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What is the standard value of the intake air temperature sensor?

1 Answers

McFrancisco

07/25/25 11:47am

Under normal conditions, the resistance value is approximately 2-3 kiloohms at 20°C and about 0.4-0.7 kiloohms at 80°C. If the measurement results do not meet the specified requirements, the sensor should be replaced. When the intake air temperature sensor installed in the air flow sensor is damaged, the air flow sensor should be replaced. Below is relevant information about the sensor: 1. Check the power supply voltage. Remove the intake air temperature sensor wiring harness connector, turn on the ignition switch, and measure the power supply voltage of the intake air temperature sensor, which should be 5V. 2. Measure the input signal voltage. Set the ignition switch to the ON position, use the voltage range of a multimeter to measure the voltage between THA and E2 of the ECU in the diagram. This voltage should be within the range of 0.5～3.4V (at 20℃). If it is not within the specified range, further check whether the intake air temperature sensor connection circuit has poor contact or open/short circuit faults. 3. Check the resistance of the intake air temperature sensor wiring harness. Use the resistance range of a digital multimeter to measure the resistance between the sensor connector and the ECU connector terminals, i.e., the resistance between the sensor signal terminal, ground terminal, and the corresponding ECU terminals. If there is no continuity or the resistance value is greater than 1Ω, it indicates poor contact in the sensor connection circuit or connector, and further inspection is required.

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