A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
NOTE: Ground (GND) from the ECM is present at terminal 3 of connector
If specified value is not obtained:
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Check wire connections.
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Connect multimeter to terminal 3 and terminal 4 of connector for voltage measurement.
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Specification: about 5 V
If specified value is not obtained:
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Check wire connections.
Check wire connections for Mass Air Flow (MAF) sensor
NOTE: Signal wire is also checked during wire test.
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Connect VAG1598/31 test box at wiring harness to Engine Control Module (ECM), do not connect ECM. Refer to "Scan Tool Testing/Wiring and
Component Testing Using VAG1598/31 Test Box", See: Computers and Control Systems/Testing and Inspection
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Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector
VAG1598/31 test box
Terminal
Socket
3
27
4
53
5
29
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Repair open circuit or short circuit if necessary.
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Also check all wires for short circuit to each other.
If wire connection is OK: