Golf L4-2.0L (BEV) (2004)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) Sensor, Checking
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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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Work sequence
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Disconnect gray 3-pin harness connector (arrow) to 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 to 1000 Ohms
Vehicles with engine code AVH, AZG, BBW, BEV:
Specified value: 730 to 1000 Ohms
Continued for all vehicles
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Check sensor for short circuit between terminals 1 + 2 as well as 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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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes.
If no malfunction is found on sensor:
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control