9-3 (9440) V6-2.8L Turbo (2008)
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Diagram
Connection 5D
Switch
Pin 2 is ground from the rear electrical centre and pin 3 is supplied 10.2 V via an resistor of 680 Ohms integrated in BCM. The voltage measured across
the pins will be approximately 4.1 V when the switch is closed and approximately 7.4 V when open. If the control module reads 10.2 V or 0 V it will
interpret such as an error in the circuit.
In order to save current when the car is not driven BCM will pulse the voltage to the switch for 2.5 ms at 375 ms intervals as soon as the car's bus
communication stops.
