TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) Sensor -G28-, Testing
Engine speed (RPM) sensor -G28-, checking
NOTE:
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The signal is generated by the engine speed (RPM) sensor -G28- processed in the Engine Control Module (ECM) and directed to various parts of
the electronic system (e.g. control module for A/C or ABS / EDS) from terminal 37 of the ECM. Engine speed signal and wire connections are
monitored by theses systems.
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Checking engine speed signal:
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Checking engine speed sensor -G28.
Special tools and equipment
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VAG1526A
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VAG1594A
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VAG1598/31
NOTE: The engine speed (RPM) sensor detects RPM and reference marks. The engine cannot be started without a signal from the engine speed (RPM)
sensor -G28-. If the engine speed (RPM) sensor -G28- signal fails while the engine is running, the engine will stop immediately.
Test sequence
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Before performing test, check sensor for proper installation and proper fitting.
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Disconnect harness connector for the engine speed (RPM) sensor (identification: gray harness connector).