How HPS (or EPS) Hydraulic Power Steering Works
Also known as hydraulic power steering (HPS) because most power steering systems (EPS) work with hydraulic oil. Most Japanese cars are called EPS, but European cars are called HPS. There are three main types of HPS system. steering ECU and HPS motor; Torque sensor. The rest is the steering wheel. It will include mechanical components such as the steering column and steering gear.
The HPS system in hybrid cars is slightly different from regular cars. For example, more CAN lines. The steering ECU is usually the Main ECU; ABS ECU; The body ECU and combination meter are connected to the CAN data. Hybrid vehicles also have a hybrid vehicle control ECU with a CAN. If the HPS system is not normal, the car may be heavier than normal. There are also problems with ABS lines. The torque sensor design differs from hybrid cars to conventional cars. Most conventional cars use a resiator type torque sensor. Some high-end cars from 2014 onwards have a coil type torque sensor.
It doesn’t matter if you change the steering wheel or not. The torque sensor needs to be zero point calibrated whether the motor is replaced or not. If you have a diagonsis scan, you can do it easily. Otherwise, the steering wheel is abnormal and one-sided. You may find that it works automatically. Completing zero point calibration requires some time. Do exactly what the scan tool tells you to do. You can make a mistake at least 3 times and more than that, the steering lock will be locked. The torque sensor must also be in place.
Fault finding (if the steering wheel is heavy)
1. Check the front tires for wear and tear.
2. You need to check if you are right.
3. Check the ball joints.
4. Steering gear You need to check the columns for good or bad.
5. Steering motor. Steering ECU
6. Check the battery.