GF07.04-P-6221CY Component Description For the Crankshaft Hall Sensor

GF07.04-P-6221CY Component Description For The Crankshaft Hall Sensor
- up to model year 08


Location

Component Identification:

The Hall sensor is located behind the left cylinder bank on the transmission flange.

Task
The Hall sensor detects the position and rotational speed of the crankshaft in a non-contact manner via the increment wheel (perforated plate) on the starter ring gear.

Design
The Hall sensor and its electronics are cast in a plastic housing with a 3-pin connector. The distance to the increment wheel is dictated by the installation position and is about 0.3 to 1.3 mm.

Function

Component Identification:

The Hall sensor scans the perforated plate with its 58 links and the gap of 2 links (60-2).
Each 4 mm wide link generates a signal change at the Hall sensor. In the center of the link, the signal changes from approx. 5 V (high) to approx. 0 V (low). No signal change takes place at the gap with the 2 missing links. At the second falling (negative) signal edge after the gap the ME-SFI [ME] control unit (N3/10) detects the top dead center position of cylinder 1.

Only the negative signal edge of the signal is permanently evaluated. For a frequency measurement, the gap between two negative edges must be measured.
The signal for the rising (positive) signal edge fluctuates and is therefore not used.