Engine speed sensor, checking: Notes

The Engine speed (RPM) sensor G28 is a speed and reference mark sensor. The engine will not start if no speed signal is present. If the speed signal fails when the engine is running, it will cause the engine to stall immediately.

Special tools, testers and auxiliary items required 

• Test box V.A.G 1598/22 (through my 1999)
• Test box V.A.G 1598/31 (from my 2000)
• Digital multimeter US 1119 (Fluke 83 or equivalent)
• Adapter set V.A.G 1594

• Wiring diagram