Many crossover owners Nissan Qashqai first generation (J10 body) are faced with the problem of sudden engine failure. In such a situation, the culprit is often not the starter itself, but the control relay. Finding this small element in a dense web of wiring can be difficult, especially if you are not familiar with the electrical system architecture of a Japanese car.
Understanding that where is the starter relay located, is critical for rapid diagnosis. Incorrect actions may result in short circuit or damage to adjacent units. In this article we will analyze in detail the location of the element, the nuances of checking it and the replacement procedure so that you can solve the problem yourself.
General power supply diagram and role of relays
Engine starting system Nissan Qashqai J10 is built according to the classical scheme using a control relay. This device serves as an intermediary between the ignition switch and the powerful electric starter motor. The main task of the component is to switch the high currents consumed by the starter without passing them through the ignition switch contacts, which prevents them from overheating and burning out.
It is important to understand that the malfunction starter relay often simulates a breakdown of the starter or battery itself. If you only hear a click or silence when you turn the key, you should not immediately replace the expensive starter unit. First you need to check the control signal that is supplied through the relay.
By car Nissan With MR20DE and K4M series engines, the anti-start protection system is also integrated into the relay circuit. The immobilizer unit (NATS) must give permission to close the contacts, otherwise even a working relay will not work.
Localization of the mounting block in the engine compartment
Main fuse mounting block on Nissan Qashqai J10 is located in the engine compartment, on the right side (when viewed in the direction of travel), closer to the mudguard. This is where the relay responsible for powering the starter is located. However, for different years of manufacture and depending on the configuration, its markings may differ.
To get to the place where starter relay is located, you will need to open the hood and unfasten the plastic latches of the block cover. The lid is usually marked "ENGINE ROOM FUSE BOX". There is often a diagram glued to the inside of the lid, but it can be erased or unclear, so relying on it alone is risky.
Inside the block you will see many black and gray cubes of different sizes. The starter relay, as a rule, has a standard shape and size corresponding to GOST or ISO. For an accurate search, you need to focus on the color coding and markings on the case, which can be printed in small print.
Diagnostics and performance check
Before replacing a component, you must verify that it is faulty. The easiest way is to replace it with a known-good analogue. On Nissan Qashqai J10 relays are often used with the same pinout for different purposes, such as a cooling fan or a fuel pump. You can temporarily rearrange them for testing.
If after the rearrangement the engine starts, then the problem is in the relay. You can also use a multimeter to test the contacts. If you do not have a device, you can try to apply voltage directly to the relay coil, but this must be done extremely carefully, observing the polarity.
Sometimes the problem lies not in the relay itself, but in oxidation of the contacts in the block or poor ground contact. Inspect the connectors for signs of corrosion or melted plastic. If the contacts are burnt, simply replacing the relay will not have a lasting effect.
- Clicking on startup
- Silence when turning the key
- The starter turns but does not engage
- The engine starts with half a turn
Step-by-step instructions for replacing an element
The replacement process does not require complex tools and takes no more than 15 minutes. The main safety rule is that before starting work, be sure to disconnect the negative terminal of the battery to eliminate the risk of a short circuit when removing the cell.
You need to follow these steps for a successful replacement:
- 🛠 Open the hood and remove the plastic cover of the mounting block.
- 🔍 Look for a relay labeled "START" or "ST" (sometimes indicated by a number code).
- 🔌 Gently pull the relay up, holding it by the body so as not to damage the wiring.
- 🔄 Install the new relay into the connector until it clicks.
After installing the new device, connect the battery and check the engine starts. If the problem was with the relay, the car should start right away. If not, the problem is deeper, and diagnostics of the wiring or the starter itself is required.
It is important to note that on some modifications Nissan the relay can be soldered to the board or located in a separate engine control unit, but for Nissan Qashqai J10 This is a standard replacement element.
☑️ Check before replacement
⚠️ Attention: Never attempt to remove the relay without de-energizing the system. High current in the starter circuit can cause arcing and burns if the contacts short-circuit during removal.
Specific location on different modifications
Although the general electrical diagram is Nissan Qashqai J10 is unified, there are nuances depending on the type of engine. On vehicles with a 2.0 dCi diesel engine, the starting system may have additional spark plug relays, which are located next to the starter relay and can be confused.
On versions with a manual transmission, a separate starter interlock relay is sometimes used, which is activated only when the clutch pedal is depressed. If the car does not start, check this element as well, as it often fails due to vibrations.
Owners of cars with automatic transmission should take into account that the relay can only be activated when the selector is in the “P” or “N” positions. In other cases, the control unit blocks the signal from the starter relay.
Decoding markings and pinouts
To select the correct analogue, you need to know the pinout of your relay. Standard starter relay on Nissan usually has 5 or 4 contacts. Contacts 30 and 87 are responsible for the power circuit, and 85 and 86 are for the control coil.
Below is a table with the approximate location of contacts and their purpose for the most common relays on this model:
| Contact number | Purpose | Wire color (approximate) | Comment |
|---|---|---|---|
| 30 | Powered by battery | Red | Constant plus |
| 87 | Load (starter) | Yellow/Orange | Goes to the solenoid relay |
| 86 | Management (plus) | Green/White | Comes from the ignition switch |
| 85 | Weight (minus) | Black | Connected to body |
| 87a | Normally closed | — | Often not used |
Please note that wire colors may vary depending on the year of manufacture and country of assembly. Always check the diagram on the block cover or in the technical documentation specifically for your VIN code.
What to do if the relay is not available?
If the original relay is not available, a universal 5-pin relay with similar current ratings can be used. The main thing is to connect the power and control contacts correctly so as not to burn the ignition coil.
Consequences of ignoring a fault
If you hear a characteristic click, but the starter does not turn, this may mean that the relay is completing the circuit, but cannot withstand the current load. In this case, the contacts inside the relay may become welded or melted. Operating a vehicle in this condition is dangerous.
An overheated relay can cause a fire in the wiring in the engine compartment. The plastic of the mounting block melts, which leads to a short to ground and failure of other electronic components, such as the ECU or the comfort unit.
Sometimes owners try to solve the problem by supplying power to the starter directly by bridging the contacts. This is a temporary measure for emergency starting, but constant operation in this way is strictly prohibited, as the ignition switch burns out.
⚠️ Attention: Do not use thick wires to “light” the starter directly through the ignition switch. This will lead to burnout of the lock contact group and will require expensive repairs of the entire steering column.
When purchasing a new relay, be sure to pay attention to the current rating. A diesel engine starter requires a higher rated relay than its gasoline counterpart.
Correct diagnosis of the starter relay on the Nissan Qashqai J10 allows you to avoid replacing the starter itself, saving significant money and time on repairs.
Alternative reasons for failure to start
If replacing the relay does not help, the problem may lie in the starter solenoid relay itself. This is a separate unit that often fails due to wear of the bendix or burnt contact group inside the starter.
It is also worth checking the condition of the battery. A weak charge may cause the relay to operate, but there is not enough voltage to crank the crankshaft. In this case, the starter makes a wheezing sound and stops quickly.
There may be a problem with the wiring. In cars Nissan Qashqai J10, released in the first years of production, there was corrosion of the connectors in the area of the motor shield. Check the integrity of the wiring harnesses leading from the fuse box to the starter.
⚠️ Attention: If you see traces of oil or antifreeze on the relay block, repair the leak immediately. Liquids entering the electrical unit will cause oxidation and short circuits that cannot be corrected by simply replacing the relay.
Conclusion and recommendations for maintenance
The starter relay is a consumable item that must be replaced at the first sign of trouble. Regularly checking the contacts and cleaning the mounting block from dust and moisture will significantly extend the service life of your electrical system. Nissan Qashqai.
Keep a spare relay in the glove compartment or toolbox, especially if you frequently travel to remote areas. This simple action can save you from being parked on the side of the road for a long time in case of a sudden breakdown.
Remember that where is the starter relay located - this is only half the battle. The ability to correctly diagnose and replace it is the key to independently solving problems with starting the engine without contacting a service center.
Is it possible to start the engine without a relay?
In an emergency, you can close the power contacts of the relay with a screwdriver, creating a spark. This is safe only if you are sure that the ignition switch is working properly and there are no short circuits in the circuit.
Frequently asked questions (FAQ)
Where exactly is the starter relay located on the Nissan Qashqai J10?
It is located in the black plastic fuse box under the hood, usually to the right of the engine. There is a diagram on the block cover where you need to look for the designation “START” or “ST”.
How to test the starter relay with a multimeter?
It is necessary to measure the coil resistance between contacts 85 and 86 (it should be in the range of 60-90 Ohms), and also ring the power contacts 30 and 87 in a de-energized state (there should be a break).
Is it possible to replace the starter relay with an analogue from another car?
Yes, if the number of contacts, their location and rated current match. Relays from other Nissan, Toyota models or universal 5-pin relays are often suitable, but it is better to use the original.
Why does the relay click but the starter does not turn?
This may mean that the relay closes the circuit, but cannot withstand the current (the contacts inside are burnt), or the problem is in the starter itself (wear of the retractor or bendix), or a weak battery.
How much does a starter relay cost for a Nissan Qashqai J10?
The price of the original relay varies depending on the supplier, but usually ranges from 1,500 to 3,000 rubles. Analogs can cost 2-3 times less.