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od mbole » četvrtak, 18. dec. 2014. u 04:17h
Ima, i vezan je sa svim i svacim, od PCM-a do traction control modula, senzora brzine, releja ventilatora motora...
Adaptive Damping (15)
Circuit description
The Adaptive Damping System (ADS) is an electronically-controlled suspension system which improves driving comfort and vehicle handling. The adaptive damping module (A34) automatically selects the most suitable shock absorber setting (firm or soft) based on the steering angle and rate, road conditions, deceleration, acceleration, vertical acceleration of vehicle body, vehicle speed and the firm ride switch (N107) setting.
With the ignition in run, voltage is applied to pins 1B and 15B of the adaptive damping module (A34).
Inputs from Sensors
The steering position sensor (B36) sends signals to pins 18B and 19B of the adaptive damping module (A34). From these signals, the module can determine the direction of steering movement, the steering angle and the steering rate. The shock absorbers are set to firm for fast driving in bends and during fast steering wheel movements.
The vertical acceleration sensor is integrated in the adaptive damping module (A34). Above a certain vertical acceleration, the shock absorbers are set to firm.
The vehicle speed sensor (B11) sends a square wave signal, whose frequency is proportional to the vehicle road speed, to pin 7B of the adaptive damping module (A34).
Other Inputs
The brake applied signal from the stop lamp switch (N15) is an input to pin 3B of the adaptive damping module (A34). When the brakes are applied, the shock absorbers are immediately set to firm for 0.5 seconds. If the deceleration continues, the shock absorbers remain set in firm.
The electronic engine control (EEC) module (A15) sends an acceleration signal to pin 20B of the adaptive damping module (A34). During acceleration, the shock absorbers are set to firm.
The firm ride switch (N107) allows the driver to select between either "automatic" or "sport" modes. In the "automatic" position, the control module decides when the shock absorbers should be set soft or firm. In the "sport" position, the shock absorbers are constantly set to firm. When the sport mode is selected, the indicator lamp inside the switch illuminates. The firm ride switch (N107) sends a signal to pin 5B of the adaptive damping module (A34).
The ABS/Traction control signal is sent to pin 17B of the adaptive damping module (A34) to notify the module that traction control is activated.
Adjusting the Shock Absorbers
The shock absorbers are adjusted by solenoid valves (Y39, Y40, Y41 and Y42) which are connected to pins 12A, 14A, 22A, 23A, 24A, 25A and 26A of the adaptive damping module (A34). Each solenoid valve opens and closes an oil bypass which makes the shock absorber softer or firmer than the standard damping setting. It takes the shock absorbers less than 20 milliseconds to change from soft to firm.
Troubleshooting System
A troubleshooting system is integrated in the adaptive damping module (A34) which checks all the components for any electrical or electronic defects. If a defect is found, the corresponding defect code is stored, the shock absorbers are switched to firm, and the warning indicator in the instrument cluster (A30), connected to pin 11A of the module, is illuminated. Pin 7 of the data link connector (DLC) (D20) is connected to pin 9A of the adaptive damping module (A34).
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