GTI V6-2.8L (BDF) (2002)
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Intake Air Temperature Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Intake Air Temperature (IAT) Sensor - G42-, Checking
NOTE: The Intake Air Temperature (IAT) sensor -G42- is a component part of the Mass Air Flow (MAF) sensor -G70- and cannot be replaced
individually.
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551 Scan tool (or VAG 1552) with VAG 1551/3 adapter cable
NOTE: All functions which could previously be performed with VAG 1551/1552 can also be performed with the VAS 5051.
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VAG 1526 Hand multimeter or VAG 1715 multimeter
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VAG 1594 Adapter set
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VAG 1598/31 test box
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VAS 5024 Assembly tool for spring-type clips
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Electrical Wiring Diagrams
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Chilling spray (commercially available)
Test prerequisites
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Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
Test sequence
NOTE: Only gold plated terminals may be used to service the terminals in the Intake Air Temperature (IAT) sensor.
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Connect VAG 1551 Scan tool (or VAG 1552). Then switch ignition on and select Motronic Engine Control Module (ECM) -J220- with the
"Address word" 01. ((VAG 1551 and Motronic Engine Control Module (ECM) -J220-, connecting and selecting).
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Manufacturer's Scan Tool/Connecting VAG 1551 Scan Tool
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- for function "Read measured value (data) block" and confirm entry with -Q- button.
Indicated on display:
Read measured value block
Input display group number XXX
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Press buttons -0-, -0- and -4- for "Display group number 4" and confirm entry with -Q- button.
Indicated on display: (1 to 4 = display zones)
Read measured value block 4
->
1
2
3
4
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Read intake air temperature value in display zone 4.
Specification: approx. ambient temperature
