Jetta GLX V6-2.8L (AFP) (2002)
Intake Air Temperature Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Intake Air Temperature Sensor -G42- Checking
NOTE: The Intake Air Temperature (IAT) sensor -G42- is a part of the Mass Air Flow (MAF) sensor -G70- and cannot be replaced separately.
Special tools and equipment
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VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
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VAG 1598/31 test box
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Multimeter (Fluke 83 or equivalent)
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VW1594 adapter set
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Wiring diagram
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VAG1921 hose clip pliers
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Chilling spray (commercially available)
Test sequence
NOTE: Only gold plated contacts must be used to repair The contacts in the intake air temperature sensor.
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Connect VAG1551 (VAG1552) Scan Tool (ST).
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Switch ignition on and press buttons -0- and - 1- to insert "Engine Electronics" address word 01.
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
Input display group number XXX
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Press buttons -0-, -0- and -4- to input display group number 4 (004) and press -Q- button to confirm input.
Indicated on display: (1-4 = display fields)
Read Measuring Value Block 4
->
1
2
3
4
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Read intake air temperature value in display field 4.