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Programming the speedometer

Programming the speedometer

The ABS or TC/ABS control module reads 29 pulses per wheel revolution. Depending on the size of the tyre and rim (physical circumference), one kilometre will correspond to a different number of pulses when the main instrument unit receives the value from ABS or TC/ABS. It is therefore possible to change how the main instrument unit interprets the total number of pulses per kilometre to correspond to the tyre size fitted on the car. this must be programmed so that the speedometer and the odometer give the driver the correct information. It is compulsory on several markets that the speedometer shows speeds between 0 and 10 km too high.

Note

If the speedometer is not programmed correctly, the speed displayed for the driver may be lower than the actual speed and SID will provide incorrect information concerning fuel quantity and arrival time.




The current tyre size is programmed using Tech 2. There are three possible types of tyre to choose from. Tyre type 1 has the largest circumference and tyre type 3 has the smallest.

If the speedometer is programmed for a certain type of tyre and new wheels with a larger circumference are fitted, the speed displayed by the speedometer will be too low.

Important

The car must be approved for fitting 17" wheels.



Available tyre types in Tech 2:

• Type 1

215/45 R17

• Type 2

205/50 R16

• Type 3

195/60 R15