Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Air Flow Meter/Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Mass Air Flow (MAF) sensor, checking
Special tools and equipment
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V.A.G 1551 Scan Tool (or VAG 1552 mobile scan tool) with VAG 1551/3 cable
-
VAG 1598/31 test box
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VAG 1526 multimeter or VAG 1715 multimeter
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VAG 1594 connector test kit
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Wiring diagram
Test requirements
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Fuse no.34 must be OK.
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Coolant temperature must be at least 80 °C, See Display group 04, display field 3
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All electrical consumers like, for example, lights and rear window heating must be switched off.
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If vehicle is equipped with an A/C system, it must be switched off.
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For vehicles with automatic transmission, selector lever must be in -P- or -N-.
Test sequence
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Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select the Engine Control Module (ECM) using address word 01. 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
Rapid data transfer
HELP
Select function XX
-
Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
-
Press 0, 0 and 2 for function "display group number 2", and then press Q to exit from input mode.
Indicated on display (1 - 4 = display fields)
Read Measuring Value Block 2
->
1
2
3
4
-
Check mass flow of air into engine in display field 4