GTI V6-2.8L (BDF) (2002)
Air Flow Meter/Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Mass Air Flow Sensor -G70-, Checking
NOTE: Only gold plated terminals may be used to service terminals in the Mass Air Flow (MAF) sensor connector.
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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Electrical Wiring Diagrams
Test prerequisites
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The fuses must be OK.
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The battery voltage must be at least 11.5 V.
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All electrical accessories, e.g. lights and rear window heating must be switched off.
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If the vehicle is equipped with air conditioning, it must be turned off.
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Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
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Fuel Pump (FP) -J17- must be OK., checking:
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Coolant temperature must be at least 85 degrees C, See display group 1, display zone 2.
Test sequence
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Connect VAG 1551 Scan tool (or VAG 1552) and select engine electronics control module with the "Address word" 01. When doing this the
engine must be running at idle speed: ((VAG 1551 and Motronic Engine Control Module (ECM) -J220-, connecting and selecting).
See: 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: