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Speed information for other systems

Several other systems in the car need to know the vehicle speed. The ESP control module transmits the information on wheel speed on the P-bus. This information is corrected in the main instrument unit with a factor dependent on the programmed tire size. The main instrument unit transmits information on the vehicle speed on the I-bus.

NOTE: In cars with a 2.2 l diesel engine, vehicle speed data is sent directly from the ESP control module (pin 40) to PSG 16 (pin 34).

Refer to BUS AND DIAGNOSTICS COMMUNICATION for more information on bus communication.

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