Outline
A column assist type EPS has been adopted for all models.
EPS provides smooth handling from low to high speeds as a result of the excellent steering feel provided by the electronic control and the vehicle-speed responsive control.
EPS does not require a power steering oil pump and generates assist force only when the steering wheel is steered. As a result, engine load is lowered and fuel efficiency is improved.
Serviceability improved by the automatic configuration function and the steering angle neutral position auto-learning function.
Structural View
System Wiring Diagram
Purpose/Function
The EPS assists the manual steering mechanism operation using the EPS motor to provide supplemental manual power during steering operation, reducing the load on the driver.
Construction
The EPS consists of the following parts:
Manual steering mechanism
Consists of the steering wheel, steering column, steering column and shaft, steering gear and linkage.
Electric assist mechanism
Consists of the EPS CM (control module) built in the steering column, torque sensor, reduction gear, and EPS motor integrated in the EPS CM.
Control system
Controls based on the EPS CM, torque sensor, reduction gear, EPS motor, and vehicle speed and engine speed signals input from the PCM.
Operation
1. Steering force generated by the driver's steering wheel operation is detected by the torque sensor which is built in the steering column and shaft, and is output to the EPS CM as a steering torque signal.
2. The EPS CM calculates optimum assist force based on the steering torque signal from the torque sensor and the vehicle speed and engine speed signals from the PCM, and outputs electric current to drive the EPS motor.
3. The EPS motor is driven by the current from the EPS CM and the force is transmitted to the intermediate shaft via the reduction gears, thus assisting steering operation of the driver.
Engine Oil Control
Outline
The PCM reduces the oil pump load applied to the engine by controlling the
appropriate engine hydraulic pressure according to the engine operation conditions.
The engine hydraulic pressure switches in two steps. When hydraulic pressure
is not needed, the oil pump dischar ...
Fuel Line Pressure Inspection
WARNING:
Fuel line spills and leakage from the pressurized fuel system are dangerous.
Fuel can ignite and cause serious injury or death and damage. To prevent this,
complete the following inspection with the engine stopped.
Fuel is very flammable liquid. If fuel spills or leaks ...
Differential Oil Temperature Sensor
Purpose, Function
The differential oil temperature sensor detects the rear differential oil
temperature based on the resistance of the thermistor, and inputs it to the
AWD CM.
Construction
The differential oil temperature sensor is installed in the rear differential
carr ...