Speedometer pulse sensor
The rev pulses for the speedometer come from a reed sensor on the left side of the gearbox. A reed switch is a hermetically sealed contact group located in a gas envelope. The contact closes when a magnetic field acts on it. In order for the reed switch to supply impulses, it must close and open in the rhythm of the rotational speed. Therefore, the wheel with grooves rotating in front of the sensor affects the magnetic field acting on the contact group.
Checking the speedometer pulse sensor
Raise the left front wheel.
Press the retaining clip on the sensor plug and remove it.
Connect an ohmmeter to the sensor terminals.
Now slowly turn the left wheel by hand: the ohmmeter should fluctuate between 0 ohms and ∞.
If this is not the case, the sensor should be replaced.
Case back (2) removed from instrument panel (1). The printed circuit board is located in the housing cover (control device) for Mini-Check system (mini checks), Auto-check systems (autochecks) or onboard computer.
Disassembled combined instrument panel:
1 - main plate;
2 - on-board computer with an auto-check system;
3 - indicator of the amount of fuel;
4 - tachometer;
5 - speedometer;
6 - button for setting the meter of the distance traveled per day.
Removing the speedometer pulse generator
Press the retaining clip on the sensor plug and remove it.
Lightly press down on the latch on the mounting bracket and turn the sensor slightly to the right.
Pull the sensor out of the gearbox.
When installing, pay attention to the correct fit of the rubber sealing ring.
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