9-3 (9440) V6-2.8L Turbo (2008)
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The sensor transmits information on type pressure, temperature and direction of rotation to the control module, which in turn informs the driver is a type
has low pressure.
Type
The type pressure sensor is an integrated sensor with transmitter, battery and valve. It comprises a plastic housing, with an electronic unit, which is
joined to an aluminium housing with a valve. On the valve are a tapered seal and a crown nut, which is used to fit the valve into the corner of the wheel.
The sensor weighs approximately 38 g.
Engaging
The sensor houses a 3 V (500 mAh) lithium battery that is activated when speed exceeds 20 km/h. The battery is not replaceable.
Function
The pressure sensor measures tire pressure, temperature and direction of rotation. The temperature value is only used in certain markets. Each sensor has
a unique code which is transmitted with every information block. The sensors are fitted into special Saab rims. During normal operation, the sensor takes
a reading every 10 seconds and transmits a signal once every minute. If the pressure has dropped by more than 0.08 bar from the latest reading, a new
signal is transmitted after 10 seconds.
When battery voltage is low, the control module transmits a system fault message on the I-bus.
