What Causes Excessive Voltage in the Intake Air Temperature Sensor Circuit?
1 Answers
Intake air temperature sensor circuit voltage may be too high due to poor contact between the ECU end and the connector end, or abnormal grounding of the intake air temperature sensor. The specific causes are as follows: Poor contact between the ECU end and the connector end: Unplug the intake air temperature sensor connector and measure whether the power supply voltage at the sensor connector is 5V. If it is lower than 5V, check for poor contact between the ECU end and the connector end, which may cause voltage division. Abnormal grounding of the intake air temperature sensor: Measure whether the grounding of the intake air temperature sensor is normal. Poor grounding can also divert part of the sensor's voltage, resulting in a false signal of low voltage and high intake air temperature.