Possible Causes
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2021 Lincoln Corsair, 2021 Ford Transit-350 HD, 2021 Ford Transit-350, 2021 Ford Transit-250, and 2021 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
- Wheel speed sensor input concern
- Wheel speed sensor
- AL1: Check For Other ABS Module DTCs
- Clear the ABS DTCs.
- Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
- Ignition ON, engine OFF.
Carry out the ABS self-test.
- Are any wheel speed sensor DTCs present which are NOT shown in the DTC Fault Trigger Conditions table?
Yes No DIAGNOSE those DTCs first. REFER to the ABS Module DTC Chart. INSTALL a new wheel speed sensor for the one in question. REFER to the appropriate Removal and Installation procedure in the Anti-Lock Brake System (ABS) and Stability Control article.