Component description for the crankshaft position sensor - GF07.04-P-6010KE

ENGINE 271.921 /940 /941 /944 /946 /948 /955 /956

Arrangement

The crankshaft position sensor is located at the left rear on the crankcase.

Fig 1: Locating Crankshaft Position Sensor - Engine 271.921 /940 /941 /944 /946 /948 /955 /956

Task

The crankshaft position sensor detects the crankshaft position and motor speed.

Function

The distance between the crankshaft position sensor and teeth on the drive plate or flywheel (ca. 0.8 mm) is not adjustable, but is determined instead by the installation position.

Fig 2: Identifying Crankshaft Position Sensor Components - Engine 271.921 /940 /941 /944 /946 /948 /955 /956

L5 Crankshaft position sensor

The leading edge of a tooth generates a positive voltage pulse and the trailing edge a negative voltage pulse.

The distance from the positive to the negative voltage peak corresponds to the length of a tooth.

The gap produced by 2 missing teeth results in no voltage being generated in the crankshaft position sensor. This gap is used for detecting the TDC position of cylinder 1.

Fig 3: Identifying Crankshaft Position Sensor Function - Engine 271.921 /940 /941 /944 /946 /948 /955 /956