The electronic suspension control system includes the following main components:
- Suspension control unit.
- Three body vertical acceleration sensors.
- Two sensors for vertical acceleration of the front wheels.
- Four integrated damper actuators.
The suspension control unit controls damping parameters according to the following factors:
- Vehicle speed.
- Steering wheel position.
- Engine torque.
- Pressure in the brake system.
- Vertical acceleration of the body and front wheels.
The control unit evaluates the input data to control the dampers separately, providing improved ride comfort and a wider range of operating conditions.
Suspension control unit
The suspension control unit monitors suspension parameters and detects failures. The suspension control unit receives input data from the vertical acceleration sensors, which are directly connected to the unit, as well as to other vehicle systems via a data bus. The suspension control unit sends command signals of various levels to the drives of each individual shock absorber.
Vertical acceleration sensors
The suspension control module supplies 5 volts and a ground circuit to each of the five vertical acceleration sensors. Vertical acceleration sensors supply 0.5-4.5 V signals to the control unit.
Three vertical body acceleration sensors are installed at the front left and right, as well as at the rear. Two front wheel vertical acceleration sensors are mounted on suspension struts.
Shock absorber drives
Shock absorber actuators are built into them. The electronic suspension control system uses proportional valves located in the external bypass modules.
Adjustment is carried out in the current mode. The current consumption is 0-1.8 A. The actuators respond to command signals from the suspension control unit within milliseconds.
Driver information center messages
The electronic suspension control system does not have a fault warning indicator, but uses the driver information center display on the instrument panel to display messages when a fault is detected.
Servicing the Electronic Suspension Control System
The electronic suspension control unit has the ability to store current or saved trouble codes. Most faults in the electronic control system will be displayed in the form of corresponding messages on the instrument panel display for the entire period of the existence of the fault code.
The suspension control unit uses a diagnostic cycle when the ignition is switched on. Actions taken when a fault is detected will continue until the ignition is turned off, even if the fault is no longer present.
When a malfunction is eliminated, the code about it is stored in the system history.
After 41 consecutive diagnostic cycles when the ignition is turned on without a malfunction, the code is deleted from memory.
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