Golf L4-1.8L Turbo (AWW) (2003)
Air Flow Meter/Sensor: Testing and Inspection
Mass Air Flow (MAF) Sensor, Checking
Special tools and equipment
-
VAG1551 scan tool or VAG1552 mobile scan tool with VAG1551/3B cable
-
VAG 1598/31 test box
-
VAG1526 hand multimeter or VAG1715 multimeter
-
VAG1594 adapter set
-
Wiring diagram
Check conditions
-
All fuses must be OK.
-
Coolant temperature must be at least 80 °C, display group 04, display zone 3.
-
All electrical consumers, e.g. lights and rear window heating must be switched off
-
If the vehicle is equipped with an air conditioner, this must be switched off.
-
On vehicles with automatic transmission selector lever in "P" or "N" position
Test sequence
-
Connect VAG1551 scan tool (VAG1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine must
be running at idling speed. (Connecting scan tool and selecting engine control module). Refer to "VAG1551 Scan Tool See: Computers and
Control Systems/Tools and Equipment
Indicated on display:
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.
Indicated on display:
Read measured value block
HELP
Input display group number XXX
-
Press keys 0, 0 and 2 for "Display group number 2" and confirm entry with Q key.
Indicated on display: (1 to 4 = Display zones)
Read measured value block 2
->
1
2
3
4
-
Check the air mass drawn in display zone 4
Specification: 2.0 to 4.5 g/s
If the specification is obtained but there is a malfunction regarding Mass Air Flow (MAF) sensor registered in the DTC memory: