Test sequence

NOTE: The Intake Air Temperature (IAT) sensor -G42- is integrated in the Mass Air Flow (MAF) sensor -G70-.

Connect testing and information system VAS5051. See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS5051, CONNECTING AND SELECT FUNCTIONS . Select vehicle system "01 - Engine electronics" in selection. Engine must be running at idling speed.
Display on VAS5051:

Fig 1: Identifying VAS5051 Display - Checking Intake Air Temperature Sensor (1 Of 3)
Courtesy of AUDI OF AMERICA, INC.
Under -1- select diagnostic function "08 - Read measured value block".

Display on VAS5051:

Fig 2: Displaying On VAS5051 - Checking Intake Air Temperature Sensor (2 Of 3)

Courtesy of AUDI OF AMERICA, INC.

1 - Enter display group

Enter "004" for "display group number 004" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:

Fig 3: Display On VAS5051 - Checking Intake Air Temperature Sensor (3 Of 3)

Courtesy of AUDI OF AMERICA, INC.

DISPLAY GROUP 004: INTAKE AIR TEMPERATURE WITH ENGINE IDLING

Display zones

Display group 004: Intake air temperature with engine idling

Display

xxxx rpm

xx.x V

xxx.x °C

Display

Engine speed

Battery voltage

Coolant temperature

Intake air temperature

Range

-48.0 to 143.0 °C

Specif. value

xxxx rpm

12.0 to 15.0 V

80.0 to 110.0 °C

Between ambient temperature and up to 110 °C ⁽¹⁾

⁽¹⁾	If a temperature is displayed which deviates greatly from the ambient temperature of the sensor, check sensor and sensor wiring for terminal resistances and open circuit.