9-5 SE Sedan (9600) V6-3.0L Turbo (B308) (1999)
Description Of Operation
P Bus and I Bus
A bus is understood to be the leads over which information is sent digitally and serially. Digital means that the voltage difference between the
leads has only two values, roughly 0 V and 5 V. The information is coded so that different combinations of 0 V and 5 V pulses have different
meanings.
Serial means that the information is sent in "packets" which are transmitted one after the other in rapid succession.
All the control modules in the Saab 9-5 are connected to the bus with the exception of ABS/ABS-TC and SRS.