9.1 Located the IAT type sensor on vehicle.
9.3 Turn the ignition "ON" , but do not start the engine.
9.4 Record the reading from the meter: 12.69 V If you do not get a reading on the meter, you may have to check for a good connection, try different wires until you get a good reading to record above.
9.5 Is the reading more or less than the reading you had the ECT? more
Does this show the IAT sensor is colder or hotter than the ECTsensor? Colder.
IAT sensor works exactly the same way as ECT to measure the temperature of air , when it is cold the engine will need more oxygen as there is more fuel spraying
9.7 Describe how the IAT reading affects for outputs for fuel injection. include how an incorrect input could affect the fuel injection an engine :
It is directly related if the engine is cold it will send signal that more oxygen is needed to be sprayed, if it gives wrong input signal, the engine will have wrong fuel - air ratio, and the engine will run rough.
9.8 Describe how the ITA sensor signal should change for different air temperature conditions.
Different air temperature will change the IAT sensor signal of higher temperature, and the voltage drop will be low and low temperature the IAT sensor will send high voltage signal or vise verse.
9.9 Describe what could go wrong to create an incorrect IAT signal for the ECU.
Poor connection, bad earth, or faulty IAT component.
9.10 Draw the wiring digram for the IAT sensor for this vehicle .
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