Beetle L4-2.0L (AEG) (2000)
Mass Air Flow Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Mass Air Flow (MAF) sensor, checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool using VAG 1551/3 Adaptor cable
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VAG 1598/22 Test Box
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Fluke 83 multimeter
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VW 1594 Adaptor kit
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Wiring diagram
Requirements
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Fuse 43 must be OK.
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ALL electrical consumers switched OFF
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A/C switched OFF, if installed.
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Automatic Transmission Range selector lever in "P" or "N"
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Engine Coolant Temperature 85 °C minimum See Display group 04, Display field 3
Test sequence
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Connect VAG 1551/1552 Scan Tool. See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting
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Start engine and let idle.
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Press 0 and 1 buttons to select "Engine Electronics" address word 01.
Indicated on display (example only)
06A906018AB Motronic M5.9.2 HS V06 ->
Coding 00000
WSC 00000
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Press -> button.
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.
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Press Q button to enter input.
Indicated on display
Read measuring value block
Input Display group number XXX
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Press buttons 0, 0 and 2 for "Display group 2."