Car Skoda Octavia Tour remains one of the most reliable representatives of the budget segment, however, over time, even such cars encounter problems in the engine starting system. One of the common reasons why the engine does not show signs of life when you turn the key is failure starter relay. This compact but critical device is responsible for supplying voltage to the starter, and its malfunction can paralyze your drive at the most inopportune moment.
Owners Octavia Tour A malfunction of the relay itself is often confused with a breakdown of the starter solenoid relay or a low battery. It is important to understand the difference between these components, since diagnostic methods and repair costs are radically different. In this article we will look at how to find a relay, check its functionality and replace it yourself without contacting a service center.
Location and purpose of the starter relay in Octavia Tour
Engine starting system in the model Octavia Tour (produced on the basis of the first generation A4) has its own characteristics. The starter relay is not always located in the usual places under the hood. On most modifications with gasoline and diesel engines, it is integrated into the fuse box.
You need to open the fuse box cover located on the left side of the dashboard and carefully examine the diagram on the inside of the cover. The item you are looking for is often labeled as a Starter Relay or has a specific number, for example, 109 or 179, depending on the year of manufacture and configuration. Connection diagram May vary slightly depending on body type and gearbox installed.
The function of this element is to switch powerful current from the battery to starter traction relay after the driver turns the key in the ignition. Without this signal, the retractor relay will not work, and the bendix will not engage the flywheel teeth, even if the starter itself is working.
Main symptoms of a relay malfunction
Symptoms of failure can be deceiving, so don't buy a new starter right away. If you do not hear a characteristic click when you turn the key, and the instrument panel goes dark or flashes, the problem is most likely in the power circuit. However, if you hear a clicking sound but the motor does not turn over, this may indicate a problem with the relay itself or the contacts.
One of the sure signs is the lack of response from the starter when the battery is fully functional. You can check the voltage at the terminals and it will be fine, but when you try to start there is no current getting to the starter. In this case, you need to check control circuit and the state of the relay itself.
Sometimes the relay works intermittently. The car may start the first time in the morning, but require several attempts in the evening. This is a classic symptom of burnt contacts inside the element housing. In such situations, lightly tapping the fuse box housing helps, which temporarily restores contact.
Diagnostics and performance check
Before buying a new part, you need to make sure it is faulty. The easiest way is the replacement method. If you have access to a similar relay from another machine, or even from a nearby fuse with the same marking, try swapping them. If the starter starts working, then the diagnosis is confirmed.
A more accurate method requires multimeter. You need to remove the relay and check the integrity of the winding between the control contacts (usually pins 85 and 86). When the rated voltage is applied to these contacts, a clear click should be heard, and the power circuit contacts (30 and 87) should close.
If the relay does not click when voltage is applied, it is faulty. If it clicks, but no current flows, it means the internal contacts are burnt. Also worth checking contact status in the block where the relay is inserted. Oxidation or melting of the plastic can cause poor contact even with a working relay.
- Never
- Rarely (once a year)
- Often (several times a year)
- Constantly
Step-by-step instructions for replacing the relay
The replacement process does not require special equipment and takes minimal time. First you need to turn off the power to the car by disconnecting the negative terminal of the battery to avoid a short circuit when manipulating the fuse box. This is a required security step.
Next, you need to remove the plastic cover of the fuse box and remove the faulty relay. B Octavia Tour it usually fits snugly into the socket, so a little force may be required. It is recommended to use a special key to remove the relay, which is often included with the car or sold separately.
Install the new relay into the socket until you hear a characteristic click, making sure that it is level and all legs are in contact. Connect the battery, turn on the ignition and try to start the engine. If everything is done correctly, the launch should happen instantly.
☑️ Check before replacement
It is important not to confuse the relay with neighboring elements that have a similar body. Check carefully with Fuse location diagram, which is located on the inside of the block cover. The error can lead to the failure of other vehicle systems, such as the fuel pump or cooling fan.
Features of relays on diesel engines
On diesel versions of the Octavia Tour, the starting circuit may include additional relays to control the glow plugs. If you have replaced the starter relay but the engine still does not start, check the condition of the heater relay. Often they are in the same block, but have different markings.
Compatibility table and articles
When choosing a new spare part, it is important to focus on the correct part number. For Skoda Octavia Tour There are several relay options depending on the year of manufacture and engine type. Using the wrong element may result in rapid breakdown or failure of the starting system.
Below is a table with the main part numbers and relay characteristics that may be suitable for your vehicle. Be sure to check the markings on the old item before purchasing.
| Article number (OEM) | Purpose | Engine type | Contact power |
|---|---|---|---|
| 1J0 906 381 | Starter main relay | Gasoline 1.6, 1.8 | 40 A |
| 1J0 906 381 A | Improved version | Petrol 1.8 T, 2.0 | 40 A |
| 1J0 906 381 B | Relay for diesel versions | 1.9 TDI | 40 A |
| 1K0 906 381 | Analogue for facelift | All types | 40 A |
You can also consider high-quality analogues from trusted manufacturers, such as Bosch, Hella or Valeo. They often cost less than the original but offer similar build quality and durability. The main thing is to make sure that the number of pins and their location match.
⚠️ Warning: Never attempt to start the engine using a jumper across the relay contacts unless you are a professional electrician. This could result in a serious short circuit, wiring fire, or failure of the electronic control unit (ECU).
Reasons for repeated failures and prevention
If a new relay fails after a short period of time, the problem lies not in the part itself, but in the operating conditions. The most common cause is increased starter current consumption. Wear of the starter bushings or jamming of the bendix creates a colossal load on the relay contacts, which leads to their rapid burning.
It is also worth paying attention to the condition of the engine mass. Poor negative contact with the body or engine forces the current to seek other paths, which can cause voltage surges and overheating of the relay. Check contact bolts and clean them from oxides and rust.
Another factor is moisture. Fuse box in Octavia Tour is located in the cabin, but moisture can get inside through the seals or if the wiring is in poor condition. This causes corrosion of the relay legs and block. Regularly checking the integrity of the seals and cleaning the contacts will help extend the life of the elements.
Periodically check the condition of the contacts in the fuse box. Use a special contact spray to clean and prevent oxidation. It's cheap but effective in preventing many startup problems.
Don't forget that the relay is a consumable item. Under the conditions of Russian roads, with their temperature changes and fuel quality, its service life may be reduced. Schedule a preventive inspection of the starting system at every maintenance.
The starter relay is the weak link in the starting circuit and often suffers from overload. Regularly checking the condition of the starter and wiring will prevent sudden relay failures.
Cost of repairs and choice of venue
Replacing the starter relay is one of the cheapest car repair procedures. The cost of the element itself varies from 800 to 2500 rubles, depending on the brand and originality. If you decide to do the work yourself, the costs will be limited to purchasing spare parts only.
Contacting a specialized service will require payment for diagnostics and work of the specialist. On average, the cost of replacement at a service station will be from 1,500 to 3,000 rubles including the spare part. However, if the problem is deeper (for example, a malfunction of the starter itself or the wiring), specialists will be able to conduct a comprehensive diagnosis and eliminate the cause, rather than simply replacing the part.
If you are not confident in your abilities, it is better to entrust the work to professionals. Incorrect connection can lead to failure of other vehicle systems or even fire. In any case, knowledge of the operating principles and location of the relay will help you control the repair process and not be deceived in the service.
The myth of "eternal" relays
There is an opinion that the starter relay is a device that breaks down extremely rarely. In practice, especially on cars with high mileage, the relay fails quite often due to switching high currents. Don't expect it to last another 10 years without problems.
FAQ: Frequently asked questions
Is it possible to start the engine without a starter relay?
Technically, this is possible by supplying power directly to the starter traction relay, but this is extremely dangerous and is not recommended for daily use. This method may cause a short circuit and damage the wiring.
Why does the relay click but the starter does not turn?
If the relay clicks, it means it is working properly and receives a signal from the ignition switch. The problem is most likely in the starter itself (wear of brushes, solenoid relay) or poor contact of power cables (battery-starter).
Can I use a relay from another VW Group model?
Relays from other models of the VAG group (Volkswagen, Audi, Seat) may be suitable in terms of electrical characteristics, but you must definitely check the number of pins and their purpose. Incorrect connection may damage the ECU.
How often should the starter relay be replaced?
The manufacturer does not have strict replacement regulations. The relay changes as it fails. However, with a mileage of over 150,000 km, it is recommended to carry out a preventive check and, if necessary, replacement.
Where to buy an original relay for Octavia Tour?
Original spare parts can be purchased from official Skoda dealers or in specialized online auto parts stores. It is also acceptable to use high-quality analogues from the Bosch or Hella brands, which are often installed on the conveyor.
⚠️ Attention: Never replace the starter relay with a more powerful one without consulting a specialist, as this may lead to overheating of the wiring and a fire.
Remember that timely diagnostics and correct selection of spare parts are the key to the long service life of your car. Don't ignore the first signs of trouble and pay attention to the condition of the electrical system.