Toyota Camry

1996-2001 of release

10.3. ABS-system

THE GENERAL DATA

The system of an automatic unblocking of brakes (ABS-system), is intended for increase of stability of the car in the conditions of sharp braking or at movement in bad road conditions. It is provided with that pressure in a contour of brakes is regulated depending on speed of rotation of the wheels, registered by gauges.

Arrangement of units of antiblocking system of brakes (ABS-system)

1. Актюатор
2, 10. Forward gauges of speed
3. A diagnostic socket (DLC1)
4. The management block
5. A control lamp of serviceability of ABS-system
6, 11. Rotors of gauges of speed
7. Back gauges of speed
8. A diagnostic socket (DLC1)
9. The switch of a signal of braking
12. The relay of the electric motor of ABS-system
13. The traction relay of the solenoidal valve

Units ABS - systems

АКТЮАТОР

The structure актюатора includes the main cylinder, the electrohydraulic pump and 4 solenoidal valves.
The prevention
Systems ABS are delivered by firms Bosch and Nippondenso. Актюатор monoblock execution has firm Bosch systems and contains the built in processor block of management and the relay of solenoidal valves whereas in system Nippondenso these components are mounted separately.

The electropump is intended for liquid pumping in receivers актюатора through which the liquid under pressure moves in a contour of brakes.
Solenoidal valves operate pressure in a contour of brakes at system ABS operation, the block of valves contains 4 valves, on a wheel it is necessary on 1 valve.

GAUGES OF SPEED OF ROTATION OF WHEELS

Gauges роторного type, are mounted on each of wheels. Signals from gauges arrive on the management block.

Forward gauges are mounted on a rotary fist, near to gear rings of rotors. Rotors are structurally united with forward external SHRUS of semiaxes.

Back gauges are mounted on arms of a back axis, rotors are structurally united with a back nave.

THE BLOCK OF MANAGEMENT OF SYSTEM ABS

The block of management of system Nippondenso is mounted under a forward partition of a body, the block of management of system Bosch is mounted in актюаторе. On the block signals from the switch of a signal of braking and gauges of speed of each wheel arrive. These signals are the initial data for pressure adjustment in a hydrodrive of the given wheel. The management block also possesses function of self-diagnostics and storing of refusals.

At system refusal the control lamp on the panel of devices lights up, and in memory the code of refusal which it is possible to consider and define character of malfunction or faulty knot is brought.

Diagnostic codes

The malfunction code is stored in memory before deleting of contents of cells of memory, or before malfunction elimination.

At ignition inclusion the control lamp of system ABS lights up, and after engine start-up dies away. If the lamp continues to burn, in system ABS malfunction is registered.

For access to codes of refusals the ignition key translate in position OFF (the engine does not work). In system Nippondenso get a crosspiece (look a photo) conclusions of a diagnostic socket. On systems of both types перемкните conclusions Е1 and the socket Hardware, the ignition key translate in position ON (the engine is not started) and consider codes.

Crosspiece of a diagnostic socket of ABS-system Nippondenso

1. A crosspiece

Peremykaemye conclusions to two types of used diagnostic sockets

Figures of a two-place code are defined on number of blinkings of the control lamp divided by a pause in 1,5 сек (for example a code 34 – 3 flashes, a pause 1,5 сек and 4 flashes).
The following code (in the presence of one more malfunction) appears through 2,5 сек after the first. If the system is serviceable, the lamp blinks with the period 0,5 with.

Character of refusal define under the applied table.

After reading erase codes for what перемкните conclusions Е1 and the socket Hardware, the ignition key translate in position ON (the engine it is not started) and press a pedal not less than 8 times during 5 seconds Remove a crosspiece and put into place a socket cover. Hand over the car in car-care centre.

The table of codes of refusals of system ABS

CODE

CHARACTER OF MALFUNCTION

UNDERTAKEN ACTIONS

11
Breakage in a chain of the relay of the solenoid To check up the relay of the solenoidal valve and conducting of a chain of the relay

12
Short circuit of a chain of the relay of the solenoidal valve The same

13
Breakage in a chain of the relay of the relay of the electric motor of the pump To check up the relay of the pump and conducting of a chain of the relay

14
Short circuit of a chain of the relay of the electric motor of the pump The same

21
The chain of the solenoid of the right forward wheel is faulty To check up the solenoid актюатора and a chain

22
The chain of the solenoid of the left forward wheel is faulty The same

23
The chain of the solenoid of the right back wheel is faulty The same

24
The chain of the solenoid of the left back wheel is faulty The same

25
Breakage or short circuit in chain SMC1 To check up актюатор systems and a chain

26
Breakage or short circuit in chain SMC2 To check up актюатор systems and a chain

27
Breakage or short circuit in chain SRC1 To check up актюатор systems and a chain

28
Breakage or short circuit in chain SRC2 To check up актюатор systems and a chain

31
The gauge of speed of the right forward wheel is faulty To check up gauges of speed, conducting and a gauge socket

31
The signal from the gauge of speed of the right forward wheel does not arrive To check up the gauge of speed, conducting and a gauge socket

32
The signal from the gauge of speed of the left forward wheel does not arrive The same

33
The signal from the gauge of speed of the right back wheel does not arrive The same

34
The signal from the gauge of speed of the left back wheel does not arrive The same

35
Breakage in a chain of the gauge of speed of the right forward wheel The same

36
Breakage in a chain of the gauge of speed of the left forward wheel The same

37
The number of a teeth of a rotor of the gauge of speed does not correspond to the normal To check up serviceability of a rotor of the gauge (presence of all teeth)

38
Breakage in a chain of the gauge of speed of the right back wheel or in the gauge. To check up the gauge of speed, conducting and a gauge socket

39
Breakage in a chain of the gauge of speed of the left back wheel or in the gauge To check up the gauge of speed, conducting and a gauge socket

41
Too a low voltage on the battery Check up charge system: the generator (subsection 3.4.10 see), the battery (subsection 3.4.9 see), a pressure regulator (subsection 3.4.11 see).

43
Refusal of a control system by an unblocking of brakes Check up all wires and ABS-system sockets

44
Breakage or short circuit in a NE-signal chain Check up all wires and sockets from the block of management of ABS-system

49
Breakage in a chain of the switch of a signal of braking or in the switch Check up the switch and a switch chain

51
The electric motor актюатора is blocked Check up short circuit presence in chains of the electric motor and the relay, check up the battery

53
PCM-chain refusal Check up all wires and sockets from the block of management of ABS-system

58
Breakage in a chain of the switch of a signal of braking or in the switch Check up the switch and a switch chain

61
Refusal of a control system by the engine Check up codes of refusals of a control system of the engine (subsection 7.2 see.)

62
Refusal of the block of management Repair or replacement of the block of management is required

The lamp burns continuously
Refusal of the block of management Repair or replacement of the block of management is required