ABS Warning Light Remains ON [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on:
- The skid control ECU (brake booster with master cylinder assembly) connector is disconnected from the brake booster with master cylinder assembly.
- There is a malfunction in the skid control ECU (brake booster with master cylinder assembly) internal circuit.
- There is an open in the harness between the combination meter assembly and the skid control ECU (brake booster with master cylinder assembly).
- The ABS control system is defective.
HINT:
In some cases, the Techstream cannot be used when the skid control ECU (brake booster with master cylinder assembly) is malfunctioning.