What does AFS mean in a Toyota Crown?

The ABS, short for anti-lock braking system, is a safety feature in Toyota Crown which prevents the wheels from locking up during braking. This makes it possible to maintain steerability and directional stability even when braking hard, allowing the driver to avoid obstacles. If the ABS light illuminates in the instrument cluster of Crown, it means the anti-lock braking system has malfunctioned.

The ABS light comes on in the dashboard of Toyota Crown when one or more of the wheel speed sensors have malfunctioned, brake fluid is too low, the fuse is blown or the relay is bad, tire pressure is low, or if the ABS module has developed a defect.

When the ABS light

1. Bad wheel speed sensor

Toyota Crown has an ABS sensor at each wheel hub which measures the speed of the respective wheel and transmits the information to the ABS control unit. If a sensor develops a defect and sends inaccurate or no speed information, the ABS light illuminates in the instrument cluster.

Bad wheel speed sensor is one of the leading causes of ABS warning light in Crown, as they are exposed to harsh conditions due to their close proximity to the wheels.

How to check ABS sensor

It isn’t usually possible to identify the faulty ABS sensor in Crown by physical inspection. The only most reliable method of diagnosing an ABS speed sensor is by connecting an OBDII scanner to your vehicle and reading out the error codes. The error code also makes it easy to determine which sensor is affected. The faulty sensor must be replaced to resolve the issue.

Note: Make sure the code reader you are using can read your vehicle’s ABS codes. Not all readers can.