In detail: bmw e39 do-it-yourself abs block repair from a real master for the site my.housecope.com.
Useful DIY Tips
DIY abs block repair
BMW 5 series logbook Crystal blue
Repair of the abs block on a bmw e39 with their own
DIY abs block repair
E39 - Problems with the abs block and BMW Club wipers
DIY bmw abs block repair
DIY bmw abs block repair
DIY bmw e39 abs block repair., Detailed video report
DIY abs block repair
Abs block for BMW E39 buy in North Ossetia on Avito - Announcements on the Avito website
Repair of the abs block 8E0614111в passat B5 ... and not only "Autoschemes, diagrams for cars, do it yourself
Repair of the BMW E39 ABS unit. The most complete information about the ABS blocks of the BMW E39. All ABS E39 blocks on one page. Photo of ABS blocks
DIY abs block repair
repair of the dsc abs block BMW E38
How I repaired the ABS block BMW e53.
Repair of the BMW E39 ABS unit. The most complete information about the ABS blocks of the BMW E39. All ABS E39 blocks on one page. Photo of ABS blocks
The complete set of the BMW E39 car includes a system that unlocks the wheels during emergency braking. This system is included in most new vehicles. The main function of ABS is that in a critical situation it prevents the wheels from completely blocking during hard braking. This system also helps to better control the machine during hard braking. This mainly happens when entering a bend and also on an ice-covered road. The ABS system includes:
Control block.
System breakdown lamp. It is located in the passenger compartment on the dashboard.
Special sensors located on BMW wheels.
An electronic device, which is located in the control device, performs the function of monitoring the appearance of problems in the system itself. In the event of a breakdown, a light comes on on the information panel, and the system itself ceases to function. Driving a car in such a situation is allowed, but with a sharp braking, the car will weigh itself differently. Almost any BMW E39 driver can diagnose and fix problems in the system.
Video (click to play).
After the vehicle has been factory tested, the ABC system begins. In this case, the lamp in the passenger compartment on the torpedo lights up for 3 seconds. After the elapsed time, the light goes out. If the indicator has not gone out, you should do the following:
If the car was moving, it should be stopped and the engine turned off. It should take 3 minutes. Then start the car again.
The voltage in the battery should be checked - 10.5 W.
It is necessary to check the terminals and power wires.
View all wires that go to the wheel sensors.
If the light bulb continues to work, you should contact a BMW service professional for diagnostics. With the help of a special electronic device, information is read from the unit and the point of the problem is determined.
To understand that there is a problem with the E39 ABS unit, you can notice a different behavior of the car:
No communication with sensors on wheels.
Installing new sensors does not solve this problem.
The order of destruction of the block by sensors: left - behind; right - in front; front - left; the back is on the right.
The speedometer stops working.
Indicators on the instrument panel in the passenger compartment are illuminated to indicate a problem.
After warming up the BMW vehicle, the system is automatically deactivated.
ABC turns off when driving on uneven road surfaces.
An independent check must begin with the cycle number sensors. The device is bolted to the hub. Therefore, remove the brake disc assembly and other parts. The bolts can be unscrewed with a special hex key, counterclockwise. For better removal, sprinkle the bolts with WD-40 (a special tool - wedge).
After removing the sensor, disconnect the connector located on the upper wing. You should also check the wires for integrity.If a wire is found to be damaged, it must be replaced with a new one; twisting and insulation are not suitable in this case. The wire needs the same length and the same cross-section. Sensor resistance 0.9-1.3 kOhm.
In the BMW E39 until 1999, there were no problems with the anti-lock braking system. But newer car releases have such a weak spot. This is due to an unsuccessful fixation of the control unit. It is located near the power unit. To restore the hydroelectronic unit after 1999, a rosin and tin soldering iron will be required.
The weak point of the control unit is the conductors that connect the connector to the device board. Contact is lost precisely at this point. This is due to constant vibration as well as sudden changes in temperature.
Remove the cover from the unit using a large knife or a hacksaw.
Carefully remove the protection layer from the edge of the board. You do not need to remove the entire layer. Need access to guides. They are made of aluminum and run from the board to the connector. Use a regular needle to check the contact. The needle should be lightly pricked into the guide wire.
With tweezers or tweezers, the conductor is removed without contact. And a new one is put in its place using soldering. The best conductor is copper wire. The same cross-section and alloy wire from the mobile phone charger.
There are 16 wires connected to the connector itself. They all need to be checked. If there is no conductivity, the wire changes in the same way.
Before installing the cover in its place, you should use a sealant. The block returns to its place in the car. High pressure pipes and sensor contacts are connected to it.
If the ABS unit has already been repaired, then it cannot be repaired again. Purchase a new one from a specialist store. Do not drip this block on the workbenches. Most often it has defects.
It is permitted to operate a BMW with a broken ABS system, but this is the safety of the driver, passengers and others.
The BMW E39 car, like most modern cars, is equipped with an anti-lock system (ABS). Its main task is to prevent complete blocking of the wheels when braking in an emergency. The anti-lock braking system improves vehicle control when you press the brake pedal sharply, especially when cornering and during ice conditions. The ABS includes the following components: a hydroelectronic control unit, a system malfunction warning lamp located on the dashboard, and sensors on the wheels of the vehicle.
The main task of ABS is to prevent complete blocking of the wheels when braking in an emergency
An electronic device located in the control unit monitors the presence of defects in the system. If there are any, then the malfunction indicator comes on and the system shuts down. In this case, you can drive the car, but when braking, it behaves as if there is no anti-lock braking system. Almost every BMW E39 owner can check and repair the ABS unit, including replacing sensors with their own hands. But there are differences in the models before and after restyling.
BMW E39 in 1999 underwent restyling. The modernization affected not only the body and power units, but also the anti-lock wheel system during braking. In models before restyling, the valve body and the electronic control device are spaced around the car body: the hydraulic part is under the hood, and the electronic unit is in the car's interior (behind the glove compartment).
Since 1999, the manufacturer has combined the two blocks into one and placed it under the hood near the intake manifold. This solution turned out to be not entirely successful, because the electronic device turned out to be sensitive to temperature changes and strong vibrations. It was this design decision that became the main reason for the failure of the ABS system.
The wheel sensors have also been changed.Until 1999, the sensor was attached to the wheel hub with two bolts, and the connector was painted gray. After restyling, the sensor has one ear for attachment, and the chip is painted blue.
After turning the key in the ignition lock, system diagnostics starts. The ABS light is on for about 3 seconds and then should go out. If the indicator remains on for longer or starts to glow while driving, you should perform the following actions:
Park the car, turn off the engine. Start the engine after 2-3 minutes.
Check the voltage supplied by the battery. It should not be less than 10.5 volts.
Make sure that there is good contact between the power wires and the battery terminals.
Check the integrity of the wires coming from the wheel sensors.
If the anti-lock braking system lamp continues to burn, then most likely you will have to contact a service station and carry out a full diagnosis there. Using a special device, you can read the error code and use it to determine the direction to eliminate the defect.
The ABS diagnostics should be started by checking the speed sensors. To get to them, you need to remove the wheel, caliper and brake disc. The sensor is attached to the hub with two or one bolts; they can be unscrewed using a hexagon. Treat everything with WD-40 before dismantling.
ABS diagnostics should start with checking the speed sensors
After removing the ABS sensor, disconnect the connector (it is located at the top of the wing). Make sure the wires are intact before checking the sensor. If there is damage, the wires can be replaced. In this case, it is important that the length of the wires remains the same, and the electrical resistance of the sensor does not change. If you do not quite understand what this is about, then it is better to contact an electronics specialist. The working sensor should have a resistance in the range of 0.9-1.3 kΩ.
For BMW E39, before restyling, there are practically no problems with the electronic part of the ABS, but the anti-lock braking system on models from 1999 is more capricious due to the unsuccessful placement of the control unit under the hood near the engine. You can try to reanimate the hydroelectronic unit from a car after 1999 on your own. For this, skills in working with a soldering iron will come in handy.
The sore spot of the electronic control unit is the conductors connecting the connector and the device board. Often, contact is lost precisely in them due to frequent changes in temperature and vibration. How to eliminate this defect, we will consider below.
Cut off the cover from the removed block. This can be done with a sharp knife or hacksaw blade.
Carefully remove the protective layer from the edge of the board. The entire surface is flooded with it. There is no need to completely remove the layer. You need to get access to the aluminum conductors from the board to the connector. Taking a needle in our hands, carefully check the contact. To do this, it is enough to poke the guide with a needle.
Using tweezers, remove the conductor that has no contact. Solder a new one instead. Better to take a thin copper wire. A wire from an idle mobile phone charging cord is perfect. Surely many will find this at home.
We check the rest of the conductors. The connector has 16 conductors. If there is a break, re-solder the contact.
We install the cover on the sealant. We mount the unit in the car. We connect hydraulic pipes and sensor connectors.
If "experts" have already climbed into the control unit, then it will be almost impossible to repair it. Better to immediately look for a replacement. It is not recommended to buy an ABS unit for disassembly.He may have defects that may appear later.
You can drive without ABS, but remember that the anti-lock braking system is an element of the car's safety. Take care of yourself and others.
