Sandero won't start. Why Renault Logan won't start: the main reasons. So, we will simulate a problem situation

Good evening. Renault Sandrera 2010 suddenly stopped starting. Mileage 56 thousand. The problem happened when my wife went to pick up the children from the dacha in the Yaroslavl region. From Moscow to the dacha, my wife drove normally. Travel time was 7 hours. The next day, my wife was going to drive back to Moscow, but the car would not start. We put another battery - it started up. After the battery was removed from the started car, it stalled. We borrowed a battery from a neighbor and went to Moscow. Travel time was 4 hours. The car arrived. The question is, what could be the malfunction? Old battery? Generator? Is it possible to remove the battery on sanders while the engine is running?

1 answer

Good afternoon.
it is very undesirable to remove the battery on a running machine (except for cars where there is no electronics such as a penny old Muscovites), there are jumps in the electrical system and some kind of sensor may burn out, it is best to light it with wires.
if I understand correctly, it does not start, it turns badly or does not turn the starter at all.
the reason that the car did not start the battery sat down.
But that's why he sat down for two reasons, or the battery has become unusable, or charging is not in progress.
when the car is driving, the warning light is on "battery" on the tidy, signaling that there is no charge?
first of all, with the battery installed on the car, measure the voltage at the terminals, it should be in the region of 12.5 - 12.8 volts, then start the car and also measure the voltage at the terminals about 13.8-14.5 volts, (check voltage should increase slightly) this indicates that the generator is working. also turn on as much as possible all electrical consumers at the terminals, the voltage should be at least 12.8 volts.
if the generator is working, then the whole battery is to blame.

Recently, more and more requirements for environmental friendliness and safety have been imposed on cars. As a result, the number of installed sensors and units increases. Over time, this becomes the cause of a large number of breakdowns. For example, after a while Renault Logan may not start well. In this case, you can try to contact the service center or, according to the main signs, eliminate the malfunction yourself.

We will try to take a closer look at common problems and the main ways to fix them in this article. Almost all of them are associated with the fact that Renault Logan is bad to start on a cold one.

If the Renault Logan engine does not start, the starter turns but the car constantly stalls, then there are several main causes of malfunctions:

• Malfunctioning fuel regulator
• Candles do not spark, coil problem
• Incorrect installation of timing marks, desynchronization of the ignition phases
• Failure of the throttle, which is responsible for supplying the air mixture
• Failure of the immobilizer, loss of communication with the chip
• Clogged fuel injectors, poor atomization of fuel
• Dirty fuel filter

Diagnostics

To fix the problem, you first need to determine exactly at what level of the system the failure occurred. This requires component diagnostics, during which some peculiarities should be taken into account:

• If the pressure regulator is out of order, then you must immediately change this component to a new one. To do this, you must first disconnect the fuel return hose, then turn on the ignition. If fuel begins to flow from the hose, this will indicate a failure of the regulator. If this problem occurs while driving, on the highway, then you need to squeeze the tube or muffle it with something so that you can get to the nearest service station
• When the spark fails, it can also cause serious engine interruptions. In this case, you need to use a special candle wrench, with which all candles are unscrewed. You need to carefully examine the electrodes and tips high-voltage wires... If there are traces of carbon deposits, then most likely they are defective. For a quick check, you can ask the assistant to turn the ignition key for a few seconds so that the starter turns a little but the engine does not "grab". At this time, it is tedious to connect the candle to the high-voltage wire and watch for the appearance of a spark. If it is absent, then you can get to the place of repair, but an accurate diagnosis of the unit and its replacement should be carried out as soon as possible. It is important to remember that high voltage wires represent a great danger and diagnose and work with them should be done with extreme caution.
• Incorrectly set timing marks of the valve timing lead to the fact that the engine starts to work with strong interruptions and jumps in speed. This will also be accompanied by strong pops from the exhaust manifold. The malfunction can only be rectified if there is special equipment... It is not recommended to try to independently adjust the timing phases if a breakdown occurs on the road, this should only be done by specialists at the service station.
• Improper throttle setting or contamination can be detected in several ways. The most effective is to disconnect the air pipe and inspect the condition of the damper, search for defects on the walls of the body and traces of wear.
• If Renault Logan does not start or immediately stalls after starting, then you need to look at the immobilizer lamp indication, which is located on the instrument panel. The reason may be the loss of communication with the chip. In this case, reprogramming of the key may be required, so when traveling on long journeys it is always better to have a working duplicate with you in order to be able to start the car.

There are many answers to one of the most popular questions on car Internet forums. Of course, without being able to diagnose, or at least visual inspection car, it is often impossible to get to the bottom of the problem and identify its cause. However, malfunctions due to which Renault may not start can be roughly divided into several categories depending on the "symptoms":

Does not turn the starter:

Battery is not supplying sufficient voltage

This can usually be understood by the dashboard dying out during an attempt to start, or when there is no power to all the car's devices at all. Solved by replacing or charging the battery;

Open circuit of the starter power supply

There are times when the wiring from the control unit to the starter is damaged, or there is poor contact at the terminals of the starter solenoid relay. To solve the problem, wiring repair or cleaning / tightening of the terminals is required;

Starter defective

After making sure that the starter power is normal, you can come to the conclusion that the starter itself is broken. In this case, repair or overhaul (cleaning / lubrication) of the starter is required;

It is possible that no power is supplied to the starter motor. This can be due to both a blown fuse and a serious breakdown. electronic system car. If the fuse has nothing to do with it, it is better to contact a qualified service;

Engine jammed

The most "sad" of possible options when the starter does not turn just because it cannot turn crankshaft due to mechanical failure of the engine. Usually solved overhaul or replacing the engine (or cylinder head);

Fuel does not flow:

The fuel in the tank has run out

If the fuel level sensor fails, it can mislead the driver by showing a sufficient fuel level when it is actually absent.

Solved by refueling;

Damaged fuel line

It happens especially after driving off-road. Fuel pipe can be ripped off or killed. In this case, the fuel flows out without reaching the injectors. It is solved by replacing or repairing the damaged part;

Fuel injectors do not work(for gasoline engines)

Usually associated with a lack of power to the injectors from the control unit, since it is almost unrealistic for all fuel injectors to fail at the same time. May require repair or replacement of the engine control unit (“brains”);

Fuel pump is not powered(for gasoline engines)

As in the case of a lack of power to the starter, it can be solved by replacing the fuse. Otherwise, qualified diagnostics by the scanner is required;

Fuel pump defective(for gasoline engines)

No spark:

Ignition module (coil) does not work

Spark plugs require replacement (cleaning)

Malfunction of one of the sensors responsible for the correct operation of the engine or engine control unit

Electrical sensors that transmit parameters to the engine control unit can directly affect the start of the car, namely, block the spark or the fuel supply when trying to start. The problem requires a competent diagnosis with a scanner;

Violations in the intake or exhaust systems engine:

Intake tract problems

Due to worn intake manifold or throttle gaskets, as well as general contamination of components such as: throttle, regulator idle move, gas recirculation valve, etc. - starting the engine may be difficult or impossible. It is solved by cleaning the listed parts and replacing the necessary gaskets with new ones, after which it may be necessary to reset the adaptive settings of the ECU with a scanner;

Clogged catalyst

If the catalyst has collapsed and clogged exhaust pipe, the engine may not start. the exhaust gases will have nowhere to go. In this case, the catalyst is removed from exhaust system and, either change to a new one (which is very expensive), or reflash the engine control unit for operation without a catalyst;

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In the article we will consider possible malfunctions that may arise during the operation of the Renault / Dacia Sandero car.

The engine will not start

Starting the engine with the fuel injection system is the same at all ambient temperatures and the liquid in the engine cooling system.

To start the engine, you just need to turn on the starter without pressing the gas pedal, and the system will automatically adjust to the necessary parameters of fuel supply and ignition timing.

If the engine does not start after three attempts, then:

Open the hood by pulling the drive handle towards you

We measure the oil level with a dipstick

In the K4M engine, the oil level should be between the upper and lower boundaries of the shaded area

In the K7J and K7M engines - between the lower and upper marks on the dipstick

Checking the coolant level

It must be between the MIN and MAX marks on the expansion tank.

We examine the engine. Pay attention to the drips of gasoline, oil and coolant.

We check the integrity of the wiring.

We check the fit of the pads of the wiring harnesses in the connectors of the ignition coils.

After inspecting the engine and systems, we try to start the engine again.

If the engine does not start on the first try, then press the gas pedal all the way and turn on the starter for two to three seconds.

In this mode, the cylinders are purged, no fuel is supplied through the injectors and no voltage is supplied to the spark plugs.

After purging the cylinders, we try to start the engine in normal mode, without pressing the gas pedal.

If, nevertheless, the engine does not start, then:

The power supply system does not work;

The ignition system does not work;

The starting system does not work.

Starting faults

Starter will not turn on.

This could be caused by broken contacts and connections.

Open or short circuit in the starter switching circuits, traction relay malfunction.

If clicks are heard when the starter is turned on, then the reason is in a discharged battery, oxidized or weak contacts on the battery or starter.

Also, the reason may be a malfunction of the holding winding of the traction relay.

If the starter turns on, but the armature either does not rotate or rotates slowly.

The reason is that the battery is discharged, the contact connections are broken, the contacts of the traction relay are burnt, the collector is dirty or the brushes are worn out, interturn or short circuit in the starter windings.

If the starter is engaged, its armature rotates, but the flywheel is stationary.

The cause may be a weakening of the fastening of the starter to the clutch housing, damage to the teeth of the flywheel or drive gear, slipping of the drive freewheel clutch, breakage of the lever, drive ring or buffer spring of the starter drive.

If the starter does not turn off after starting the engine.

The reason is a malfunction of the starter freewheel clutch, sintering of the traction relay contacts. If such a malfunction occurs, the engine must be stopped immediately.