ABS Warning Light Remains ON: Description

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU is connected to the No. 1 meter ECU via CAN communication

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 No 1 meter ECU and the skid control ECU.

HINT:

In some cases, the Intelligent tester or Techstream cannot be used when the skid control ECU is abnormal