INJECTION - IGNITION
9
Throttle position sensor
The TPS (1) is powered by the ECU to which it sends a signal indicating the throttle position. This
information is an indirect measure of the engine load and is used by the ECU as one of the main
parameters for defining the fuel flow rate and spark advance.
NOTES
It is not possible to change the throttle position sensor as a single component. In the event of a
fault with this component, it will be necessary to replace the entire throttle body assembly and
perform the TPS reset.
R.p.m. / timing sensor
This sensor (2) is of the inductive type: it faces the timing gear and is capable of reading the
46 teeth and the 2 -tooth gap.
The signal coming from the pickup on the camshaft gear is used by the ECU to determine the
engine speed and as a timing reference point.
Sub 9-12
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