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Home >> Saab >> 2003 >> 9-3 Vector, Automatic >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Control Module (Late; 9440) >> Technical Description >> Control module, ESP (671), including hydraulic unit >> Main use >> Notes
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Main use: Notes

The control module continually calculates wheel speed for all four wheels and regulates by applying the brakes or sending an engine torque limitation request if there is there is a difference between wheel speeds or any limit value is exceeded. The hydraulic unit provides brake pressure to the wheel brakes and holds or evacuates brake fluid as necessary with internal unit valves.