VAZ 2115 pump relay where the fuel injector is located

Fuel pump fuse VAZ 2115

The fuel pump relay is located under the dashboard. On the passenger side, a side panel is opened that covers the beard on which the radio, on-board vehicle, and heater controls are mounted. We see a strip with three relays and fuses.

The pump relay is the lowest. Its fuse is also at the very bottom. When you turn the key, the relay turns on for 5 seconds in order to pump up pressure in the system and turns off. After the engine starts, control of the pump passes to the computer.

The mass of the pump (and fuel level sensor) is attached to the stud securing the handbrake to the body under the carpet. To get to it you need to remove the vestibule between the passenger and driver seats. There are 3 wires coming to the fuel pump: the first is +, the second is minus, the third is the fuel level sensor.

Where is

If we describe them from top to bottom, we get the following:

1. The fuse that controls the fuel pump. Its current strength is 15 amperes.

Lit

A fuse is a small element whose task in the design of electrical circuits is to melt in the event of an overload. The device melts and the current-carrying circuit opens.

Using the example of a solution from the popular VAZ Priora model, we can superficially examine the design and operating principle of the fuse. The device is small, the outer casing is made of plexiglass.

There is a conductive element inside. Such an element is based on several plates, which are made of different materials. Between these plates there is a special low-melting material. Electricity passes through this material, which allows the fuse to be an integral part of the electrical power circuit of the fuel pump. Fuses have a special marking in the form of the letter F. This designation indicates that the fuse element belongs to a circuit whose power is not large. To calculate the current that certain devices are designed for, you need to divide the power by 220. The result will be a figure in amperes.

If the fuse is blown, then such a malfunction is often caused by the following reasons:

— short circuit in the electrical circuit;

— failure of the fuel pump relay;

- low quality of the fuse itself;

In other words, more often the fuel pump fuse blows due to faults in the electrical circuits or as a result of failure of the components of the pump power circuit. Note that situations also arise when the fuel pump fuse burns on its own, but this phenomenon occurs much less frequently with high-quality elements.

How to identify a malfunction

The fuel pump relay turns on the fuel pump and delivers fuel to the injectors. The safety relay is activated when the engine is not running and the ignition is on (the control unit does not receive speed signals). This relay is switched off in the control unit via a safety switch and interrupts the power supply to the pump. For example, in the event of an accident, gasoline cannot flow into the engine. Checking the fuel pump is a job most likely reserved for service centers. In this regard, to find errors, we will limit ourselves to the following points:

— disconnect the fuel supply line at the distributor, while preparing a rag for spilled gasoline;

— even when the engine is turned off, a certain amount of gasoline may come out, since the system is under pressure;

— turn on the ignition for a short time without turning on the starter;

— if the pump does not start working, check the fuse or safety relay again;

— if fuel does not flow, check the pump relay;

Fault diagnosis

Diagnosis of the cigarette lighter on VAZ-2114 and 2113 is performed at home using the following tools:

1. Phillips and slotted screwdrivers.
2. Soldering iron (40 W).
3. Tweezers (curved and straight).
4. Pliers.
5. Tester for cars.

First you need to open the hood and remove the negative terminal from the battery (it is represented as a black wire) to turn off the power supply and prevent electric shock.

After this, you need to move the driver's seat to gain access to the part. Using a bright LED flashlight, assess the condition of the internal socket and make sure that there are no foreign objects, plates or fragments there. Any dirt can be removed using tweezers and two matches or a toothpick.

Next, the fuse is checked using a tester. The terminal with a minus value is connected to the vehicle ground, and the positive probe is fixed to the fuse. If the part is working properly, a characteristic sound will occur.

You should also inspect the soldering of the wires. The disconnected contact is soldered back. If “blackness” appears on the heating coil, you need to replace the “head”.

Relay and fuse block diagrams for VAZ 2115

The Lada 2115 was first released in 1997 and finished production in 2012. Over such a long period of time, the electronic components of the car have changed significantly. It is not surprising that modifications of the mounting blocks have changed more than once, and with them the fuses of the VAZ 2115.

An old-style car with a carburetor required one installer in the engine compartment. With the advent of a new 8-valve injector, a second unit was needed, installed in the cabin under the dashboard. Some of the new relays were placed under the steering wheel during the 2007 and 2008 upgrades.

The design of the mounting block box has become more modern over time. To make life easier for drivers, a diagram was placed on the lid and tweezers were attached for replacing elements.

How to connect a new one

When figuring out how to remove the device and install a new one, you should consider the following algorithm of actions:

1. After dismantling the negative terminal, it is necessary to remove the left plastic cover at the driver’s feet.
2. Next, you should disconnect the contact blocks and remove the backlight bulb.
3. Then you need to turn off the light filter and remove the old part from the center console using a screwdriver.
4. Having completed the installation of the new part, you can proceed to assembly, starting with the installation of the backlight ring.
5. At the next stage, the cigarette lighter is placed on the seat and connected to the batteries using a three-pin connector.
6. All that remains is to tighten the screws responsible for fixing the facing plastic and connect the electrical wires.

Connection diagram

Before carrying out any work to replace the cigarette lighter, you should familiarize yourself with the pinout diagram of the part on the VAZ-2114. It is necessary to adhere to the correct polarity, guided by the following wire assignments:

1. Black - represents the negative terminal or ground that connects to the body.
2. Red - is intended to supply voltage to the heating element and is connected using a 20 A fuse.
3. Yellow is the backlight wire.

The procedure for dismantling and assembling the cigarette lighter is not complicated. The main thing is to figure out where this element is located and how to change it with your own efforts.

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Relay under the hood

The main one is the fuse box near the engine. The vast majority of fusible protective elements and almost all relays are located here. During the existence of the model, its modifications changed several times. The most common modern block was presented in 2008. In this release, the arrangement of individual elements has changed slightly and new ones have been added.

You can find the block in the engine compartment above all the devices in the engine compartment. It is protected by a cover that can be easily opened by pressing two latches.

Repair

Before carrying out repair work, it is necessary to prepare a place near the vehicle, ensuring that the door opens freely. Next you should stick to the following scenarios:

1. The fuse has failed. To fix the breakdown, you need to find the location of the part by opening the hatch with the block. An important part is located to the left of the steering column and is a 20-amp fuse marked F4. Using a tester, you should evaluate its performance. If there is no voltage, you will need to purchase a new part.
2. Connector burnout. If traces of burning are found, you should not buy a new fuse without understanding what caused the problem. At the diagnostic stage, it is important to check the condition of the contacts on the blocks when leaving the mounting compartment.
3. Errors during operation. Some problems with the safety assembly are due to improper operation. Make sure the fuse plug is not pulled out or damaged.
4. Bulb burnout. Replacing the element is quite simple. Before doing this, remove the device from the socket.
5. Damage to the cigarette lighter core. Upon visual inspection, a number of damage to the core can be found. This part is not sold separately in auto stores, so the only option is to find it on the market from car enthusiasts.

VAZ 2115 fuse diagram

The most common models are 3722010 (since 2004) and 21150 3722 010 10. The set of protective elements of electrical equipment in them is not very different from each other, but there are differences, and they are reflected in the decoding of the diagrams below.

The main mounting block under the hood of the car.

Recommendations for care and maintenance

• Buy original fuses. Domestic or foreign, it doesn’t matter;
• Install strictly in accordance with amperage ratings. Unacceptable with lower or higher current strength. In the first case, this will lead to damage to the module, in the second - to breakdown of the unit, which is attached to the fuse;
• Carefully check the quality of fixation of terminals and limit switches on the board. If loose, tighten and press with pliers. A spark can cause a fire and melting occurs;
• If moisture gets in or condensation forms inside the mounting block, remove the cover, dry it, and if necessary, blow it with a stream of compressed air.

Carry out preventive and diagnostic work in the fuse box with the battery terminals removed in order to prevent a short circuit in the circuit.

The average service life of fuses is 40 – 60 thousand km. The service life of foreign analogues is 10–15% longer. Before replacing, read the instructions and get advice from service station specialists.

Why does the cigarette lighter on the VAZ 2114 not work?

There are several characteristic failures for the VAZ 2114 cigarette lighter:

• The fuse blows;
• There is poor contact in the block;
• The contacts of the device burn out during operation;
• The backlight bulb burns out;
• Contacts oxidize during use;
• A short circuit occurs when foreign devices are connected.