Passat GLS L4-1.8L Turbo (AUG) (2001)
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Check sensor for short circuits between terminals 1 + 2 and 1 + 3. Specification: Infinity Ohms
If specified values are not obtained:
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Replace engine speed (RPM) sensor -G28-
If no DTC is found on sensor:
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Connect VAG 1598/31 adapter cable to control module wiring harness. Engine Control Module (ECM) is not connected.
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Check wires between test box and 3-pin connector for open circuits according to wiring diagram.
Terminal 3 + socket 82
Terminal 2 + socket 90
Terminal 1 + socket 108
Wire resistance: max: 1.5 Ohms
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Also check wires for short circuit to each other.
If no malfunctions are found in wires:
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Remove sensor and check sensor wheel for secure fit, damage, and run-out.
NOTE: There is a larger-sized gap on the sensor wheel. This gap is a reference mark, not damage.
If nothing seems to be wrong with the sensor wheel:
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Replace Engine Control Module (ECM).