Touareg V8-4.2L (AXQ) (2006)
Engine Speed Sensor: Testing and Inspection
Diagnostic Procedures
Engine Speed Sensor, Checking
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.
Special tools, testers and auxiliary items required
‹› Multimeter (VAG1526) or multimeter (VAG1715)
‹› Connector test kit (VAG1594)
‹› Wiring diagram
Test requirements
‹› Ground (GND) connections between engine and chassis must be OK.
‹› Ignition switched off.
Test sequence
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Disconnect gray 3-pin harness connector (arrow) to Engine Speed (RPM) Sensor (G28).
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Measure sensor resistance between terminals 2+3 at connector to sensor.