New Beetle L4-2.0L (AZG) (2003)
Engine Speed Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Engine Speed (RPM) Sensor, Checking
The engine speed (RPM) sensor (G28) is a speed and reference mark sensor. The engine will not start if there is no speed signal. If the speed signal fails
when the engine is running, it will cause the engine to stall immediately.
Special tools and equipment
-
Scan tool VAG 1551 or vehicle system tester V.A.G 1552 with cable VAG 1551/3B
-
Test box V.A.G 1598/31
-
Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
-
Adapter set V.A.G 1594
-
Wiring diagram
Test sequence
-
Separate grey 3-pin connector -1- to engine speed sensor.
-
Measure sensor resistance between terminals 2 + 3 of connector to sensor.
Specification: 730 to 1000 Ohms
NOTE: The resistance figures are valid for approx. 20 °C. At higher temperatures the resistance figures will increase.
-
Check the sensor for short between terminals 1 + 2 as well as 1 + 3.
Specification: Infinity Ohms
If the specifications are not obtained:
-
Replace engine speed sensor (G28)