9-5 Sport Wagon (9600) V6-3.0L Turbo (B308) (2003)
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The pressure sensor consists of a membrane and a piezoelectric crystal.
Function
When the driver depresses the brake pedal, the brake fluid is forced into the pressure duct (1). The steel membrane (2) is depressed and acts on a
piezoelectric unit (3). The distribution of charge in the piezoelectric unit thus changes. This signal is amplified in the electric circuit (4) and sent to the
ESP system.
Diagnostics
In the event of a faulty signal from the pressure sensor, a short circuit or open circuit a DTC is generated in the ESP control module. The following
