4WD Indicator Light Remains ON: Description
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
The 4WD control ECU is connected to the combination meter via the CAN communication system.
If the 4WD control ECU stores any DTCs which are related to the active torque control 4WD system, the 4WD indicator light comes on in the combination meter.