BMW 5 series E39

Since 1996-2001 of release

Repair and car operation

Antiblocking system

The antiblocking system (ABS) consists of the electrohydraulic block of management with the built in electronic device, control lamp ABS and gauges of number of the turns established on wheels.
ABS interferes with blocking of wheels at sharp braking. Thanks to it at full braking the car remains operated. The driver feels action ABS on a pulsation of a brake pedal and on hydrounit noise in an impellent compartment.

Protection in the electronic block of management watches that in the presence of defect (for example, cable breakage) or at decrease in feeding pressure of the storage battery more low 10.5 In ABS it was independently disconnected. It is displayed by fire on the panel of devices of control lamp ABS. The usual brake system thus continues to work. The car at braking behaves so as if ABS is not present.
After inclusion of ignition ABS makes self-diagnostics. Approximately through 3 with a control lamp dies away. If it burns longer or lights up during movement, it is necessary to pay attention to the following:
   a) Stop the car, switch off the engine and again start it.
   b) Check up pressure of the storage battery. If it makes less than 10.5 In, charge the battery.
   c) Check up, whether contact of wires to an accumulator room of batteries is reliable.
   d) Lift and establish the car on supports. Remove wheels. Check up presence of damages of electric wires. More serious check ABS should be carried out by experts. By means of the special device of malfunction can be считаны from memory and are eliminated.

System ASC+T

System ASC+T (system of stabilisation of stability and automatic adjustment of traction effort of the engine) interferes пробуксовыванию back wheels at gas increase, for example on road with a wet covering as the revolving wheel cannot create sufficient motive power and coupling with road. The considered system is built in the block of management ABS.

The management block receives the information on angular speed of wheels from gauges of wheels which are simultaneously used as gauges ABS. If the back wheel starts to revolve, сиcтема DME (the electronic control system of the engine) receives the information from the block of management ABS/ASC+T. System DME reduces capacity of the engine by management of injectors. The ignition moment in addition can vary. The effect of management is thus similar отпусканию the driver of a pedal of gas. Capacity of the engine quickly decreases, wheels stop to revolve. If it is not enough of it, the monitoring system of traction effort подтормаживает revolving driving wheels. System ASC+T action is displayed on the panel of devices by a blinking of a control lamp.

In system there is an adjustment of traction effort. It interferes with short-term blocking приводных wheels on an equal road covering thanks to brake action of the engine. Till the speed of 40 km/hour the monitoring system of traction effort creates differential blocking. As the left and right wheel подтормаживаются is independent from each other, system ASC+T operates as blocking differential with efficiency of blocking about 100 %.

System ASC+T registers malfunctions in the work. After ignition inclusion on the panel of devices quickly lights up and the control lamp dies away. If the lamp does not die away or burns during movement it specifies in presence of malfunctions in system. The car can move further, but system ASC+T does not work.

At movement with snow chains on deep snow or at трогании from a place from a deep dirt it is expedient to disconnect system ASC+T the switch located on the central console. To include system it is possible the same switch. At following start of the engine the system joins.