DTC 25

Operation

The barometric-pressure sensor functions to convert the barometric pressure to voltage, and to input that voltage (as signals) to the engine control module.

The engine control module, based upon those signals, then corrects the amount to fuel injection, etc.

The 5V power supply within the engine control module is supplied to the barometric-pressure sensor; it passes through the circuitry within the sensor, and is grounded at the engine control module.

The barometric-pressure sensor output voltage is sent to the engine control module in proportion to the barometric pressure (absolute pressure).


Troubleshooting Hints

Hint 1: If there is a malfunction of the barometric-pressure sensor, driveability ot the vehicle will became worse particularly at high altitude.

Hint 2: If, during high-speed driving, there is a noticeable sharp drop of the displayed pressure of the barometric-pressure sensor check for clogging of the air cleaner.






Inspection





Harness Inspection