E 320 CDI (211.026) L6-3.2L DSL Turbo (648.961) (2005)
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Transmission Speed Sensor: Description and Operation
GF27.19-P-5127-04N Speed Sensor, Function
GF27.19-P-5127-04N Speed sensor, function
- TRANSMISSION 722.9
- Turbine speed sensor
Component Identification
A permanently magnetized pole wheel (ring magnet (1)) and the turbine speed sensor (VGS) (Y3/8n1), which consists of magnetoresistive elements,
are used to record the turbine speed. A magnetoresistive element changes its resistance under the influence of a magnetic field. The ring magnet (1) is
stuck onto an aluminum ring plate and is connected with a ring gear of the Ravigneaux set.
Magnetic field changes occur due to the rotary motion of the ring gear and as a result a resistance change occurs in the magneto resistive elements An
electronic analysis system transmits this information to the fully integrated transmission control (VGS) control unit (Y3/8n4). By using this speed
recording system the measurement can take place over a greater distance than with the Hall sensor.
