Alerts

The IDB detects a condition that precludes standstill skid detection function. This alert may be accompanied by causal hardware alerts (MicroController Unit [MCU], ASIC, wheel speed sensor) or signal alerts (Intertial Measurement Unit [IMU] measurement).

The IDB may not be unable to monitor for vehicle motion while all four wheels are stationary. Vehicle hold may not automatically release if the vehicle skids.

The IDB has determined the brake torque request DI_brakeTorqueCommand to be invalid or has an internal issue that prevents it from generating brake torque in response to DI_brakeTorqueCommand. This alert may be accompanied by causal hardware alerts (MicroController Unit [MCU], ASIC, solenoid valve, pump, wheel speed sensor, hydraulics) or signal alerts (Intertial Measurement Unit [IMU] measurement, External Brake Request [EBR] interface signals).

The IDB may not respond to brake torque requested in DI_brakeTorqueCommand.

The IDB detects a condition that precludes VDC function. This alert may be accompanied by causal hardware alerts (MicroController Unit [MCU], ASIC, solenoid valve, pump, wheel speed sensor, hydraulics) or signal alerts (VDC interface signals).

The IDB may not respond to DI commands to build brake torque to control vehicle dynamics or wheel spin. The vehicle should be driven with extreme caution.

The IDB detects a condition that precludes EBD function. This alert may be accompanied by causal hardware alerts (MicroController Unit [MCU], ASIC, solenoid valve, wheel speed sensor).

The IDB may not dynamically adjust brake distribution. The vehicle should be driven with extreme caution.

The IDB detects a condition that precludes ABS function. This alert may be accompanied by causal hardware alerts (MicroController Unit [MCU], ASIC, solenoid valve, pump, wheel speed sensor, hydraulics) or signal alerts (Intertial Measurement Unit [IMU] measurement).

The IDB may not modulate brake torque to mitigate wheel lock. The vehicle should be driven with extreme caution.

TThe IDB receives a valid CDP request via the EPBL_cdpRequest Controller Area Network (CAN) signal.

The IDB is generating brake pressure in response to a CDP request.

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The IDB has activated HFC.

The Integrated Dynamic Brake (IDB) is increasing actuated brake torque to compensate for brake fade due to high brake temperatures.

The IDB has activated PBA.

The Integrated Dynamic Brake (IDB) is increasing actuated brake torque above the current request in response to a fast brake pedal application.

The IDB has begun actuating BTC requests.

The Integrated Dynamic Brake (IDB) is actuating an external request to build brake torque at one or more wheels to control wheel spin from motor torque.

The IDB has begun actuating VDC requests.

The Integrated Dynamic Brake (IDB) is actuating an external request to build brake torque at one or more wheels to control vehicle dynamics.

EBD control has activated.

The Integrated Dynamic Brake (IDB) is modulating brake torque to achieve a desired pressure distribution across all four wheels.

At least one wheel has entered ABS control.

The Integrated Dynamic Brake (IDB) is modulating brake torque to limit wheel lock.

The initial motor check is interrupted by a power supply hard undervoltage, where the IDB poewr supply voltage is less than 6.5V for 300 milliseconds.

There is no direct impact to IDB functionality. The motor initialization check is not completed.

No CAN traffic is received via the CHASSIS CAN bus (IDB connector pins 9, 10).

IDB diagnostics may not be available, and the IDB may not be able to communicate over CHASSIS bus.

No CAN traffic is received via the PARTY CAN bus (IDB connector pins 16, 17).

The IDB may not be able to communicate via the PARTY CAN bus. Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compensation (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. The vehicle should be driven with extreme caution.

The measured motor rotor position is not changing in response to applied currents, or measured brake pressure does not follow the target pressure.

Only Electronic Brake Distribution (EBD) may be available. The IDB enters fallback mode and relinquishes controlling status to the Redundant Control Unit (RCU). The RCU may assume controlling status and perform backup brake boost, but Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compenration (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. Increased braking effort may be necessary to achieve desired deceleration. The vehicle should be driven with extreme caution.

The walls of the IDB pump piston housing is not detected on power on.

Only Electronic Brake Distribution (EBD) may be available. The IDB enters fallback mode and relinquishes controlling status to the Redundant Control Unit (RCU). The RCU may assume controlling status and perform backup brake boost, but Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compenration (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. Increased braking effort may be necessary to achieve desired deceleration. The vehicle should be driven with extreme caution.

The IDB motor coil temperature is greater than 200 degrees Celsius.

Only Electronic Brake Distribution (EBD) may be available. The IDB enters fallback mode and relinquishes controlling status to the Redundant Control Unit (RCU). The RCU may assume controlling status and perform backup brake boost, but Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compenration (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. Increased braking effort may be necessary to achieve desired deceleration. The vehicle should be driven with extreme caution.