2.4 Air Temperature Sensor (ATS)
The air temperature sensor is used to give the ECU information on the temperature of the inlet air. This
allows corrections to the ignition timing to suit varying conditions.
This sensor is optional as this control is only required on engines that see large temperature changes,
typically only forced induction engines.
The air temperature should be measured as close to the inlet as possible, preferably in the inlet airbox,
the back of the airfilter, or with forced induction engines, in the inlet plenum. Heat-soak into the body of
the air temperature sensor needs to be minimised so it is preferable when installing the sensor into an
inlet plenum to install it onto a non-metallic section of the inlet. If this is not possible, then a pipe just
before the throttle plate that is insulated from the direct conduction of engine temperature can be used.
The two wires can go onto the sensor either way round.
OMEM200 Installation Manual 2v10
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