The hall sensor is installed in the ignition distributor of VAZ 2108, 2109, 21099 vehicles. It is designed to determine the moment of spark formation in the vehicle ignition system (analogous to the contacts in the contact ignition system).
If the Hall sensor fails, the car engine will either not start at all or will start and stall. If such problems occur with the car engine, the Hall sensor should be checked.
You can check it without removing it from the distributor. To carry it out, you will need a voltmeter or a similar device with a voltmeter mode and a pair of pins.
— We pierce the insulation of the green and white-black wires in the sensor connecting block with pins
— Connect the voltmeter leads to the pins
— Turn on the car ignition
— Slowly rotate the engine crankshaft
You can use a screwdriver to turn the flywheel splines in the hatch on the clutch housing.
— We monitor the voltmeter readings
When the crankshaft and the distributor slider rotate, respectively, the voltmeter readings should alternately drop to almost zero (0.4 V ) and rise to the voltage in the bot network or slightly lower ( 9-12 V ). If this happens, the Hall sensor is working and you should look for the fault somewhere else.
Notes and additions
If you don’t have a voltmeter, you can replace the Hall sensor with a known good one and evaluate the engine’s performance with it. To do this, you will have to remove, disassemble and reassemble the distributor, which is more labor-intensive.
— It is advisable to disconnect the wiring block from the Hall sensor with the ignition off, otherwise it may fail.
More articles on the ignition system of VAZ 2108, 2109, 21099 cars
Cars are constantly evolving, so the emergence of new devices is not a surprise. An example of the development of domestic automobile production was the appearance of a Hall sensor on carburetor versions of the VAZ 2109.
Functions and location
On carburetor VAZ 2109, the Hall sensor (HL) is responsible for opening and closing the contact group. When the screen with windows is rotated, a signal is sent to the device, which transforms into an electrical one. Through the switch, the signal goes to the ignition coil, and there it turns into an electric charge - a spark.
The DH is located at number nine on the ignition distributor. You need to look for the device under the dust shield. The sensor is secured to the base plate using rivets or a pair of screws. This already depends on the type of distributor used.
On injection VAZ 2109 there is no Hall sensor. Its functions are performed by the crankshaft position sensor.
How to check the hall sensor on a VAZ 2109 carburetor
Well, in general, I’m sitting here now, and I feel that anger is growing inside me towards those people who, apparently, do not understand how the contactless ignition system works and are trying to squeeze something out of themselves, insert their two cents, so to speak, into conversation. If you are one of them, then read carefully. Such experts claim that if there is no spark at the center (high-voltage wire from the coil to the distributor, that is, the distributor), then the hall sensor has nothing to do with it.
Let me ask you, why do you think a Hall sensor is needed? Is it possible to throw a spark through the cylinders? For this purpose there is a slider and a distributor cover. The Hall sensor is the initial stage of spark formation (!). Now I will try to explain clearly with an example. On the distributor roller there is a screen with slots as seen in photos 1 and 2. When this roller (and the screen, respectively) rotates, these slots (indicated with a screwdriver in the second photo) pass through the gap of the Hall sensor (indicated with a screwdriver in photo 3), resulting in the formation an impulse that then goes to the switch, then from the switch goes an impulse to the ignition coil, and then a spark comes from the coil! If the Hall sensor does not send a pulse, the switch will fail.
There is a fairly simple method that allows you to accurately verify that the Hall sensor is faulty: Turn on the ignition (do not turn the starter), remove the mother (chip) from the Hall sensor (photo 4), take a screwdriver or something else and short the middle wire to ground ( in my case there are only two wires, no one knows where the third one went
