What s the matter with my 05 BMW 750 sometimes hitting the motor and not responding?

At present, most of the vehicle starting system is controlled by the ECU of the electronic control unit, and the first thing to check when the starter does not respond is whether there is a problem with the control circuit of the starter. Most starters have a starting relay, if you can hear a "pop" sound at the moment of starting, it is the sound of the starting relay sucking, indicating that there is no problem with the control circuit of the starting system. Then it is necessary to check whether there is a broken circuit between the starter and the battery, of course, the battery is to ensure that there is enough voltage, the voltage is low, the starter will turn but will be weak, and the sound can be heard.

Of course, if the battery is dead or broken, the starter will not turn. Finally, it is the problem of the starter in this province, which is generally the assembly part and replaces the entire starter. If the starter comes with a starting relay or the vehicle control line has a relay installed, it is recommended that you do not add a relay.

Because it involves the matching and quality of the relay. If the matching is unreasonable, it will be released at the moment of starting, which will cause damage to the starter and flywheel ring gear. If the quality is not up to standard, relay problems such as contact sticking occur, which will cause the starter to burn out due to long-term operation.

Generally, there are three situations, one is that the battery itself is out of power, because the time is relatively long, so the battery may have self-discharge or the electrical appliances on the car have discharged, and the battery power is empty, so the vehicle can not start normally. You can find a battery and try it. The second is that the motor is faulty, because the vehicle is powered to the motor, in order to drive the motor to start, if the motor can not work normally, there will be no starting problem, of course, the third is that the connection line at the back end of the motor will fall off will also form this situation.

It is advisable to check these three aspects on the go.

Sometimes the motor does not respond to the starting car, first see if the battery has electricity, if there is no response in the case of electricity, it is a problem with the motor, it is recommended to maintain the motor. It is possible that the suction switch of the motor is broken. It's good to change it.

What's wrong with my BMW 750li hood not opening! I don't have time to go to the 4S store!! Hurry 06 750 hood from the cab can not be opened, the first step to remove the left front tire, fenders inch, 2 after removing, from the position under the left headlight can see the left cover lock cable, and then it is very simple, an ordinary repairman knows how to get it at a glance.

If the 750 hood in 06 can't be pulled from the cab, step 1 remove the left front tire, the inner inch of the fender, 2 after dismantling, you can see the left cover lock cable from the position under the left headlight, and then it's very simple, an ordinary repairman knows how to get it at a glance.

The BMW 750 motor drill is not on fire, and the reason is about three parts of the following acres. One is that the oil circuit part of the oil circuit is not supplied with oil, and the high-pressure pump does not inject oil. The second is that the circuit high-voltage envelope coil does not generate high voltage.

Do not take the gasoline power supply of the atomized sail sprayed by the high-pressure pump. The solenoid coil of the drill motor in the third motor state does not drive the mechanical gear charge, so the internal combustion engine does not rotate. All three conditions are indispensable.

Hello, this Jian Yan cracked shirt is a smart fan, such as your car, the water temperature is now 90, then it is the time for the fan to start, if the fan does not turn unrestrained, then you have to see, on the fan plug, whether there is a bit of pressure change, if there is, change the fan, if there is, then you have to look at the insurance,

The reason why the car has electricity and oil but cannot ignite is: aging of the fire divider, damage to the distributor, broken spark plug, loose connection of the low-voltage circuit, etc.

1. Whether the steering wheel is in a deadbolt state. The solution is simple, as long as you hit the steering wheel hard and twist the key at the same time, you can generally unlock the steering wheel lock quickly, and the ignition is an instantaneous thing.

2. Did you not return the gear to P gear when you parked? Think about it, if the D or R gear can be ignited, the jump of the vehicle at the moment of ignition is undoubtedly a huge safety hazard. Therefore, for automatic transmission vehicles (AT, CVT, AMT), manufacturers will preset this mode, and repeatedly inform in the manual:

Make sure the gear is in the P position when ignition.

3. One-button start sometimes encounters the trouble of power loss of the smart key, obviously the key is in the car, but the instrument always shows 'key matching error', this situation is likely to be the power loss of the smart key, and the start system can not sense the weak radio waves emitted by the key. Therefore, it is recommended to pick up the smart key and put it on the start button, and then press the button to start.

4. Check whether the battery has electricity. If the ignition is not ignited, it may be due to the loss of power or the expiration of the battery life due to the long-term headlights have not been turned off, and the battery is generally replaced in time according to the maintenance manual.

5. See if there is oil. If the fuel gauge shows that it is below the red line, it will not ignite. At the same time, pay attention to the quality of the oil. There have been car owners who found that there was water and mud in the fuel tank after disassembling the car, and with such oil, it is impossible for the car not to break.

1. Out of fuel: The fuel gauge shows that it is below the red line, so it will naturally not catch fire;

2. The battery is out of power: It may be due to the loss of power or the expiration of the battery life caused by the long-term headlights not turned off, and it is generally recommended to replace the battery in time after 2 years. In addition, the installation of xenon headlights, high-power audio, etc. are also the causes of vehicle circuit failures.

The situation of the vehicle without power is easy to check, just press the horn to know.

3. The gear is not right: when the automatic transmission car starts, the gear must be placed on the P or N gear, if it is placed on the R or D gear, it will not ignite. There are also some manual transmission cars that will not catch fire if you don't step on the clutch.

4. There may also be motor failure, or oil pump supply, fuel injector problem, sensor failure, etc., and these more complex situations need to be dealt with by professionals.

The BMW 750 generator does not generate electricity, and the oil level does not show possible fault phenomena:

1) It may be a circuit or electronic fault. The phenomenon that occurs is very sudden and without warning. The faults of the circuit are:

The fuse is blown out, the high-voltage coil is broken, the low-voltage circuit is broken, the center ignition wire is off, the distributor head is leaking, and the spark plug is damaged. Electronic failure mainly refers to the loss of function of the computer control board.

Oil pump failure, oil circuit failure, oil filter blockage, carburetor failure, nozzle damage, etc. Sometimes it happens that the fuel tank is empty and the owner doesn't know about it. Add a few liters of petrol and you'll be able to solve all the problems.

3) It may be a mechanical failure. Common mechanical failures are: time band (chain) breakage, cylinder leakage without pressure, etc.