Monthly Archives: July 2014

BMW X3 airbag fault warning light flashes sometimes riding indoor lighting

An approximately 160,000 km mileage 2004 BMW X3E83SUV. Users report: car instrument airbag fault warning lights, cab lights sometimes flicker, front and rear wiper operation weakness, often stuck in the middle of the glass does not move.

After the pick fault content is read by ISID :50-MRS supply voltage; 8C-KOMBI moldings R; 87-KOMBIK bus; 30-GMK bus. Failure to read the content from the perspective of the detector in addition to “50-MRS supply voltage” Others are more abstract failures content, Symptom vehicle from the surface nothing seems implicated, so he decided to choose the airbag fault first, the phenomenon of exclusion. Select “50-MRS supply voltage” testing program execution, inspection program first analyzes the fault stored in the memory of the memory voltage is too low, if the supply voltage exceeds the 20s MRS is less than 9V, MR will store this fault, where MRS is the airbag The control unit or multi-occupant protection system control unit. Continue the inspection program, the detector gives a circuit diagram of the airbag system shown in Figure 1, and is recommended to check the battery voltage, battery check circuit diagram of a voltage with a voltage of 12.8V, normal. Tips for inspection in accordance with the circuit diagram of F11 MRS insurance, the insurance did not fuse. In accordance with the test plan to continue down analysis, whether between MRS supply terminal X74 of 57 feet and a ground supply voltage 9 ~ 16V, using a multimeter to measure voltage 57 between the foot and the ground terminal is only 5 ~ 8V, followed by measure the voltage X10016 22-pin terminal, F11 insurance and ground, the result is only 5 ~ 8V, it is clear that there is power failure MRS. MRS is powered by the battery through the ignition switch provides direct R block, as shown in the ignition switch in the position of a radio block diagram of the F11 is the insurance supply terminal R block shown in Figure 2. R-side airbag system not only to the insurance F11 power, but also for several systems powered A1 fuse distributor of F5 ~ F15’s. Since the F11 is only 5 ~ 8V supply voltage, and that several other insurance system is not only 5 ~ 8V supply voltage it? Measurements and inferred as, F5, and several fuses are also only 5 ~ 8V supply voltage. View schematics to find the fuse F9 is powered body basic module, and flying fuse wiper relay is controlled by the body basic module for the interior lights powered F6. Symptom several vehicles, seemingly unrelated, are actually the cause of the power supply voltage is too low skp-900.

R block is rotated by a mechanical key mechanical ignition lock, ignition switch by changing the linkage of internal contact position control, a common cause of failure is mostly inside the ignition switch contacts wear or erosion caused. To verify the empirical analysis is correct, the maintenance staff while measuring the voltage at A1 distributor, while shaking the ignition switch, then found Al multimeter measured at the supply voltage constantly varies between 5 ~ 11V, then check to make sure the ignition switch after the connection terminal is no problem, indeed the point of failure is the ignition switch.

Replace the ignition switch, troubleshooting.This story originally appeared on https://superobdskp900.wordpress.com

Facilitate the safe use of the car itself decoder forget preparedness others

When in late June of this year, a unit of a Junsao drove out parking, remember the car key remote control function has been on the locked car. But when she returned to the car after finishing things, they found a bag in the car were missing, while the locks and body are intact. Local police found after surveying the scene, which is a typical use of car theft in the decoder implementation. The decoder also known as automobile automotive fault diagnostic, and automotive connectors, you can read the electronic information system failures and help repair personnel to quickly and accurately determine fault and condition. Automotive vehicles generally have a remote lock function, the principle is the vehicle when locking and unlocking the car key remote control signals generated password is sent to the receiving device in the car after encryption, passwords, and when this group receiving device matches the door on opens. Criminals is to lock the car owners using the decoder reads the data in the control function, the code signal sent to intercept the remote copy down the owner, the owner of a leave after opened the door, and stole the car belongings.

See above case, you are not a thief now marveling hsiang, pervasive it? Then you would be wrong to carry out the theft, there is no corresponding technical knowledge, it is impossible to do.

With the rapid development of the automotive industry, used in engine control system, electronically controlled automatic transmission, ABS anti-lock braking, SRS airbags, electronic suspension, cruise control and other related electronic control systems on the car are increasingly more, and repair industry as a troubleshooting method also has experience in the diagnosis of human development by the appropriate equipment for diagnosis, especially some of the electronic control system imported luxury cars can only be diagnosed by the equipment, and in many of these among the equipment we use is the most common electronic control system detector, known as the decoder.

Automotive decoder is actually the name of a broad sense, the current market auto decoders common in three ways: The first is the traditional sense of aftermarket tools called automotive fault diagnostic. It is for our cars to provide maintenance to equipment failure code and data, there is no risk of theft of the car; second car decoder chip, also called car keys matching instrument. This machine can be said to be double-edged sword, beneficial to have disadvantages, which in many cases lost car keys flourish, car keys matching to solve the problem, it can be said in this regard Automotive decoder chip is denied. However, such tools once in the hands of criminals, has become the root cause of crime. Now the car chip decoder, easy to operate, leading technology outflow. In the absence of effective management mechanism, in the market economy stimulus, whether producers or sellers mercenary, who makes use of the product audit, resulting in a large number of automotive chip decoder outflow into the hands of social workers. For this car immobilizer chip current situation is almost no preventive measures. If you really want to effectively prevent, motor vehicles must be removed OBD interface; third car decoder is the most harmful to an electronic tool. Is pure criminals stealing cars ready for remote control decoder. It is by receiving the majority of owners of remote control signals to the various functions of the remote copy is equivalent to lock as soon as you press the remote control when the car thief had already got your car remote control. This is why obviously put a good lock, or stolen, and there is no trace of damage. According to research this kind of remote control decoder is very powerful, as long as your remote control signal received either lock or unlock the car signals the signal, you can put all your remote control function to copy. Whether it is to open the door, lock the door or open the trunk. Thus, according to the majority of owners should be alert to this it works within 20 meters when no other suspicious persons can use the remote control to lock the car. If the high traffic areas, try to lock the car with the key.

Initial application of high technology for the convenience of users’ lives, but always had to take advantage of some criminals take advantage. So reminded owners. But also to facilitate their defense of others, be safe to travel.