The power steering ECU receives vehicle speed signals from the skid control ECU via CAN communication. The power steering ECU provides appropriate assisting force in accordance with the vehicle speed signal.

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 POWER ASSIST SYSTEMS

Turn the engine switch off.

If a problem occurs in the power steering system, the power steering warning light in the combination meter comes on and power steering assist is stopped, locked at a particular point or decreased simultaneously to protect the system.

Turn the engine switch off.

Check the DLC3 ().

Measure the voltage and resistance according to the value(s) in the table below.

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 POWER ASSIST SYSTEMS

Confirm problem symptoms ().

Furthermore, without regard to whether or not the vehicle is being turned, if the power steering ECU cannot receive the steering angle signal, steering zero point memory, vehicle speed signal, VGRS relative angle signal or engine speed signal, the power steering warning light in the combination meter illuminates and the vehicle enters fail-safe mode. During fail-safe control, the resistance of the steering wheel increases drastically to inform the driver that the vehicle is in fail-safe mode.