DTC U0029:
Неисправность мультиплексной линии F-CAN
ПРИМЕЧАНИЕ: Убедитесь, что прибор HDS соединен с системами автомобиля и ECM/PCM. Если нет, осуществите поиск неисправностей в цепи DLC:
-
Сотрите коды неисправности DTC с помощью HDS.
-
Поверните ключ зажигания в положение LOCK (0), а затем в положение ON (II).
-
Подождите 6 секунд или дольше.
-
Проверьте при помощи HDS, записаны ли в память какие-либо коды неисправностей.
Выводится ли код DTC U0029?
|
ДА |
— |
Перейдите к . |
|
НЕТ |
— |
Пропадающая неисправность, на момент проверки система исправна. Проверьте надежность контакта и соединений проводов, а также изношенные/замкнутые провода. Если цепи исправны, проверьте состояние аккумулятора и зарядной системы.■ |
-
Поверните ключ зажигания в положение блокировки «LOCK» (0).
-
Отсоедините соответствующие разъемы от каждого блока управления в таблице. Сотрите все коды DTC, затем, после отсоединения каждого блока, проверьте коды DTC заново.
Электронный блок управления
Разъем
Компьютер ECM/PCM
Двигатель R20A3: Разъем А (44P)
Двигатель K24Z3: Разъем А (49P)
Блок подушек безопасности (SRS)
Разъем А (39P)
Модуль управления приборами
32P разъем
Блок модулятора давления VSA,
32P разъем
Навигационный блок
*1
32P разъем
Блок управления EPS
28P разъем
Датчик курсового угла/поперечного ускорения автомобиля
разъем 4Р
Блок управления АСС
*2
20P разъем
Блок Е-преднатяжителя
*2
Разъем В (14P)
Блок LKAS
*3
Разъем 26Р
*1:
С навигацией
*2:
С ACC
*3:
С LKAS
Код DTC U0029 указан с каждым отсоединенным блоком по отдельности?
|
ДА |
— |
Перейдите к . |
|
НЕТ |
— |
Замените блок управления, который был отсоединен, когда код DTC U0029 не обнулялся.■ |
-
Поверните ключ зажигания в положение блокировки «LOCK» (0).
-
Отсоедините каждый разъем блока управления в таблице.
Электронный блок управления
Разъем
Компьютер ECM/PCM
Двигатель R20A3: Разъем А (44P)
Двигатель K24Z3: Разъем А (49P)
Блок подушек безопасности (SRS)
Разъем А (39P)
Модуль управления приборами
32P разъем
Блок модулятора давления VSA,
32P разъем
Навигационный блок
*1
32P разъем
Блок управления EPS
28P разъем
Датчик курсового угла/поперечного ускорения автомобиля
разъем 4Р
Блок управления АСС
*2
20P разъем
Блок Е-преднатяжителя
*2
Разъем В (14P)
Блок LKAS
*3
Разъем 26Р
*1:
С навигацией
*2:
С ACC
*3:
С LKAS
-
Отсоедините систему HDS от разъема передачи данных.
-
Проверьте, есть ли соединение с «массой» клемм № 21 и № 22 32Р разъема модуля управления приборами по отдельности.
Непрерывно ли соединение?
|
ДА |
— |
Замыкание на «массу» в проводе.■ |
|
НЕТ |
— |
Перейдите к . |
Расшифровка ошибки U0029/107 у Honda: Неисправность F-CAN (BUS-OFF (Модуль управления двигателем (MCM)) (ГИБРИДНЫЕ МОДЕЛИ)
Марка:
Honda
Код:
U0029 / 107
Определение:
Неисправность F-CAN (BUS-OFF (Модуль управления двигателем (MCM)) (ГИБРИДНЫЕ МОДЕЛИ)
Описание:
При включенном зажигании и напряжении источника питания MCM минимум 10,2 В сигнал через провода банки не поступает в течение как минимум 0,5 секунды.
Причина:
- Чтобы убедиться, что это подходящая процедура устранения неполадок, перейдите по SCS с HDS и прочтите флэш-код или измените настройку HDS, чтобы отображались коды Honda, и прочитайте код Honda.
- Если код неисправности DTC U0029 отображается на HDS, периодическая неисправность, эта система в настоящее время исправна.
- Если код неисправности не может быть сброшен, выполните поиск неисправностей для кода неисправности U1204 / 55.
Опрос: Где ремонтируется Ваш автомобиль? (Кол-во голосов: 1198)
У себя в гараже
У официалов
В гараже у Васи
Чтобы проголосовать, кликните на нужный вариант ответа.Результаты
From english:
Decoding the error U0029/107 from Honda: F-CAN Malfunction (BUS-OFF (Motor Control Module (MCM)) (HYBRID MODELS)
Make:
Honda
Code:
U0029/107
Definition:
F-CAN Malfunction (BUS-OFF (Motor Control Module (MCM)) (HYBRID MODELS)
Description:
With the ignition ON and the MCM power-supply voltage a minimum of 10.2 V,no signal via the can lines are received for at least 0.5 seconds.
Cause:
- To verify this is the appropriate troubleshooting procedure,jump the SCS with the HDS and read the flash code,or change the HDS setup to show Honda codes,and read the Honda code.
- If DTC U0029 is indicated on the HDS,intermittent failure,this system is OK at this time.
- If the DTC cannot be cleared,do the troubleshooting for DTC U1204/55.
Еще ошибки категории
Ошибки автомобилей разных произвродителей
Опрос: Смогли ли диагностировать неисправность? (Кол-во голосов: 171)
Да, лично
Да, с помощью знакомого
Да, у официального дилера
Нет
Чтобы проголосовать, кликните на нужный вариант ответа.Результаты
Расскажите друзьям:
Поставьте рейтинг, для нас это очень важно:
Голосов: 0 чел. Рейтинг: 0 из 5.
Стандартные коды ошибок OBD2:
Опрос: Помог ли Вам наш сайт? (Кол-во голосов: 232)
Чтобы проголосовать, кликните на нужный вариант ответа.Результаты
Последние комментарии:
Спасибо большое за самый полыный список ошибок!…
Описание U0029 ошибки автомобиля Honda. В нашем справочнике имеется следующая информация:
На русском языке:
Шина данных VAN «A» — функционирование
На английском языке:
Vehicle Communication Bus A Performance
Выберите модель для возможности более детального просмотра информации по этой ошибке:
Найти причину >>>
Принимая во внимание тот факт, что OBD2 ошибки работы электронных систем автомобиля не всегда на прямую указывают на неработающий элемент, а чаще дают всего лишь общую информацию о неисправности, мы пришли к следующему выводу:
В разных марках и моделях автомобилей одна и также ошибка может возникать как следствие неисправности абсолютно разных элементов.
Стало понятно, что просто необходим ресурс в котором можно найти не только общую информацию об OBD2 ошибке, а практические данные по конкретному автомобилю.
Опыт автоэлектриков показал, что если рассматривать определенную марка-модель автомобиля, то в подавляющем большинстве случаев причина возникновения какой либо ошибки одна и также.
Мы создаем, не без вашей помощи, справочник причинно-следственной связи возникновения той или иной OBD2 ошибки у конкретного автомобиля (марка и модель). Если на Ваш автомобиль не найдено описание (причинно-следственной связи) ошибки, то не стесняйтесь задавайте вопрос.
Если у вас есть опыт в устранении той или иной ошибки — делитесь опытом с другими пользователями. Так мы сможем сформировать полезный ресурс. По капле от каждого и всем будет полезно.
Возможно будет интересно:
Если ошибка указывает на неверные параметры (высокие или низкие значения) какого нибудь из датчиков или анализаторов, то вероятней всего этот элемент исправен, а проблему надо искать так сказать «выше по течению», в элементах работу которых анализирует датчик или зонд.
Если ошибка указывает на постоянно открытый или закрытый клапан, то тут надо подойти к решению вопроса с умом, а не менять бездумно этот элемент. Причин может быть несколько: клапан засорен, клапан заклинил, на клапан приходит неверный сигнал от других неисправных узлов.
Автомобили с каждым днем становятся все более сложными, но и более диагностируемыми. Наш форум создан для всех, от простых автолюбителей до профессиональных автоэлектриков.
OBD-II DTC Datasheet
Lost Communication With NOX Sensor A
What does this mean?
This is a generic communications system diagnostic trouble code that applies to most makes and models of OBD-II vehicles.
This code means that the NOX A (NOXS-A) sensor and other control modules on the vehicle are not communicating with each other. The circuitry most commonly used for communication is known as Controller Area Bus communication, or simply the CAN bus.
Modules communicate with each other over a network, just like the network you have at home or work. Car manufacturers use several networked systems. Prior to 2004, the most common (non-exhaustive) inter-module communication systems were the serial communication interface, or SCI; SAE J1850 or PCI bus; and Chrysler Collision Detection, or CCD. The most common system used after 2004 is known as Controller Area Network communication, or simply the CAN bus (also used until 2004 on a small segment of vehicles). Without this CAN bus, control modules cannot communicate and your scan tool may or may not receive information from the vehicle, depending on which circuit is affected.
The NOX sensor A (NOXS-A) is usually screwed into the exhaust pipe behind the SCR catalytic converter. It receives input from a variety of sensors, some of which are directly connected to it, and most are sent over a bus communication system from the powertrain control module (PCM). These inputs allow the module to communicate with the sensor to ensure that the catalyst is monitoring NOx. Refer to the vehicle-specific handbook to determine which module is «A» in your particular case.
Troubleshooting steps may vary depending on the manufacturer, the type of communication system, the number of wires, and the colors of the wires in the communication system.
Code severity and symptoms
The severity in this case is usually severe as it prevents the PCM from determining emission levels. The manufacturer could provide a workaround in the event of a complete communication network failure. Vehicle performance is affected by NOXS-A failure.
Symptoms of a U029D code may include:
- Fault indicator light is on
- NOXS-A does not turn on / does not work / sensor module does not produce voltage
reasons
Usually the reason for installing this code is:
- Open on CAN bus + or — circuit
- Short to ground or ground in any CAN bus circuit
- No power or ground to NOXS-A module
- Rarely — faulty control module
Diagnostic and repair procedures
A good place to start with ALL electrical diagnostics is to check the Technical Service Bulletins (TSB) for your vehicle. The problem you are facing may be known to others in the field. A known fix may have been released by the manufacturer and can save you time and money during diagnostics.
It is assumed that you have access to a code reader at this point, as you may have been able to access the codes up until now. See if there were any other DTCs related to bus communication or battery / ignition. If so, you should diagnose them first, as misdiagnosis is known to occur if you diagnose the U029D code before any of the underlying codes are thoroughly diagnosed and corrected.
If the only code you get from other modules is U029D, try accessing NOXS-A. If you can access the codes from NOXS-A, then the U029D code is either intermittent or memory code. If NOXS-A cannot be accessed, then the code U029D set by other modules is active and the problem already exists.
The most common failure is a circuit failure that results in loss of power or ground to the NOx sensor a.
Check all fuses supplying the NOXS-A module on this vehicle. Check out all the reasons for NOXS-A. Locate ground anchorage points on the vehicle and make sure these connections are clean and secure. If necessary, remove them, take a small wire bristle brush and baking soda / water solution and clean each one, both the connector and the place where it connects.
If any repairs have been made, clear the DTCs from all modules that set the code in memory and see if you can now communicate with the NOXS-A module. If communication with NOXS-A recovers, the problem is most likely a fuse / connection issue.
If the code returns or communication still cannot be established with the module, look for the CAN bus communication connections on your vehicle, especially the NOXS-A connector, which is usually screwed into the exhaust pipe behind the scr catalytic converter. Disconnect the negative battery cable before disconnecting the connector from NOXS-A. Once detected, visually inspect the connectors and wiring. Look for scratches, scuffs, exposed wires, burn marks, or molten plastic.
Disconnect the connectors and carefully inspect the terminals (metal parts) inside the connectors. See if they look burnt or have a green tint indicating corrosion. If you need to clean the terminals, use an electrical contact cleaner and a plastic bristle brush. Allow to dry and apply electrical grease where the terminals touch.
Perform these few voltage checks before reconnecting the connectors to the NOXS-A. You will need access to a digital volt ohmmeter (DVOM). Make sure NOXS-A is powered and grounded. Access the wiring diagram and determine where the main power and ground supplies enter the NOXS-A. Reconnect the battery before proceeding with the NOXS-A still disconnected. Connect the red wire of your voltmeter to each B + (battery voltage) power source going into the NOXS-A connector, and the black wire of your voltmeter to a good ground (if unsure, the negative pole of the battery always works). You should see the battery voltage reading. Make sure you have a good reason. Connect the red wire from the voltmeter to battery positive (B +) and the black wire to each ground. Once again, you should see the battery voltage every time you plug it in. If not, troubleshoot the power or ground circuit.
Then check the two communication circuits. Find CAN C + (or HSCAN +) and CAN C- (or HSCAN — chain) circuit. After connecting the black wire of the voltmeter to a reliable ground, connect the red wire to CAN C +. With the key on and the engine off, you should see about 2.6 volts with slight fluctuations. Then connect the red wire of the voltmeter to the CAN C- circuit. You should see about 2.4 volts with slight fluctuations. Other manufacturers show CAN C- at about 5V and a flapping key when the engine is off. Check out your manufacturer’s specifications.
If all tests pass and communication is still not possible, or you were unable to reset DTC U029D, the only thing that can be done is to seek help from a trained automotive diagnostician, as this will indicate a NOXS-A failure. … Most of these NOXS-A must be programmed or calibrated to fit correctly on the vehicle.
Related DTC discussions
- There are currently no related topics in our forums. Post a new topic on the forum now.
Need more help with code U029D?
If you still need help with DTC U029D, post a question in the comments below this article.
NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.
OBD-II DTC Datasheet
Lost Communication With NOX Sensor A
What does this mean?
This is a generic communications system diagnostic trouble code that applies to most makes and models of OBD-II vehicles.
This code means that the NOX A (NOXS-A) sensor and other control modules on the vehicle are not communicating with each other. The circuitry most commonly used for communication is known as Controller Area Bus communication, or simply the CAN bus.
Modules communicate with each other over a network, just like the network you have at home or work. Car manufacturers use several networked systems. Prior to 2004, the most common (non-exhaustive) inter-module communication systems were the serial communication interface, or SCI; SAE J1850 or PCI bus; and Chrysler Collision Detection, or CCD. The most common system used after 2004 is known as Controller Area Network communication, or simply the CAN bus (also used until 2004 on a small segment of vehicles). Without this CAN bus, control modules cannot communicate and your scan tool may or may not receive information from the vehicle, depending on which circuit is affected.
The NOX sensor A (NOXS-A) is usually screwed into the exhaust pipe behind the SCR catalytic converter. It receives input from a variety of sensors, some of which are directly connected to it, and most are sent over a bus communication system from the powertrain control module (PCM). These inputs allow the module to communicate with the sensor to ensure that the catalyst is monitoring NOx. Refer to the vehicle-specific handbook to determine which module is «A» in your particular case.
Troubleshooting steps may vary depending on the manufacturer, the type of communication system, the number of wires, and the colors of the wires in the communication system.
Code severity and symptoms
The severity in this case is usually severe as it prevents the PCM from determining emission levels. The manufacturer could provide a workaround in the event of a complete communication network failure. Vehicle performance is affected by NOXS-A failure.
Symptoms of a U029D code may include:
- Fault indicator light is on
- NOXS-A does not turn on / does not work / sensor module does not produce voltage
reasons
Usually the reason for installing this code is:
- Open on CAN bus + or — circuit
- Short to ground or ground in any CAN bus circuit
- No power or ground to NOXS-A module
- Rarely — faulty control module
Diagnostic and repair procedures
A good place to start with ALL electrical diagnostics is to check the Technical Service Bulletins (TSB) for your vehicle. The problem you are facing may be known to others in the field. A known fix may have been released by the manufacturer and can save you time and money during diagnostics.
It is assumed that you have access to a code reader at this point, as you may have been able to access the codes up until now. See if there were any other DTCs related to bus communication or battery / ignition. If so, you should diagnose them first, as misdiagnosis is known to occur if you diagnose the U029D code before any of the underlying codes are thoroughly diagnosed and corrected.
If the only code you get from other modules is U029D, try accessing NOXS-A. If you can access the codes from NOXS-A, then the U029D code is either intermittent or memory code. If NOXS-A cannot be accessed, then the code U029D set by other modules is active and the problem already exists.
The most common failure is a circuit failure that results in loss of power or ground to the NOx sensor a.
Check all fuses supplying the NOXS-A module on this vehicle. Check out all the reasons for NOXS-A. Locate ground anchorage points on the vehicle and make sure these connections are clean and secure. If necessary, remove them, take a small wire bristle brush and baking soda / water solution and clean each one, both the connector and the place where it connects.
If any repairs have been made, clear the DTCs from all modules that set the code in memory and see if you can now communicate with the NOXS-A module. If communication with NOXS-A recovers, the problem is most likely a fuse / connection issue.
If the code returns or communication still cannot be established with the module, look for the CAN bus communication connections on your vehicle, especially the NOXS-A connector, which is usually screwed into the exhaust pipe behind the scr catalytic converter. Disconnect the negative battery cable before disconnecting the connector from NOXS-A. Once detected, visually inspect the connectors and wiring. Look for scratches, scuffs, exposed wires, burn marks, or molten plastic.
Disconnect the connectors and carefully inspect the terminals (metal parts) inside the connectors. See if they look burnt or have a green tint indicating corrosion. If you need to clean the terminals, use an electrical contact cleaner and a plastic bristle brush. Allow to dry and apply electrical grease where the terminals touch.
Perform these few voltage checks before reconnecting the connectors to the NOXS-A. You will need access to a digital volt ohmmeter (DVOM). Make sure NOXS-A is powered and grounded. Access the wiring diagram and determine where the main power and ground supplies enter the NOXS-A. Reconnect the battery before proceeding with the NOXS-A still disconnected. Connect the red wire of your voltmeter to each B + (battery voltage) power source going into the NOXS-A connector, and the black wire of your voltmeter to a good ground (if unsure, the negative pole of the battery always works). You should see the battery voltage reading. Make sure you have a good reason. Connect the red wire from the voltmeter to battery positive (B +) and the black wire to each ground. Once again, you should see the battery voltage every time you plug it in. If not, troubleshoot the power or ground circuit.
Then check the two communication circuits. Find CAN C + (or HSCAN +) and CAN C- (or HSCAN — chain) circuit. After connecting the black wire of the voltmeter to a reliable ground, connect the red wire to CAN C +. With the key on and the engine off, you should see about 2.6 volts with slight fluctuations. Then connect the red wire of the voltmeter to the CAN C- circuit. You should see about 2.4 volts with slight fluctuations. Other manufacturers show CAN C- at about 5V and a flapping key when the engine is off. Check out your manufacturer’s specifications.
If all tests pass and communication is still not possible, or you were unable to reset DTC U029D, the only thing that can be done is to seek help from a trained automotive diagnostician, as this will indicate a NOXS-A failure. … Most of these NOXS-A must be programmed or calibrated to fit correctly on the vehicle.
Related DTC discussions
- There are currently no related topics in our forums. Post a new topic on the forum now.
Need more help with code U029D?
If you still need help with DTC U029D, post a question in the comments below this article.
NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.