Intake air temperature sensor: check, device


Based on the principles of organizing its work, a car engine has long turned into a computerized installation. There is a central processor with various types of memory and developed peripherals with sensors and actuators. One source of incoming information is the intake air temperature sensor (IAT). It plays a significant role in optimizing combustion in the cylinders.

Purpose and location

The temperature sensor is designed to monitor the temperature of air coming from the environment. Depending on the air temperature, the state of the air-fuel mixture and its flash point in the cylinder changes. If the air on the street cools or heats up excessively, the vehicle's driving behavior may differ significantly. The sensor reacts to temperature changes and sends a signal to the control unit to change the current operating parameters.

Therefore, the direct function of the intake air temperature sensor is to measure current parameters. Indirectly, it is designed to increase or decrease the volume of the supplied fuel mixture in accordance with external factors.

This temperature sensor is installed in the vehicle's air supply system. As a rule, it is located in close proximity to the air filter or on its housing; in some models it may be located in the intake manifold.


Rice. 1. Air sensor installation location

The location method involves directing the sensitive element into the air stream. Therefore, the installation location must provide for clear fixation, since if the sensor moves in the mounting hole, you will get unclear readings.

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Comments 24

This sensor (THA), judging by the smart books, is “additional” (but not the main one), based on the manuals, it affects consumption mainly during highway driving. in fact, if the THW (DTOZH) is faulty or disabled, the engine will still stall on a cold car, so its readings are screwed!

There is no dullness, neither when it’s cold, nor when it’s warm... When I change the thermostat, I’ll remove the RAIN AND PROTEST in one go. There are also plans to replace the lambda.

be careful with the trick there, if anything happens

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