A4 Quattro Wagon V6-2.8L (AHA) (1998)
Air Flow Meter/Sensor: Testing and Inspection
Mass Air Flow (MAF) Sensor, Checking
Required special tools and test equipment
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VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable
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VAG1598/22 test box
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Multimeter US1119 (Fluke 83 or equivalent)
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VW1594 connector test kit
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Wiring diagram
Test requirements
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All electrical consumers switched off (coolant fan must not run during test).
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A/C must be switched off
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Fuse for MAF sensor OK
Test sequence
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Connect VAG1551 or VAG1552 scan tool and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at
idle). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551/1552 Scan Tool" See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
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
HELP
Input display group number XXX
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Press buttons -0-, -0- and -2- to input display group number 2 (002), and press -Q- button to confirm input.
Indicated on display (1-4 = display fields)
Read Measuring Value Block 2
->
1 2 3 4
-
Compare display with specified values for engine load (display fields 2 and 4):
Display Group 2