A4 V6-3.0L (AVK) (2004)
Intake Air Temperature Sensor: Testing and Inspection
With Generic Scan Tool
Intake Air Temperature (IAT) Sensor -G42-, Checking
Recommended special tools and equipment
-
VAG1526A multimeter
-
VAG1594A connector test kit
-
VAG1598/31 test box
NOTE: Intake Air Temperature (IAT) Sensor -G42- is integrated in Mass Air Flow (MAF) Sensor -G70-.
Test requirements:
-
Fuses for engine electronics OK
-
Ignition switched off.
Checking function
-
Connect diagnostic tester. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Diagnostic Tester, Connecting
-
Start engine and let run at idle.
-
In diagnostic function "33 - OBD", select "Mode 1: Checking measuring values."
-
Select the desired measuring value "PID 15: Intake air temperature".
-
Specified value: approx. ambient temperature
NOTE: If a temperature is indicated which differs greatly from ambient temperature of sensor, check sensor and sensor wires for contact resistances and
open circuit.
If indications do not resemble description:
Checking wire connections