A4 Quattro Wagon L4-1.8L Turbo (AWM) (2001)
Engine Speed Sensor: Testing and Inspection
Engine Speed Signal, Checking
Engine Speed Signal, Checking
Special Tools and Equipment
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VAG1526A
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VAG1527B
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VAG1594A
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VAG1598/31
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VAS5051 with VAG5051/1
NOTE: The engine speed signal is output at terminal 37 of the Engine Control Module (ECM). The signal is used, among other things, for RPM display
in the instrument cluster
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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: Testing and Inspection
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Check the following wire connection for open circuit and short circuit to Ground (GND) and
Test box
Instrument cluster