Normal Operation and Fault Conditions

WARNING: This page is about a different car, the 2020 Lincoln Continental, 2019 Lincoln Continental, and 2018 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.

The ABS module receives BPP switch input from the PCM through the GWM over the HS-CAN. The ABS module compares this information against wheel speed sensor input to determine if the BPP switch input is valid. As vehicle speed decreases, the ABS module looks for a change in the BPP switch input, if vehicle speed decreases but there is no change in the BPP switch, the ABS module sets a DTC. An incorrectly installed BPP switch can cause a signal plausibility concern. An implausible signal can also be created if a driver is resting one foot on the brake pedal while using the other foot to press the accelerator.

PPT AC ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
C0040:64	Brake Pedal Switch "A": Signal Plausibility Failure	Sets in continuous memory when the ABS module detects the HCU pressure signal exceeds 15 bar and the stoplamp switch signal is inactive for longer than 1 second.
C0044:28	Brake Pressure Sensor "A": Signal Bias Level Out of Range/Zero Adjustment	The ABS module calculates a signal offset for the pressure sensor in the HCU. When the ignition is set to ON, the ABS module begins calculates a new offset and compares this one to the offset stored in memory. If the newly calculated offset and the stored offset do not match, this DTC sets in continuous memory.