Advice: You can make sure that the temperature sensor is working properly by comparing its readings on the instrument panel with a household liquid thermometer. Temperature readings may be abnormal due to increased electrical resistance in the connection between the wiring connector contacts and the sensor terminals.
To complete the work you will need a multimeter.
Sequence of execution
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Remove the bumper grille (see "Front bumper - removal and installation").
3. Remove the sensor from the bracket.
4. Disconnect the wiring harness connector from the sensor and remove the sensor.
5. After turning on the ignition, measure the voltage at the terminals of the wiring harness connector block.
Recommendation. The voltage should be about 3.5 V. If voltage does not reach the connector, the power supply circuit or instrument panel is faulty. You can verify that the sensor is faulty by replacing it with a known good one.
6. Replace the faulty sensor with a similar one.
7. Install the sensor in reverse order.
8. After installation, check the operation of the ambient air temperature sensor using the readings of the liquid crystal display installed in the instrument panel (see "Instrument panel").