In order for the driver to be able to control the speed of the vehicle, a speedometer or speed indicator is provided in the design of the instrument panel. Few people think about how it works until it malfunctions. The drive mechanism is responsible for its operation, for which the VAZ 2107 uses a cable. This speedometer cable on the VAZ 2107 is far from eternal, so if a malfunction occurs, it will need to be replaced.
Causes of device malfunction
Signs of a device malfunction include incorrect readings and noise during operation.
The reasons may be the following:
- the counter is faulty;
- the fastening nuts are loose;
- break of a flexible cable;
- the tip or the socket into which it is inserted is damaged;
- the drive is broken or the socket through which it connects to the gearbox is damaged;
- The cable sheath is damaged.
Checking the mechanism for functionality
To diagnose the cause of the meter malfunction, you need to lift the car using a jack and remove the meter cable. At the next stage you will need an assistant. One person rotates the raised wheel while a second person watches the flexible shaft. If the cable rotates, then the reason is in the counter; if rotation does not occur, the cable will have to be changed.
The electronic device is checked by testing the instrument panel. Press reset and turn off the ignition. When the ignition is turned on again, the arrows on the speedometer should move three times. If they remain motionless, this indicates a malfunction of the meter.
Speedometer Troubleshooting Instructions
To carry out repair work, the VAZ vehicle should be installed on a lift or inspection groove.
Drive repair and replacement
To repair or replace this device, you must follow these steps:
- Using a “13” key, you need to unscrew the bolt on the clamp, thanks to which the exhaust pipe is attached to the gearbox.
- Then unscrew the flexible shaft fastening nut, the drive fastening nut and the nuts that secure the cross member to the body.
- The next step is to lower the rear of the gearbox so that the studs can come out of the crossmember holes.
- By moving the gearbox to the right, you can remove the device drive from its seat on the crankcase.
- Next, install the new device and perform the reverse steps of removal.
After repair work, it is necessary to check the device for operability (the author of the video is Evgeniy Aleksandrovich).
Replacing the cable
To carry out the procedure, you need to prepare the following tools:
- screwdriver;
- a set of keys;
- pliers;
- wire with a cross section of 0.2-0.5 mm, about 2 meters long.
Photo gallery “Removing and replacing the drive cable”
1. Unscrew the fastening nut.
2. We tie the wire to the eyes.
3. Install a new cable.
The procedure consists of a sequence of actions:
- The negative terminal from the battery is disconnected.
- First you need to disassemble the instrument panel, or rather remove it.
- To disconnect the cable, you need to unscrew the fastening nut.
- Next, a wire is screwed to its eyes.
- Then, unscrewing the nut securing the cable to the gearbox, separate them.
- When removing the cable, you should leave the wire in the car.
- Having untied the old cable, you need to tie a new one, having previously lubricated it with lithol.
- Then, using a wire, we pull the new part into the car interior.
- Installation is performed in reverse order.
Upon completion of the repair work, you should check how the meter will work.
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Replacing the speedometer cable and drive
If it is necessary to replace the VAZ 2106 speedometer cable (it sometimes frays or breaks), then remove the instrument panel, disconnect the cable from the product and the manual transmission and stretch the new product along its route.
Sometimes during operation it happens that the VAZ 2106 speedometer drive fails. Its replacement must be carried out either on a lift, or on a pit or overpass with a set of driver's tools and keys.
The work algorithm is as follows:
- We dismantle the fasteners of the “pants” clamp to the manual transmission;
- We remove the fasteners of the flexible shaft of the “six” speedometer drive and dismantle its fasteners;
- Remove the fasteners of the cross member to the body element;
- We lower the rear part of the manual transmission so that the fasteners free the technological grooves of the cross member;
- Use the lever to move the manual transmission to the right side and pull out the “six” speedometer drive from the corresponding place in the crankcase;
- We install the updated product using the reverse assembly algorithm. If it is necessary to replace the flexible shaft of the “six” speedometer drive, then you need to disconnect its fasteners in the upper position and remove it from the assembly groove.
Additional Information
Sometimes on car enthusiast forums the question arises of how to install a speedometer from a VAZ 2106 to an Izh 2126. The essence of the problem is this: different gearboxes require the use of different speedometer drives of the car.
According to their purpose, these elements serve to transmit the torsional moment from the secondary type manual transmission shaft to the flexible shaft of the vehicle speedometer drives. In terms of its parameters, the speedometer of the “six” is similar to a similar product on the IZH2126, so replacement is possible.
Another problem: sometimes people ask how to disassemble the speedometer of a VAZ 2106 for tuning. Here you will need to remove the car dashboard and the glass of the device. If this is necessary for repairs, then it is better to carry out this type of work in the presence of specialists who know the features of detailed disassembly and assembly of the device for determining speed.
Basic malfunctions of the speedometer drive mechanism
Structurally, the VAZ 2107 speedometer drive is a flexible steel cable, which is in an armored braid. This braid serves as a fixed base, since the main task of the cable is rotation. When it rotates inside the braid, torque is transmitted, which is removed from the gearbox and transmitted to the speedometer sensor. The braided cable design also uses connecting elements to transmit torque. One of these devices connects the drive to the gearbox gearbox, and the second to the speed indicator mechanism.
Knowing the structure of the drive mechanism, it is necessary to analyze its malfunctions. These malfunctions can be divided into two types:
- The main ones are when the speedometer completely stops functioning and displaying information about the current speed of the car.
- Secondary - when the speed indicator works, but at the same time makes extraneous noise.
The causes of the main types of breakdowns of the speedometer drive of the seven are as follows:
- Malfunction of the speed dial indicator. It happens rarely, but such a breakdown is not excluded.
- The flexible shaft has broken, which means the integrity of the steel cable is being compromised. To correct the situation, you need to change the cable.
- Self-unscrewing of the fastening nuts that secure the ends of the drive mechanism. This damage can be eliminated by tightening the fixing nuts.
- If the tips of the flexible drive are damaged - the driven and drive gears. When the speedometer on a VAZ-2107 does not work, the reasons for the breakdown may be hidden in a violation of the integrity of the tips, so in case of such a breakdown, you will need to replace the cable. If the speed indicator mechanism is damaged, the last part must be replaced, but the cable may still be in good condition.
- Flexible shaft drive malfunction. This is one of the most difficult breakdowns, when the breakdown concerns not the drive, but the gearbox. If the gearbox mating socket breaks down, the device will need to be repaired.
Also, during the operation of the seven, a type of breakdown may occur such as the occurrence of extraneous noise emanating from the speed indicator. The reasons for this phenomenon are:
- The bending radius of the cable is small, so it begins to rub strongly against the braid and creak. The damage can be corrected by leveling. If the device is not damaged, then it must be reinstalled.
- When the braid is damaged. The cause of damage is a violation of the integrity of the protective layer of the armored base. If the protective base is damaged, the drive must be replaced.
Do-it-yourself step-by-step replacement of the VAZ 2109 speedometer cable
VAZ speedometer cable
Failure of a car's speed indicator (in other words, the speedometer) does not pose a danger and does not harm other components of the car and does not affect the driving characteristics and controllability of the car. However, having no idea about the speed of movement, the driver risks getting into an accident or breaking traffic rules, it’s good if he gets off with a fine.
All malfunctions come down to a breakdown of the speedometer mechanism itself, or a break in its drive cable, the second most common reason. Replacing the VAZ 2109 speedometer cable is simple and accessible to everyone.
It is only important to be careful not to accidentally break the limiter or speed indicator, our instructions will help you with this
Speedometer device
The indicator is designed to inform the driver about the speed at which the car is moving, as well as the daily and total mileage. All information is reflected on the dial located on the dashboard.
On vehicles with a carburetor engine, a mechanical speed meter is installed, on engines with an injector - an electronic one.
The mechanical meter operates thanks to a worm gear and a metal cable through which the torque of the secondary shaft is transmitted. The electronic counter also uses a worm gear, only the rotations are transmitted to the speed sensor shaft. The information is displayed on the display.
Replacing the speedometer "six"
In the VAZ 2106, the speedometer is replaced in case of defects that cannot be eliminated during repair work, as well as when the VAZ 2106 speedometer does not work for one reason or another. The procedure for removing and installing it does not involve any complex technological operations; even a novice car enthusiast can carry out the replacement.
We tell you how to change the speedometer on a VAZ 2106 according to the order of the actions performed. So:
- We place the instrument panel on ourselves, having previously pressed out the fasteners in the technological holes of the panel with a screwdriver from below;
- Having slightly pulled out the instrument panel, unscrew the speedometer cable of the VAZ 2106, attached to the fastener to the rear part of the device;
- We dismantle the speedometer cable on the VAZ 2106, after which the dashboard will receive some freedom of movement and can still be moved towards itself;
- Disconnect the plug connector with wiring from the device;
- We unscrew the 2 fastening wheels with teeth along the edges of the product, which serve to secure its clamps; in case of complications, you can use pliers;
- After this, the device mounts are released and it is necessary to disconnect the device from the cable of the daily mileage fixation mechanism. To do this, unsplint the fasteners and disconnect this cable.
Now we remove the device. The question of how to change the speedometer has been removed from the agenda.
The cost of a VAZ 2106 speedometer is not small, about 1 thousand rubles, although at car dealerships it can be found for no more than 300 rubles.
Electronic speedometer for "six"
Some car enthusiasts tune the VAZ 2106 speedometer, for example, by painting the scales in bright colors, while others prefer to install an electronic speedometer on the VAZ 2106 of the UAZ type. Of course, this is associated with some inconveniences (the lack of indicator “windows” for turns and low beam, the scale for a lower speed value), but this is not difficult to correct structurally.
To install an electronic speedometer, you will need an additional 6-pulse sensor on the “mechanics”, and the speedometer cable is not required, it can be removed. A pulse sensor of any type for a metric thread on M18, it is possible with the following nomenclature number 342.3843 with a wire, the connector requires re-soldering. Speedometer block pinout:
and the pinout of the connector:
The connection diagram can be viewed here:
Important: When installing and connecting, we connect the positive contact on the speedometer with a similar contact on the tachometer to simultaneously initiate the devices.
Dismantling the VAZ-2107 speedometer drive
The actions are performed in the following sequence:
- the car is installed on an inspection hole;
- the ground wire is disconnected from the battery;
- the instrument panel is removed;
- the nut securing the drive to the speedometer is unscrewed and it is disconnected;
- a wire is tied to the eye of the nut;
- the nut securing the flexible shaft to the gearbox is unscrewed;
- the speedometer cable is disconnected from the gearbox;
- the drive is pulled out so that the guide wire remains in it;
- the wire comes untied from the nut.
Removing the speedometer
To determine the cause of incorrect readings or their absence and to replace the VAZ 2109 speedometer cable if necessary, in any case you will have to remove the speedometer.
Let's consider the procedure if the speedometer in your car is round, for example from a VAZ 2106, as in the photo below:
Round device like on a VAZ2106
- To remove a speedometer of this type, you must remove the front panel of the instrument panel
- First, unscrew the two bolts securing the plastic linings on the steering column, then alternately remove the lower and then the upper parts of the linings
- During this procedure, we remove the sealing ring from the ignition switch; it is important not to forget to install it back during assembly.
- On the front panel (its lower part) there are two recesses, at the same level as the steering column. They have holes through which we gain access to the brackets securing the panel
- We pry off the panel by inserting two flat (slotted) screwdrivers into them
- If these holes are covered with film or factory-made polymer, you just need to poke them out with a screwdriver, awl or knife
- The instrument panel will easily come out of the seat, providing free access to the speedometer and the place where the VAZ 2109 speedometer cable is attached
Old sample speedometer from VAZ2101
If the speedometer of your car is an old model, for example from a VAZ 2101, then we proceed as follows:
- To unscrew this type of speedometer, you will first have to remove the air vent located on the side of the cabin heater, or the windshield air vent
- They are attached with simple latches, which you just need to slightly pry (squeeze) with a screwdriver, or simply turn
- Through the opened hole we get free access to the clamps securing the instrument panel
- Release any lock (one is enough), then push the instrument panel into the cabin
- If the shield has not been removed for a long time and the retainer has become sour, then we recommend using WD-40 or its equivalent.
We determine the causes of the breakdown
After dismantling the front panel, we can easily remove the speedometer:
- To identify the cause of the problem - the speedometer mechanism or the drive cable is broken, you just need to twist the speedometer cable on the VAZ 2109 and monitor the operation of the instrument needle (here you need to be careful not to break the limiter)
- If the arrow rotates evenly and its rotation corresponds to the applied force, this means that the problem lies in the cable
- If the arrow “slips” or does not respond to cable turns, you need to replace the speedometer itself
- When replacing it, you should carefully examine the markings (color) on the back cover
- Different VAZ models use several types (types) of gearboxes with different gear ratios
- When we install a device that is designed for a different gearbox, the error in its readings can be up to 10 kilometers per hour for every 50 kilometers per hour
- That is, you are driving within the permitted limit of 60-80, but in fact you are already exceeding the speed limit and breaking the rules, a fine is the most harmless price in this case
- Compatible for different speedometer models and color coded
