What is the Cause of Transmission Pressure Sensor Failure?
1 Answers
The following are the causes of transmission pressure sensor failure: 1. Open circuit conditions: open circuit in the bridge supply leads (power supply lines), open circuit in the output signal lines, and open circuit in the bridge circuit. 2. Power supply failure: The power supply providing voltage to the sensor is not functioning properly. When the power supply completely fails to provide its standard voltage, it is equivalent to the aforementioned open circuit in the power supply lines. Additionally, when the supply voltage is too low, the sensitivity of the sensor's feedback information decreases; conversely, when the supply voltage is too high, the current passing through the strain gauge may exceed its rated current, causing damage to the strain gauge (during transmission repairs, cases have been encountered where repeated pressure sensor failures were caused by excessively high ECU supply voltage).