ABS Warning Light Remains ON: Description

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU is connected to the combination meter via CAN and multiplex communications.

If any of the following is detected, the ABS warning light remains on.

The skid control ECU connectors are disconnected from the skid control ECU.
There is a malfunction in the skid control ECU internal circuit.
There is an open in the harness between the combination meter and the skid control ECU.

HINT:

In some cases, the intelligent tester cannot be used when the skid control ECU is abnormal.