Jetta GLS Wagon L4-2.0L (AZG) (2002)
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Replace Engine Control Module (ECM).
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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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 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: Specified value: 730 ... 1000 Ohms
Continuation for all vehicles
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Check sensor for shorts 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 21,
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Vehicles with engine code AVH, AZG, item 16.
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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