Pinion Factor Procedure: Description

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The transmission output speed signal supplies distance pulses to the control module in order to provide the appropriate distance pulses for the other vehicle systems. The pinion factor is programmed into the control module at the assembly plant.

The nature of the electronic pinion factor requires that certain features must be taken into consideration.

If no pinion factor is stored in an installed control module, the vehicle speedometer will not operate, engine speed will be limited to 2300 RPM and catalyst damage may occur.
Selecting a wrong tire size will cause the speedometer to be inaccurate and will also cause any speed related features to operate improperly.