Audi Workshop Service and Repair Manuals > A3 Mk1 > Power unit | Simos injection and ignition system (4-cylinder) | Ignition system, glow plug system | Checking ignition system | Checking intake air temperature sender G42

Test sequence

–	Connect vehicle diagnostic, testing and information system -VAS 5051- or fault reader -V.A.G 1551- and select engine electronics control unit by entering “address word ” 01. For this purpose, the ignition must be switched on.

Indicated on display:

–	Enter “08” for the function “Read measured value block” and confirm entry with the Q key.

Rapid data transfer            HELP

Select function XX

Indicated on display:

–	Enter “004” for “Display group number 004” and confirm entry with the Q key.

–	Check specified value for intake air temperature sender in display zone 4:

Reading measured value block                  Q

Enter display group number XXX

	Display zones
	1	2	3	4
Display Group 004: Intake air temperature with engine idling
Display	xxxx rpm	xx.x Volt	xxx.x °C	xxx.x °C
Readout	Engine speed	Battery voltage	Coolant temperature	Intake air temperature
Specification	xxxx rpm	12.0...15.0 V	80.0...110.0 °C	from ambient temperature to 80°C. If a temperature is displayed which deviates greatly from the ambient temperature of the sender, check sender and sender wiring for contact resistances and open circuit.
Note:				If 9 °C or 30 °C are indicated continuously, check the wiring connections → Chapter If approx. ambient temperature is indicated and a fault is stored in the fault memory with regard to -G42-, check the sender → Chapter

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