A4 Sedan L4-1.8L Turbo (AWM) (2001)
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Specification: approx. battery voltage
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 (MF) 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/Wire and
Component Testing Using VAG1598/31 Test Box" See: Computers and Control Systems/Testing and Inspection
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Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
