What is the standard value of the intake air temperature sensor?
2 Answers
Under normal conditions, the resistance is approximately 2-3 kiloohms at 20°C and about 0.4-0.7 kiloohms at 80°C. Here is some relevant information about temperature sensors: 1. Introduction: A temperature sensor is a device that can sense temperature and convert it into an available output signal. Temperature sensors are the core components of temperature measurement instruments and come in a wide variety. 2. Classification: They can be divided into two main categories based on measurement method: contact and non-contact. According to the material of the sensor and the characteristics of electronic components, they can be classified into two types: thermal resistors and thermocouples. 3. Principle: Based on the principle of metal expansion, metals produce a corresponding extension when the ambient temperature changes. Therefore, the sensor can convert this response into a signal in different ways.
I've seen many car issues caused by the intake air temperature sensor. It's installed near the intake pipe and measures air temperature to help the ECU adjust fuel injection. The so-called standard values aren't fixed numbers - they vary by vehicle model. For example, in the model I checked the manual for, at around 25°C the sensor resistance is approximately 2kΩ to 3kΩ, corresponding to a voltage signal of 0.5V. But resistance changes with temperature: it can rise to 10kΩ when cold or drop to a few hundred Ω when hot. The key point is specifications differ across models like Japanese or American cars, so you must refer to the factory manual. A faulty sensor can cause high fuel consumption and rough idle. I recommend using an OBD tool during regular maintenance to check if temperature readings are reasonable - don't overlook this small component.
