PS Warning Light Remains ON: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The power steering ECU assembly is connected to the combination meter via CAN and multiplex communications. If any of the following is detected, the P/S warning light remains on
- The power steering ECU assembly connectors are disconnected from the power steering ECU assembly
- There is a malfunction in the power steering ECU assembly internal circuit
- There is an open in the harness between the combination meter and power steering ECU assembly
When a voltage source drop is occurred in a system, the warning light comes on to inform the driver of the problem