ESP_a021_WSSGeneralVDiffFault

Description

Wheel Speed Sensor: General Fault.

Condition

If the difference between maximum and minimum wheel speed related to a reference speed exceeds 5%. A generic wheel speed sensor fault is set if no wheel specific fault could be determined. During system mode ABS and backup-EBD (Electr. Brake Force Distribution) and below 20 kilometers per hour the deviation is 6 kilometers per hour for velocities < 100 kilometers per hour and 6% for a velocity > 100 kilometers per hour.

Clear Condition

1.) Open circuit in the WSS line 2.) Short circuit to + voltage in the WSS line 3.) Short circuit to GND in WSS line 4.) WSS dislodging from bracket 5.) Input amplifier in ECU faulty 6.) tooth wheel missing 7.) WSS not installed 8.) too great airgap 9.) incorrect tooth count

Potential Impact

Will disable VDC/TC and degrade ABS

Customer Facing Message 1

ABS (anti-lock braking system) disabled

Customer Facing Message 2

Drive with caution

Audiences

customer;service-fix

Models

Cybertruck;Model 3 2017-2023;Model 3 2024+;Model S 2021+;Model X 2021+;Model Y;Model Y 2025+