The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Element). The speed sensor rotor, which consists of 48 sets of N and S poles that are arranged in a circle, is integrated with the inner race of the hub bearing.

(*1, *2):

Even after the trouble areas are repaired, the ABS warning light will not go off unless the following operations are performed:

Connect the intelligent tester to the DLC3.

Lexus IS250 IS220d GSE20 ALE20 BRAKE CONTROL

Whenever an ABS DTC is detected, the skid control ECU stores the current vehicle (sensor) state as Freeze Frame Data.

The skid control ECU stores the number of times (maximum: 31) the engine switch has been turned from off to on (IG) since the last time the ABS was activated.

Check the DTC.

If the skid control ECU detects a malfunction, the ABS warning, BRAKE warning, master caution indicator, and SLIP indicator lights will come on and the multi information display shows warning messages, in order to warn the driver.

The table below indicates which lights will come on when there is a malfunction in a particular function.

Check the battery voltage.

If there are no DTCs output and the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

Release the parking brake.