Circuit Description
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The suspension damper solenoid is driven ON and OFF by the electronic suspension control (ESC) module. To activate the suspension damper solenoid it is initially subjected to full battery voltage for a short period of time. Once the suspension damper solenoid is pulled-in the supply voltage is pulse width modulated (PWM). The amount the suspension damper solenoid valve is activated is based on inputs from the driver Tow/Haul Switch, road inputs, position sensor inputs and the powertrain control module (PCM).