equal to 5 km/h (3 mph). |
Right Rear Wheel Speed Sensor | -- | 5 km/h 3 mph | This displays km/h (mph). This is the current speed of the right front wheel speed sensor. |
RF Dump Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the right front isolation valve solenoid is commanded on. |
RF Iso. Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the right front isolation valve solenoid is energized. |
RR Dump Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the right rear dump valve solenoid is commanded on. |
RR Iso. Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the right rear isolation valve solenoid is commanded on. |
Stability System Active | -- | No | The scan tool displays Yes/No. The scan tool displays Yes when the VSES is active. |
Stability System Enabled | -- | Varies | The scan tool displays Yes/No. The scan tool displays Yes when the VSES is initialized and no VSES related DTCs are set. |
Steering Wheel Position | -- | Varies | This displays degrees. This is the signal received from the steering angle sensor. |
System Voltage | -- | 12 Volts | The scan tool displays 9.0-17.5 Volts. The scan tool displays the current battery positive voltage level at the EBCM. |
TCS Iso. Valve Command | -- | Off | The scan tool displays On/Off. The scan tool displays On when the traction control isolation valve solenoid is commanded on. |
Traction Control Active | -- | No | The scan tool displays Yes/No. The scan tool displays Yes when the traction control system is active. |
Traction Control Enabled | -- | Varies | The scan tool displays Yes/No. The scan tool displays Yes when the traction control system is enabled. |
Traction Control Equipped | -- | Yes | The scan tool displays Yes/No. The scan tool displays Yes when the vehicle is equipped with traction control. |
Traction Control Slip | -- | No | The scan tool displays Yes/No. The scan tool displays Yes when the rear wheel slip occurs during acceleration. |
VSES Equipped | -- | Yes | The scan tool displays Yes or No. Yes is displayed when the vehicle stability enhancement system is equipped. |
VSES Relay Command | -- | On | The scan tool displays On/Off. The scan tool displays On when the VSES relay is commanded on. |
Yaw Rate Sensor Input | -- | 2.5 Volts | The scan tool displays 0-5 Volts. The Scan tool displays 2.5 Volts when yaw rate is 0 deg/sec. |
Output Control | Description |
|---|---|
ABS Motor | This is used in order to command the ABS pump motor On or Off. |
Automated System Bleed | This is used in order to bleed ABS hydraulics. Refer to Antilock Brake System Automated Bleed Procedure . |
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. |
Tire Size Calibration | Important: The powertrain control module (PCM) must also be programmed with the correct tire size calibration when different size tires are installed on the vehicle. Refer to Service Programming System (SPS) . This function allows the technician to read the tire size calibration of the EBCM or calibrate the EBCM to the correct tire size. Calibration must be performed when the EBCM is replaced or when different size tires are installed on the vehicle. |
Yaw Rate Sensor Recalibration | This output control is used to recalibrate the yaw rate sensor. |
