Mitsubishi Galant

1990 — 2001 of release

Repair and car operation

Whipped Cream

System of anti-blocking of brakes (ABS) - the general information, problem diagnostics and codes of malfunctions

General information

When the vehicle is equipped with brake system of usual type, sharp squeezing of a pedal of a foot brake leads to blocking of wheels. Coupling of a protector with a paving is thus broken, and the car can go yuzy, losing controllability. The system of anti-blocking of brakes (ABS) prevents premature blocking of wheels, continuously operating speed of their rotation during braking at the expense of modulations of pressure of hydraulic liquid in each of brake mechanisms.

The electronic ABS control unit (ECU) traces speed of rotation of each of car wheels, being guided by the signals arriving from wheel sensors. When at emergency braking any of wheels it starts to be blocked prematurely, ECU gives out command for activation of the electromagnetic valve placed in the hydraulic modulator which, working, opens the corresponding site of a brake contour, letting out from it a part of hydraulic liquid in the tank and, respectively, reducing working pressure. As soon as speeds of rotation of wheels are equalized, the valve is closed again and pressure continues to rise. The cycle lasts fractions of a second on each of wheels and repeats until braking will not be complete. The design of system allows to correct pressure in hydraulic contours of each of four wheels. Actually the scheme of functioning of ABS is much more difficult, than it can seem, therefore originators of the real Management do not recommend to owners of cars to make attempt of independent performance of repair of system. In case of malfunctions it will be most reasonable to address to specialists of car-care center.

Problem diagnostics and codes of malfunctions

If built in in the car dashboard the control lamp of ABS lights up and continues to burn during movement, first of all make sure that the parking brake is completely released, and the brake system functions regularly. If all in norm, therefore, was ABS refusal. Do not forget that operation of a control lamp of ABS can be caused by decrease in level of brake liquid in the GTTs tank, - also control lamp of brake system at the same time will work. Constant, not connected with wear of frictional overlays of blocks, the consumption of brake liquid speaks about existence of leaks in a hydraulic path:

a) Check a condition of brake supports and wheel cylinders;
b) Check components of a hydraulic path on existence of signs of development of leaks;
c) Check a condition and reliability of fastening of contact sockets of electroconducting of ECU and wheel sensors (see. Head Onboard electric equipment);
d) Check the corresponding safety locks (see. Head Onboard electric equipment).

The module of management (ECU) of ABS traces any violations of functioning of components of system. In case of refusal identification on the dashboard the corresponding control lamp lights up, the system of anti-blocking of brakes is disconnected. In memory of the module of management the refusal code thus registers.

At ignition inclusion the control lamp of ABS gives out two (FWD models) or four (AWD models) of flash within 1 second, then should go out.

If during performance of independent checks of any violations it is not possible to reveal, drive away the car on car repair shop. Complete diagnostics of ABS demands use of the special input reader of the DRB-II or MUT-III type connected to the diagnostic DLC socket located at the left under the dashboard.

List of codes of malfunctions of ABS

Diamante 1992 ÷ 1996 models of вып.

The Diamante models since 1997 вып.

The Galant models for 1993 вып.

Galant 1994 ÷ 1998 models of вып.

The Galant models since 1999 вып.

Mirage 1993 ÷ 1996 models of вып.

The Mirage models since 1997 вып.