Aspirated air temperature sensor operation check

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Petrol injection system › Aspirated air temperature sensor operation check

EngineAspirated air temperature sensor operation check

ASPIRATED AIR TEMPERATURE SENSOR OPERATION CHECK

Check 1056BU

1.2 8v, 1.4 16v

STEP	CHECK TO BE PERFORMED	REMEDIAL ACTION IF THE CHECK IS NOT OK
1	Air temperature sensor check Disconnect the pressure sensor connector Connect an ohmmeter between pins 1 and 2 and check that the resistance value is similar to the attached graph	Replace the sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R.
2	Power supply check Connect a voltmeter between pins 1 and 3 of the sensor wiring Turn the ignition to MAR and check for a voltage of approximately 5 Volts	Restore the wiring between the sensor and the engine management control unit
3	Pressure signal check Connect a voltmeter between pins 3 and 4 of the sensor wiring. With the engine idling, check for a voltage of approximately 3.5 volts. Accelerate and check that the voltage value is similar to the attached graph	Replace the sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R.

STEP

CHECK TO BE PERFORMED

REMEDIAL ACTION IF THE CHECK IS NOT OK

Air temperature sensor check

Disconnect the pressure sensor connector

Connect an ohmmeter between pins 1 and 2 and check that the resistance value is similar to the attached graph

Replace the sensor

Power supply check

Connect a voltmeter between pins 1 and 3 of the sensor wiring

Turn the ignition to MAR and check for a voltage of approximately 5 Volts

Restore the wiring between the sensor and the engine management control unit