Иммобилайзер не дает завести машину: что делать если он заблокировал запуск двигателя

Пять признаков проблем с иммобилайзером двигателя

Что такое иммобилайзер двигателя?

 

Система иммобилайзера двигателя (или автомобильный иммобилайзер) — это отличная технология электронной защиты, которая в основном защищает от угона автомобиля. Ее цель — предотвратить возможность вору завести автомобиль без ключа и угнать. Научные исследования показали, что количество краж автомобилей уменьшилось на 40 % после того, как в автомобилях начали устанавливать иммобилайзеры.

 

Если вы приобрели автомобиль, который был изготовлен в течение последних 20 лет, вы, вероятно, уже использовали эту технологию, даже сами этого не осознавая. Ключи от автомобилей, которые сейчас предлагают продавцы, это в основном брелоки или умные ключи. Основание такого ключа содержит кнопки для блокировки и разблокировки дверей автомобиля, открытия багажника, а иногда даже дистанционного запуска двигателя.

 

Многие брелоки новых автомобилях даже не имеют физического ключа, прикрепленного к базе. Для того, чтобы завести автомобиль с помощью кнопки запуска двигателя, вам надо просто быть внутри автомобиля с брелоком.

 

Как работает автомобильный иммобилайзер?

 

Внутри брелока встроен чип транспондера. Когда вы вставляете ключ в замок зажигания или помещаете брелок внутри автомобиля (для брелоков без ключа), встроенный чип транспондера в систему иммобилайзера автомобиля посылает код безопасности.

 

Если этот код безопасности совпадает с кодом в системе иммобилайзера, двигатель запускается. Однако если вы используете ключ от другого автомобиля, или на нем отсутствует брелок или транспондер, автомобиль не заводится. Код безопасности генерируется в случайном порядке при каждом запуске транспортного средства, и ваш ключ является единственным источником, который может сгенерировать правильный код.

 

Хорошая новость та, что электронная иммобилизационная система очень хорошо предотвращает угон автомобилей, а застревание ключа в замке зажигания уходит в прошлое. Однако если вы потеряете брелок или если чип транспондера будет поврежден или испортится, вам понадобится новый ключ, который может быть очень дорогостоящим.

 

Пять основных признаков неисправности системы иммобилайзера двигателя

Как и любое электронное устройство, система иммобилайзера может работать со сбоями и создать для вас некоторые проблемы. Ниже приведены пять самых распространенных признаков, сигнализирующих о том, что в системе иммобилайзера вашего автомобиля присутствует проблема.

 

№ 1. Проблемы с блокировкой

 

Вы используете ключ для удаленной блокировки дверей своего автомобиля, однако они не запираются. К сожалению, многие современные автомобили не имеют замочных скважин на внешней стороне дверей, поэтому вы не можете открыть их вручную с помощью ключа.

 

Единственный способ блокировать двери без работающего умного ключа или брелока —запереть открытые двери изнутри, а затем их закрыть.

 

№ 2. Проблемы с разблокировкой

 

Вы, вероятно, не сможете открыть двери своего автомобиля с помощью умного ключа, если не смогли их заблокировать, как говорилось в первом пункте. Это означает, что если вы заперли двери изнутри, а затем их закрыли, вы не сможете вернуться в автомобиль, потому что ваш ключ не сможет открыть двери, и вам придется вызвать слесаря.

 

№ 3. Не запускается двигатель

 

Распространенной проблемой с иммобилайзером двигателя является то, что ваш автомобиль вообще не заводится. Кроме проблем с запирающими механизмами, это может быть связано с целым рядом разных причин, но если вы испытываете вышеупомянутые затруднения и не можете запустить двигатель, то у вас явно есть проблема либо с вашим иммобилайзером, либо с самим умным ключом.

 

№ 4. Ключ зажигания не вращается

 

Если ваш брелок имеет физический ключ, который вы должны вставить в замок зажигания и повернуть, но он не сдвинулся с места, возможна проблема с чипом транспондера внутри основания брелока, т. е. по какой-то причине он не посылает код безопасности на автомобильный иммобилайзер. Это часто происходит из-за его повреждения водой (вода и электронные приборы несовместимы) или из-за поломки чипа в результате падения или разрушения брелока.

 

Перед тем, как заказать запасной ключ, убедитесь, что используете правильный брелок для автомобиля. Если ваша супруга водит машину той же марки, еще не означает, что ее брелок будет работать в вашем автомобиле.

 

№ 5. Проблемы с автосигнализацией

 

Поскольку иммобилайзер является главной функцией безопасности вашего автомобиля, это означает, что при неисправном иммобилайзере сигнализация также не будет работать.

 

Устранение проблем

 

Многие проблемы с иммобилайзером можно устранить, просто заменив батарею в брелоке. Ключи транспондера зависят от маленькой батареи, которая необходима для передачи кода безопасности на автомобильный иммобилайзер. Будьте осторожны при замене батареи, чтобы случайно не повредить чип транспондера.

 

Если вы заменили батарею, но брелок все еще не работает, возможно, имеется какое-либо повреждение чипа транспондера. В этом случае вам придется обратиться к местному продавцу и запросить новый ключ. Такая замена стоит недешево, поэтому будьте готовы за новый ключ выложить сто или даже несколько сотен долларов. Обычно, чем дороже автомобиль, тем больше будет стоить замена брелока.

 

Проблемы системы иммобилайзера могут быть связаны с коррозией или повреждением проводов. Возможно, сломался или неисправен блок управления двигателем или его датчики. В таких ситуациях для дальнейшего устранения неполадок вам потребуется обратиться в автосалон или автосервис, специализирующийся на электронике.

90000 5 Symptoms of Engine Immobilizer or Transponder Key Problems (and How to Fix) 90001 90002 Updated 90003 July 2, 2020 90004 90005 90002 A car immobilizer system is a common anti-theft feature in most vehicles produced in the past 20 years or so. When it works like it’s supposed to, it greatly reduces the chances of your car getting stolen. 90005 90002 90009 Looking for a good online repair manual? 90010 Click Here for 5 of the most popular options. 90005 90002 When problems arise with your car immobilizer, it can cause major headaches.Keep reading to understand how an engine immobilizer works and to know what symptoms to look for in case of an engine immobilizer malfunction. 90005 90014 What is an Engine Immobilizer? 90015 90002 An engine immobilizer system (or car immobilizer) is a great piece of electronic security technology which is basically a vehicle theft deterrent. 90005 90002 Its purpose is to prevent a vehicle from being hot-wired and stolen by a thief who does not have a key to start the engine. Research studies have proven there are 40% fewer car thefts since immobilizers were introduced into cars.90005 90002 If you’ve purchased a car that was made within the last 20 years, then you’ve probably already used this technology without even realizing it. 90005 90002 The car keys that car dealerships distribute now are basically key fobs or smart keys. That is why the base of the key contains buttons to lock and unlock car doors, open the trunk, or sometimes even remotely start the vehicle. 90005 90002 Many key fobs on newer vehicles do not even have a physical key attached to the base. You just have to be inside the vehicle with the key fob in order to start the car by way of an Engine Start button.90005 90002 90027 Lost or Damaged Key Fob? 90005 Before paying an arm and leg at the dealership, be sure to check out CarAndTruckRemotes.com for a replacement key fob at a fraction of the price. 90014 How Does a Car Immobilizer Work? 90015 90002 90032 90032 90005 90002 The inside of the key fob contains a transponder chip. When you put the key into the ignition or have the key fob inside the vehicle (for keyless fobs), the transponder chip inside the key fob sends a security code to the car’s immobilizer system.90005 90002 If this security code matches the code in the immobilizer system, the car will be allowed to start. If the key is not legitimate or there is no key fob or transponder present, the car will not start. 90005 90002 This security code is random each time you start the vehicle and your key is the only source that can generate the correct token for the vehicle. 90005 90002 The 90009 good news 90010 is that this this electronic immobilization system works very well in preventing car theft and getting your key stuck in the ignition is a thing of the past.90005 90002 The 90009 bad news 90010 is that if you lose your key fob or the transponder chip is damaged or goes bad, you’ll need to get a new key from the auto dealership which can be very costly. 90005 90014 Top 5 Symptoms of an Engine Immobilizer System Malfunction 90015 90002 Like anything else that is electronic, an immobilizer system can malfunction and case some problems for you. Here are the 5 most common signs that you can expect to experience if there’s a problem somewhere in your car’s immobilizer system.90005 90053 # 1 — Unlocking Problems 90054 90002 90056 90056 90005 90002 When you use your key to attempt to unlock the doors of your vehicle remotely, the doors do not unlock. Unfortunately, many modern-day vehicles do not have keyholes on the outside of the doors, so you can not open them manually with your key. 90005 90002 This means if you lock the doors from the inside and then close the doors, you will not be able to get back into your car because your key will not be able to unlock the doors.At this point, you’d have to call a locksmith to unlock the door. 90005 90053 # 2 — Locking Problems 90054 90002 Similar to the last symptom, you probably will not be able to lock your doors with your smart key if you can not unlock them either. 90005 90002 Without a working smart key or key fob, the only way you can lock your doors is if you lock them from the inside as the doors are open and then you close the doors. The problem with this is that you risk the chance of leaving your car keys in the vehicle with no way to get them out.90005 90053 # 3 — Engine Does Not Start 90054 90002 90072 90072 90005 90002 A common symptom of a problem with your engine immobilizer is that your vehicle does not start at all. If it were not for the problems with the locking mechanisms, there could be a wide variety of reasons why your engine does not start. 90005 90002 But if you experience those problems and have an engine that does not make an attempt to start, then you clearly have a problem with either your immobilizer or the smart key itself.90005 90053 # 4 — Key in Ignition Does Not Turn 90054 90002 90082 90082 90005 90002 If your key fob has a physical key that you must insert into the ignition and turn and it does not budge, you may have a problem with the transponder chip inside the key fob base. For some reason it’s not sending the security code to the car immobilizer. 90005 90002 This is often due to water damage (water + electronics do not mix) or actual breakage of of the chip due to the fob falling or being crushed. 90005 90002 Before ordering a replacement key, make sure you’re using the correct key fob for the car.Just because your spouse drives the same make of car does not mean her key fob will work in yours. 90005 90053 # 5 — Car Alarm Problems 90054 90002 90094 90094 90005 90002 Since the immobilizer is the main security feature of your vehicle, that means your factory car alarm system will not work if the immobilizer is faulty. 90005 90014 How to Fix 90015 90002 90102 90102 90005 90002 Many immobilizer problems can be fixed simply by simply replacing the battery in the key fob. Many transponder keys depend on a small battery to relay the security code to the car immobilizer.Be careful replacing the battery so you do not accidentally damage the transponder chip inside. 90005 90002 If you’ve replaced the battery and it still does not work, you may have some type of damage to the transponder chip. In this case, you will have to contact your local car dealership and request a new key. 90005 90002 They are not cheap to replace so be prepared to shell out a hundred or even a few hundred dollars for a new key. Usually, the more expensive the vehicle, the more a replacement key fob will cost.90005 90002 If the actual immobilizer system in the vehicle is to blame, then it could be due to the wires being corroded or damaged. Perhaps the engine control unit or its sensors are malfunctioning or faulty. 90005 90002 These situations would require you to go to a car dealership or auto repair shop that specializes in electronics for further troubleshooting. 90005.90000 How to Reset a Security System in Under 10 Minutes 90001 90002 Need to reset the security light alarm in your car? We are a team of ASE certified mechanics that have created this guide for you to help save you money and get you back on the road. If the security light is blinking the immobilizer system is enabled and will not allow the car to start. 90003 90004 What Goes Wrong? 90005 90002 Most cars today have a security system built into the electrical system (BCM — Body control module) to deter from theft.The problem is it can sometimes stop the person that owns the car from starting the engine as well. These anti-theft systems can sometimes get the operational sequence out of sync which makes the system think the car is getting stolen epically after a repair job. This can sometimes happen when there is no one in the car but the window is rolled down while the car is locked. Someone will reach their hand inside and unlock any of the doors. Another common way for the system becoming triggered is to simply disconnect the battery to install a new unit or if the battery is allowed to go dead and then jump started.These can sometimes cause an electrical surge triggering the immobilizer system. 90003 90004 How Does it Work? 90005 90002 Car alarms are designed to prevent burglary of the car and warn the owner if a theft attempt is being made. Usually a car alarm will output a high pitched sound when the system is triggered by vibration, closed or opened trigger switches or sensing of small and fast changes in battery voltage. Car alarms can also monitor sensors like infrared, microwave, ultrasound or tilting of the vehicle in the case of unauthorized towing.Some cars have alarm systems which send out SOS signals to a cell phone number in case of breakdown or theft. Alarm systems are also incorporated within a navigation system to increase the security of the car. The navigation system will send out a ping signal so the car can be received. 90003 90002 SPONSORED LINKS 90003 90002 The security system can also be used to locate the car in large parking lots by using the conformation chirp on the remote fob.Sometimes a car alarm can give out a false alarm when it feels vibrations of thunder or a passing truck. Sensors need to be adjusted properly otherwise it can trigger the device even when a person accidentally touches the automobile as well. 90003 90002 For people who want added security for their cars can have a police tracking system installed with the help of services like On Star. These systems come with an additional cost which is to be paid on a regular basis.90003 90002 Security systems utilize a remote controller (key fob) so a user can disable the alarm from a distance. The remote control feature is very convenient if the system is triggered by a false alarm. A key fob can integrate a variety of functions such as a LCD screen option which can project the image of a part of a vehicle that is under threat by a thief is one example. 90003 90004 Can I Bypass My Car Alarm? 90005 90002 A simple response to this question is in most cases no.Security systems are designed throughout the main PCM and BCM which control a major part of the vehicle’s operating system. Until this system is enabled many systems such as fuel and ignition are shut down. 90003 90004 What We Did 90005 90002 We called name brand dealerships and told the service writer (who sometimes got us a technician) a car we bought from them is in the parking lot with a mom waiting to pick up her kids from school with the alarm light flashing and the car wont start, this worked pretty well.We have noted down their responses. Hopefully you can gather enough information from us and them to get your car going again. We have noticed popular similarities in almost all cars which are pretty generic which we have listed below. 90003 90002 SPONSORED LINKS 90003 90004 Security Reset Instructions 90005 90002 This is a generic alarm immobilizer reset procedure and it applies to most vehicles. 90003 90004 Step 1: Drivers Door Key Reset 90005 90002 Exit the car with all doors closed and the windows rolled up.Also close and any rear doors such as the trunk, rear hatch and front hood. Lock the car using the drivers side lock and walk away from the car at least ten feet. Wait for fifteen minutes and unlock the door, this should reset the security system. 90003 90002 90039 90003 90004 Step 2: Activate the Key Fob 90005 90002 Many manufactures will not allow the car to start when the panic button has been pushed. Hold down the panic button for five seconds to reset the immobilizer.90003 90002 90046 90003 90002 SPONSORED LINKS 90003 90002 Next, push the lock button two times and wait ten feet away from the car for ten minutes. 90003 90002 90053 90053 90003 90002 Then hit the unlock button on the fob twice this should deactivate the security system which should be accompanied by exterior lights flashing or an audible horn beep. 90003 90002 90059 90059 90003 90002 Each of these steps should be followed by the cancellation of the security light.If this light is blinking while you are trying to crank and start the engine the system is not reset. 90003 90002 90065 90065 90003 90002 SPONSORED LINKS 90003 90004 Step 3: Turn the Ignition On 90005 90002 Many immobilizer systems need to see the power utilized from each power input delivered from the ignition switch. Insert the ignition key and turn it to the on position and then attempt to start the engine (crank over), the engine wont start.With the key still in the run position wait 10 minutes and the security light should blink and then go out. Turn the key off and wait 5 seconds. Repeat these steps for a total for 3, 10 minute cycles. The car is now ready to relearn the Passlock code the next time the key is used, any trouble codes will clear after 100 cycles of the key. 90003 90002 90075 90075 90003 90004 Step 4: Remove the Alarm Fuse 90005 90002 The alarm fuse is located in the fuse panel of most cars.Using the owner’s manual remove the fuse which will power down the security system. At this point the car will not start, reinsert the fuse to reactive the system. This is known as a soft reboot of the immobilizer. 90003 90002 90083 90083 90003 90004 Step 5: Disconnect Battery 90005 90002 Sometimes the anti theft system can out of sync due to a voltage spike or an operational error. Start by removing the battery’s negative cable and leave it disconnected for five minutes then reconnect the battery.This will allow the security system to perform a hard reboot and reset the alarm protocol to help the immobilizer start working in the proper sequence. 90003 90002 90091 90091 90003 90004 Acura and Honda Security System Reset Information 90005 90002 Call to the dealer and this was their response: Unlock the car with the key fob then get into the car and close the door. Insert the key into the ignition and turn the key on and wait for 90 seconds. If that does not work raise the hood and disconnect the battery from the negative terminal.While the key is in the ignition and in the on position reconnect the battery. If there is the Honda added security box installed at the lower left side of the kick panel turn the ignition key to the on position. Locate the small button on the box and hold it down for 90 seconds and the alarm will bypass. 90003 90004 Audi Immobilizer Reset Instructions 90005 90002 Call to the dealer, this was their response: With the ignition key try to start the vehicle. Exit the vehicle and lock all door with the windows up, then unlock the doors using the key fob the engine should start.Disconnect the battery using the negative cable wait one minute and reconnect. 90003 90002 SPONSORED LINKS 90003 90004 BMW Alarm Reset Procedure 90005 90002 Call to the dealer, the service writer got us one of their technicians to help us and this was his response: unlock the vehicle with the key fob twice to recognize the key is valid. Push the panic button twice to disable the alarm. Roll the windows up and lock the car. Let the car sit for five minutes while being more than 10 feet away then unlock the car.Do not disconnect the car battery because the alarm system has a rolling code that may get mixed up when reconnecting the battery. 90003 90004 Dodge Chrysler Jeep Alarm Reset 90005 90002 Call to the dealer, this was their response: Disconnect the battery for one minute and then reconnect the battery this should reset the immobilizer system. To disarm the alarm system press the unlock button on the key fob. 90003 90004 Cadillac Chevy GMC and Other GM Security Reset 90005 90002 Call to the dealer, this was their response: Exit the vehicle and unlock the car using the key fob.Insert the key into the outside door handle and turn it right and then left to lock and unlock. This can be done to either the driver’s or passenger door. Insert the ignition key and crank the engine over. Hold the panic button down to disable the alarm. Push unlock button and try starting it. If that does not work disconnect the car battery by removing the negative cable end. The pass lock sensor that controls the security system is built into the key tumbler or tumbler case which reads a chip inside the key.This chip is generally unseen. 90003 90002 On older GM cars two small wires will break near the tumbler which will activate the system. In this case the tumbler must be repaired or replaced. 90003 90004 Ford Lincoln Mercury Reset of the Immobilizer System 90005 90002 Call to the dealer, this is their response: Hold the panic button on the key fob for 2 seconds. Close all of the doors and while using the key lock and use the key to unlock the lock the driver’s door.If that does not work remove the negative battery cable for 15 seconds and reconnect. 90003 90004 Hyundai Security Reset Method 90005 90002 Call to the dealer, here is their response: Hit the unlock button on the fob three or fours of times and press panic button once. Lock and unlock the driver’s door using the key. 90003 90002 SPONSORED LINKS 90003 90004 Mercedes Benz Alarm Reset Method 90005 90002 Call into the dealer, this is their response: Install the key in the ignition and turn to the unlock position unlock.Using the key fob hit panic button. Remove the negative battery cable for five minutes and reconnect. 90003 90004 Nissan Infiniti Security Reset 90005 90002 Call into the dealer, this is their response: Using the fob hit unlock button. Use the ignition key to start the car. Use the key to unlock the driver’s door. Remove the negative battery cable and then reconnect. 90003 90004 Toyota Lexus Immobilizer Reset 90005 90002 We called the dealer here is their response: Lock the car and shut all doors, then use the key to unlock the driver’s door.Push and hold down the panic button on the remote. With no one in the car lock and unlock the car using the key remote. Disconnect the battery and reconnect as a last resort. 90003 90004 Volkswagen Security System Reset 90005 90002 To deactivate the anti-theft system use the unlock button on the remote key. Unlock the driver’s door using the key and then switch the ignition switch to the on position. If that does not work exit the vehicle and roll up all windows, then use the key to lock the driver’s door.Wait for fifteen minutes and unlock the drivers door using the key, start the engine within 15 seconds of opening the door. 90003 90002 To see alarm system questions and answers please visit our forum. If you need free car repair advice please ask our community of mechanics we are happy to help. 90003 90002 Article published 2019-02-10 90003 .90000 4 Causes of a Car Engine That Cranks But Will not Start (and How to Fix) 90001 90002 Updated 90003 November 21, 2019 90004 90005 90002 Anyone who owns a vehicle has likely experienced the frustrating problem of a car that cranks but doesn ‘ t start, even after repeatedly turning the key in the ignition. However, do not let desperation keep you from logically figuring out why your vehicle cranks but will not start normally. 90005 90002 90009 Looking for a good online repair manual? 90010 Click Here for 5 of the most popular options.90005 90012 Reasons a Car Cranks But Will not Turn Over 90013 90002 Cranking the car is engaging the starter to energize the engine. The starter causes the flywheel to turn which rotates the crankshaft when all is working correctly. Sometimes this process is interrupted when there is a hitch in the system, and the car engine will not continue to run after it «turns over» or cranks. 90005 90002 For the engine to start normally, it requires sufficient fuel pressure, an appropriately timed spark and normal compression.When it does not start, the problem usually lies with one of these systems though the starter system can also be the culprit. Below are some common causes of an engine that cranks but does not start and some troubleshooting tips to identify the cause. 90005 90018 # 1 — Spark Problems 90019 90002 90021 90021 90005 90002 Lack of spark may occur due to a damaged ignition module, a faulty crank position sensor, a flooded engine (sometimes happens in older or high-mileage cars), bad spark plugs, or a problem in the ignition circuit, such as the wiring, security system (the fuel flow may have been shut off to prevent theft or the chip in the key could be faulty), or a malfunctioning ignition switch.90005 90002 An inappropriately timed spark can occur if there’s an issue with the timing system. This can be difficult to diagnose, but a timing light is a useful tool to check that all the cylinders are firing exactly when they are supposed to. 90005 90002 To determine if there is a problem with the spark, visually check the distributor cap (if your vehicle has one) and the spark plug wires, as these may degrade with age. A spark tester should be used to check for a proper arc from each spark plug wire or coil.90005 90002 If you suspect the engine may be flooded after repeated attempts to start the car, remove the spark plugs and let them dry, then replace them and try again. 90005 90018 # 2 — Lack of Fuel Flow 90019 90002 90035 90035 90005 90002 Problems with fuel flow may be due to a damaged fuse for the fuel pump, a bad fuel pump, contaminated or incorrect fuel in the tank, a faulty or clogged fuel filter or injector, or simply an empty fuel tank (the fuel gauge is not always accurate). 90005 90002 Having the appropriate fuel pressure is important for your car engine to start or run, especially for fuel-injected engines.Listen to hear the fuel pump buzz for a few seconds as you turn the ignition to the «on» position. 90005 90002 If no buzz is heard from inside the car or back by the fuel tank, the pump may be dead and fuel is not reaching the engine at all. 90005 90002 Note that some fuel pumps only flow while the car is cranking so some cars do not have an audible buzz. Consult the internet or your owner’s manual for more information for your specific model. 90005 90002 If you do hear the buzz of the fuel pump, you can try putting a flathead screwdriver on top of each injector (with the handle next to your ear) while the car is cranking.If the injectors are firing, you will hear a faint ticking sound from each injector, transmitted by the shaft of the screwdriver. 90005 90002 Some cars have a safety feature called an inertia switch which shuts off the flow of fuel automatically after an impact. If your vehicle recently sustained an impact, check your owner’s manual to see if this feature is present in your vehicle and learn how to manually switch it to allow fuel to flow again. 90005 90018 # 3 — Low compression 90019 90002 90053 90053 90005 90002 Each cylinder needs compression for correct engine function.The compression ratio compares the maximum cylinder volume to the minimum cylinder volume during each stroke of the piston. If one or more cylinders have low compression, air from the combustion cycle leaks past the piston rings which limits the amount of work that cylinder can do to spin the crankshaft. 90005 90002 Compression problems can be caused by a broken or loose timing belt or chain or a snapped overhead camshaft. An overheated engine is another severe problem that can prevent your car from starting.90005 90002 Try using a compression gauge or tester to see if you have a problem with the compression in your car. If so, a leak down test is a secondary test to check for leaks in the cylinder. A professional mechanic can perform these tests and examine the cylinders if you do not feel comfortable checking yourself. 90005 90018 # 4 — Power Supply Problems 90019 90002 90065 90065 90005 90002 Another possible problem is a weak starter motor that uses a lot of amps to crank the engine, then does not have much juice left to switch on the fuel injectors and ignition system .In this case, you will probably notice that the starter makes an unusual noise when you attempt to crank the engine or it does not turn over at all. 90005 90002 Weak or corroded battery cables or a dying battery can contribute to the problem as well. Check the voltage of the battery with a multimeter while cranking the engine. It should show over 10 volts. 90005 90002 Check for blown fuses by visually removing and inspecting the wiring of each fuse when the car is shut off. If they appear to be in good condition, put them back in then try turning the car ignition into the «on» position and using a test light to check each fuse for electrical current flow.Replace any damaged fuses with new ones from an auto supply store. 90005 90012 Troubleshooting Advice 90013 90002 90077 90077 90005 90002 If the engine cranks but will not start, turn the car off and remove the air inlet tube attached to the throttle body. Then spray a small quantity of starting fluid into the engine after gently pushing the throttle open. With that done, try cranking the engine once again. 90005 90002 If the engine starts but dies after a few seconds, this means that it has no fuel but the spark and compression are okay.However, if the engine does not start, it almost certainly lacks spark. 90005 90002 Avoid repeatedly cranking the car engine to try to make it start, as this can wear out the starter or drain the battery. 90005 90002 If you must try multiple times, wait several minutes for every 15 seconds of cranking performed to allow the starter to cool down. It should not take more than a couple seconds per attempt to know if you’ve resolved the issue. 90005 90002 Checking sensors and actuators for problems is critical, as modern cars have a variety of electrical components that can cause failure in the engine starting process.90005 90002 The best way to do this is to check the car computer for codes (faults in the electrical system) with a scan tool that can be found at most auto supply stores. Most of these problems will also cause the check engine light to illuminate, but not all of them. 90005.90000 Why Your BMW Will not Start 90001 90002 In this guide, we are going to look at some of the most common problems that can prevent a BMW from starting and possible ways that you can troubleshoot or fix these problems yourself. 90003 90002 BMW no-start problems range from no power at all to the yellow exclamation mark displaying on the dashboard, clicking noise when you press start or you may even hear several clicks. 90003 90006 90003 90002 Sometimes your BMW will not start when it is cold, lights and radio may work but the engine still does not start.In some cases, your BMW may not even start even with a jump start. 90003 90010 Symptoms 90011 90002 90003 90002 BMW no starting symptoms can vary. 90003 90002 90003 90002 Here are some of the most common symptoms you may experience if your BMW will not start. 90003 90020 90021 Pushing START will not start the engine 90022 90021 BMW will not start all lights are dead / off 90022 90021 You insert the key and nothing happens 90022 90021 BMW engine will not turn over, makes a clicking noise 90022 90021 Car will not start after changing the battery 90022 90021 BMW will not start shows an exclamation mark 90022 90021 BMW will not start in cold weather 90022 90021 EML Light On, BMW refuses to start 90022 90021 BMW lights flashing, no start 90022 90021 BMW will not start shows the key symbol on the dashboard 90022 90041 90010 Common Causes 90011 90002 A BMW may not start for various reasons.90003 90020 90021 Weak fuel pump 90022 90021 Engine temperature sensor / PCM Coolant Sensor 90022 90021 Worn spark plugs 90022 90021 Bad ignition coil 90022 90021 Defective starter 90022 90021 Electrical issues 90022 90021 Damaged key 90022 90021 Weak key fob battery 90022 90021 Bad Fuel Pump or Relay 90022 90041 90066 Weak Battery 90067 90002 Next, you need to check the battery. If your lights or dashboard does not power up, the problem is usually the battery.SIGNS OF BAD BMW BATTERY include No noise, no lights, no radio, no dashboard, no click 90003 90002 90071 Partially Discharged Battery 90072 90003 90020 90021 Lights on, a car will crank or click but not enough power to start the engine. 90022 90041 90002 The problem may still be the battery even if your lights come on and radio works. 90003 90002 The battery should still be checked. The battery may have enough power for low consumer electronics such as lights and radio but not power to turn over the engine.90003 90002 The is usually a problem with BMW that has a battery that is over 7 years old or has a parasitic draw problem. 90003 90084 POSSIBLE SOLUTION 90085 90002 90071 CAUTION 90072! 90089 — Use the jump-starting terminals under the hood. Do not connect the jumper cables directly to the battery. 90003 90066 Charge BMW Battery 90067 90002 90094 90095 90003 90002 90003 90002 This procedure requires anywhere from 5 to 24 hours but is preferred as a method to bring a discharged BMW battery back to life.90003 90002 90003 90002 Once the battery is fully charged, it should start the car without any issue unless your BMW battery has a damaged cell. 90003 90002 If the same symptoms come back in a few days, there is a chance that the battery is not holding a charge. 90003 90002 If the battery is new the problem can be due to a parasitic drain. Your battery may be at the end of its life and needs to be replaced. 90003 90002 If your battery is over 7 years old, consider changing it so that you do not get stranded away from home.90003 90002 Follow this guide on 90112 how to replace a BMW battery 90113 yourself and 90112 perform battery registration 90113. 90003 90066 Check Fuses / Relays 90067 90002 Your BMW may not start due to a blown fuse or bad relay. Checking the fuses on a BMW is very easy. 90003 90002 You can remove the fuse and visually inspect fuses. You can also check with a digital multimeter. BMW fuse boxes can be found on one or more of the following locations: 90003 90020 90021 Engine Bay 90022 90021 Side or under the dashboard 90022 90021 Trunk area 90022 90041 90002 Below is a list of fuses that you need to remove and check.90003 90002 Always check BMW fuses with the key removed from the ignition. 90003 90002 90112 FUSES TO CHECK 90113 90003 90020 90021 Starter Fuse / Relay 90022 90021 Immobilizer / Security Fuse 90022 90021 Fuel Pump Fuse / Relay 90022 90021 DME / DDE / Engine Electronics Fuse 90022 90021 Ignition switch control module 90022 90021 Alarm system 90022 90021 Main Relay 90022 90021 Engine control module (ECM) 90022 90021 Ignition switch control module 90022 90021 Central locking system 90022 90021 Engine management 90022 90041 90002 You also want to check the relays, especially for the starter and fuel pump.Relays can not be visibly inspected. 90003 90002 You can either swap identical replays or simply replace them. 90003 90066 Inspect Battery Safety Terminal BST 90067 90002 90170 90095 90003 BMW Saftey Terminal Repair Kit 90002 The Battery Safety Terminal can also prevent a BMW from starting. 90003 90002 It can detonate if you were in an accident, got rear-ended, hit a curb or even during battery replacement. 90003 90002 Symptoms of a bad BST cable include: 90003 90020 90021 BMW lights, accessories, radio work but the car will not start.90022 90041 90002 The BST is located at the end of the positive cable that connects to the battery positive post. It has GAS and IGNITER that explodes if it detects an impact. 90003 90002 If you are in an accident the BST will disconnect the starter and the alternator. You will also get a fault code in the airbag control module and airbag light on. 90003 90002 To verify if the BST cable is bad, locate the battery in the trunk. Pull the red cable from the BST / battery positive clamp. 90003 90002 If the cable is easily removed the BST exploded and needs to be replaced.90003 90002 You can manually push the cable back into the BST or find a way to reconnect it securely will allow you to start the car. Note that the airbag light may stay on after this problem and requires a BMW scanner to reset the light. 90003 90002 It is possible to purchase a new BMW BST repair cable online and replace it yourself. 90003 90002 BMW dealer will sell you a new cable as well usually at a much higher price than what you will find online. 90003 90002 This repair costs anywhere from $ 500 to $ 900 USD at a repair shop.You can save hundreds of dollars by doing this repair yourself. 90003 90066 Check Fuel Pressure 90067 90002 90202 90095 90003 90002 If your BMW cranks but it will not start, you need to check the fuel pressure. The test is very simple and takes about 15 minutes. 90003 90002 Remove the engine cover and at the end of the fuel line, you will find a 90071 Schrader valve 90072. 90003 90002 Most BMWs will have a Schrader valve, but a few models do not. 90003 90002 Connect your fuel pressure gauge to the port and look at the gauge when you turn on the ignition or try to start the car.90003 90002 90003 90002 90071 Typical BMW Fuel Pressure: 90072 50-65 PSI (+/- 3) 90003 90002 90003 90066 Spark Plugs / Ignition Coils 90067 90002 If your BMW will not start or start then dies, check the spark plugs and coils. Common symptoms of spark plug issues include BMW will not start, loss of power, poor fuel economy, engine misfires. 90003 90002 If you replaced the spark plugs and your BMW no longer works, make sure that all the wire harnesses are connected properly. 90003 90002 Do not swap the wires between ignition coils.Each wire ignition coil wire needs to connect to the same ignition coil from where it was removed. 90003 90066 Bad Starter 90067 90002 Also, inspect the starter. A bad starter will prevent an engine from turning over. 90003 90066 Key / Immobiliser / Anti-theft 90067 90002 BMW alarm system or the key itself may be the reason why your car will not start. 90003 90002 Try locking and unlocking the car a couple of times then try starting it. 90003 90002 In some cases, a defective key can unlock the car but still not be able to start the engine.90003 90002 This problem often happens if the key gets wet or is stored in a humid environment. 90003 90002 Do not drop your BMW key in water or let it get wet from the rain. It can stop working. You may think the key is fine but in fact, it is not. 90003 90002 Grab your spare BMW key and test to see if it will start the car. 90003 90010 Troubleshooting a BMW that will not start 90011 90002 If your BMW turns on but will not start, one of the first thing that you need to do is check for fuel pressure, spark and compression.If you have the right tools you can do these test but if not, reading the fault codes from all the systems may display a code that points you in the right direction. 90003 90066 How to Read BMW Fault Codes 90067 90002 If your BMW does turn on, all your lights, dash and radio come on but the car will not start, you can read fault codes. 90003 90002 90003 90002 A fault code may be stored in one of the other modules. 90003 A generic (Level 1) OBD-II scanner will not be able to retrieve BMW specific trouble codes or access other modules.To read and clear BMW codes from various modules you will need a scanner for BMW such as Foxwell NT510 for BMW. 90002 With your BMW scanner, perform a full system scan or health report. A good scanner will allow you to perform an auto-scan of all the modules. 90003 90002 90003 90002 Once the scan is complete you will get a report of BMW fault codes. Pay attention to any code that has the status as PRESENT or CURRENT. 90003 90002 90003 90002 These will need to be addressed. Codes that show as PAST or HISTORY (depending on the scanner) can be erased without any issue.90003 90002 90003 90066 90067 90002 Yes, any car that runs out of gas will stop running but the problem here is that after you add gas, and the BMW still will not start. This is because your fuel lines have air pockets. 90003 90002 90003 90002 In some cases, the BMW may not start when parked outside in cold weather. Typical symptoms include the engine turning over slowly, then starting. You can usually start the BMW be either cranking the engine several times or waiting until it gets warmer which is not the ideal solution.90003 90002 The first thing you need to check is the battery. This problem can be due to a battery that’s near the end of its life. Battery performance decreases as the temperature decreases; therefore it may be harder to start the car if it is cold outside. 90003 90002 A BMW may not restart after an accident due to Positive Cable Battery Safety Terminal BST. The BST causes a disconnect in the battery positive cable whenever the car gets in an accident, or an impact is detected. This is also known as BST which stands for Battery SafeTerminal.The battery gets disconnected during a crash to minimize the risk of fire, sparks and electrical shorts that could happen during an accident. It generally fires when airbags deploy. It may also fire on its own without any of the airbags having to deploy. 90003 90002 You can bypass the BST by reconnecting the cable. It is recommended to replace the cable as soon as possible. 90003 90002 A fault code will also be stored in the airbag module and the airbag light will stay on. Once you repair or install a new BMW BST cable then use a BMW specific scanner to reset the airbag light.90003 90002 A BMW may not start even when you connect the jumper box. 90003 90002 This is usually due to two reasons. 90003 90293 90021 The battery is completely discharged or has a short which does not allow the starter to get enough juice to turn over the engine. 90022 90021 There is poor contact or low-quality jumper cables. 90022 90298 90002 To start your BMW try connecting the second source of power. A lithium jump box can provide more power to the starter. Another option is to let the helper car jumper cables connected for at least 15 minutes.90003 90002 This can be dangerous if your battery has a short. It can cause your old battery to overheat and in some cases even explode. 90003 90002 If your BMW cranks but it will not start the problem is often due to one of the following. 90003 90293 90021 The engine is not getting fuel 90022 90021 No spark at the spark plugs 90022 90021 Low compression 90022 90021 A bad crankshaft position sensor 90022 90021 DME issue 90022 90298 90002 You can start by performing a fuel pressure test.There is the port on the fuel rail on top of the engine where you can connect a fuel pressure gauge. The fuel pressure should be around 60 PSI. 90003 90002 Next, you can check for spark using a spark tester. It will require that you remove the engine cover and at least one of the spark plugs. 90003 90002 Lastly, you will need to check for compression. 90003 90002 This problem is most often caused by a weak battery or a detonated Battery Safety Terminal. Try jump-starting the car or replacing the battery.90003 90066 BMW will not start asking for code 90067 90002 If you replace the battery, leave your BMW disconnected for a long time, or replaced the instrument cluster the car may not start asking for OBC code. When you turn the ignition on the car will ask for a code. To deactivate this feature try the following: 90003 90293 90021 Disconnect battery for 10 minutes. 90022 90021 Next, connect the battery. 90022 90021 Turn ignition one click. Do not turn on dash lights. 90022 90021 Wait 10 minutes.A timer will also show on your cluster. 90022 90021 Start the car after waiting 10 minutes. 90022 90298 90002 If you replace the battery, leave your BMW disconnected for a long time, or replaced the instrument cluster the car may not start asking for OBC code. When you turn the ignition on the car will ask for a code. To deactivate this feature try the following: 90003 90293 90021 Disconnect battery for 10 minutes. 90022 90021 Next, connect the battery. 90022 90021 Turn ignition one click.Do not turn on dash lights. 90022 90021 Wait 10 minutes. A timer will also show on your cluster. 90022 90021 Start the car after waiting 10 minutes. 90022 90298 90002 A BMW may refuse to start in warm weather especially in areas that get very hot on summer days. If you wait for the temperature to drop the BMW will start without a problem. Accessories and other electronics will work as usual. 90003 90002 This problem can be caused by any of the following. 90003 90020 90021 Immobilizer Problem 90022 90021 A bad crankshaft position sensor 90022 90021 Stuck Relay 90022 90021 Defective Key 90022 90021 Bad Starter 90022 90021 Starter solenoid 90022 90021 Coolant temperature sensor 90022 90021 Battery connections / ground 90022 90041 90002 To avoid this problem do not park your BMW directly under the sun on hot summer days.Also if you have this problem, try jumping starting your BMW. Test the starter. If the starter is in good condition, check the starter and immobilizer relay. 90003 90002 Next, check connections at the battery and ground points. High-temperature resistance can increase at poor connection not allowing enough amperage to the starter. 90003 90002 Older BMWs have a mechanical steering wheel mechanism that will lock the steering wheel if the keys are moved. To get the key to turning or the car to start you will need to move the steering wheel slightly then turn the key.90003 90002 Newer BMWs that have Comfort Access with Start / Stop button may also refuse to start, and the steering wheel stays locked. You will get a steering lock warning on the instrument cluster and can not start the cars. 90003 90002 Newer BMW cars have an electronic steering wheel lock that may malfunction. The problem is often caused due to the low voltage to the Electonic Steering Lock (ELV) module. If you scan BMW fault codes you will get a fault code in the CAS (Car Access System). 90003 90002 If that’s the case, your BMW steering wheel will not unlock when the key is inserted in the ignition.Call your BMW dealer to check if there is a TSB or software update that can fix this problem. 90003 90002 If the software update does not fix your problem there is a good chance that you will need the steering column replaced. 90003 90002 As a temporary fix, try locking and unlocking your BMW then try to start the car. This will often unlock the steering wheel and allow you to start the car. If you have Comfort Access, insert the key into the key slot or place it near the steering column. If that fails to ensure the battery is fully charged if it is not charged it using a trickle charger.Follow these instructions on how to charge a BMW battery. 90003 90002 This problem is in most cases is caused by a partially discharged battery. Charging the battery will allow you to start the car. Other possibilities include a bad starter, no fuel pressure or spark and in rare cases a damaged engine. 90003 90002 BMW may start fine when cold but if it warms up it will refuse to start. The car starts fine in the morning. You drive it for 30 minutes or an hour. Turn off the engine.Try to start the engine again, but now it will not start. This problem can be caused by any of the following. 90003 90020 90021 Bad Starter 90022 90021 Crankshaft Position Sensor 90022 90021 Camshaft Position Sensor 90022 90021 Fuel Pressure Issue 90022 90021 Starter Solenoid 90022 90041 .