New Beetle GL L4-2.0L (AZG) (2002)
Engine Speed Sensor: Testing and Inspection
With Generic Scan Tool
Check Engine Speed (RPM) Sensor
Function
The Engine Speed (RPM) Sensor -G28- detects engine speed and reference marks. Without an engine speed signal, the engine will not start. If the engine
speed signal fails while the engine is running, the engine will stop immediately.
Recommended special tools and equipment
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VAG 1526 multimeter or VAG 1715 multimeter
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VAG 1594 connector test kit
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Wiring diagram
Test sequence
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Disconnect gray 3-pin harness connector (arrow) to the engine speed (RPM) sensor.
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Measure sensor resistance between terminals 2 + 3 at connector to sensor.
Vehicles with engine code AEG: Specified value: 480...1000 Ohms
Vehicles with engine code AVH, AZG, BDC: Specified value: 730...1000 Ohms
Continuation for all vehicles
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Check sensor for short circuit between terminals 1 + 2 and 1 + 3. Specified value: Infinite Ohms
If specified values are not obtained:
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Replace Engine Speed (RPM) Sensor -G28-:
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Vehicles with engine code AEG, item 11,
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Vehicles with engine code AVH, AZG, item 21,
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Vehicles with engine code BDC, item 21.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes