Toyota Camry

1996-2001 of release

Repair and car operation

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