Toyota Camry

1996-2001 of release

Repair and car operation



Kamri's Toyota
+ 1. Maintenance instruction
+ 1.2. Information before car driving
+ 1.3. Independent maintenance
+ 1.4. Technical characteristics
+ 1.5. Some councils upon car purchase
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmission
+ 9. Running gear
- 10. Brake system
   10.2. Technical characteristics
   10.3. ABS system
   10.4. Blocks of disk brakes
   10.5. Brake support
   10.6. Brake disk
   10.7. Blocks of drum-type brakes
   10.8. Wheel cylinder of brakes
   10.9. Main cylinder of brakes
   10.10. Hoses and hydraulic actuator tubes
   10.11. Air removal from a hydraulic actuator of brakes
   10.12. Vacuum amplifier of brakes
   10.13. Blocks of the parking brake of back disk brakes
   10.14. Parking brake
   10.15. Cables of the parking brake
   10.16. Switch of a signal of braking
   10.17. ABS: natural choice
   10.18. Malfunctions of brake system
+ 11. Body
+ 12. Electric equipment



10.3. ABS system

GENERAL INFORMATION

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 sensors.

Arrangement of units of anti-blocking system of brakes (ABS system)

1. Aktyuator
2, 10. Forward sensors of speed
3. Diagnostic socket (DLC1)
4. Control unit
5. Control lamp of serviceability of ABS system
6, 11. Rotors of sensors of speed
7. Back sensors of speed
8. Diagnostic socket (DLC1)
9. Switch of a signal of braking
12. Relay of the electric motor of ABS system
13. Traction relay of the solenoidal valve

System ABS-units

AKTYUATOR

The structure of an aktyuator includes the main cylinder, the electrohydraulic pump and 4 solenoidal valves.
Prevention

ABS systems are delivered by Bosch and Nippondenso firms. Aktyuator systems of Bosch firm has monoblock execution and contains the built-in processor control unit and the relay of solenoidal valves whereas in Nippondenso system these components are mounted separately.


The electropump is intended for liquid pumping in aktyuator receivers through which liquid under pressure moves in a contour of brakes.

Solenoidal valves operate pressure in a contour of brakes at ABS system operation, the block of valves contains 4 valves, it is the share of a wheel on 1 valve.

SENSORS OF SPEED OF ROTATION OF WHEELS

Sensors of rotor type, are mounted on each of wheels. Signals from sensors arrive on the control unit.

Forward sensors are mounted on a rotary fist, near gear rings of rotors. Rotors are structurally incorporated with forward external CV JOINTS of semi-axes.

Back sensors are mounted on arms of a back axis, rotors are structurally incorporated with a back nave.

ABS SYSTEM CONTROL UNIT

The control unit of Nippondenso system is mounted under a forward partition of a body, the control unit of Bosch system is mounted in an aktyuator. On the block signals from the switch of a signal of braking and sensors of speed of each wheel arrive. These signals are basic data for pressure adjustment in a hydraulic actuator of this wheel. The control unit also possesses function of self-diagnostics and storing of refusals.

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

Diagnostic codes

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

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

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

Crossing point of the diagnostic socket of Nippondenso ABS system

1. Crossing point

Peremykayemye conclusions on two types of used diagnostic sockets

 

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

Nature of refusal determine by the enclosed table.

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

Table of codes of refusals of ABS system

CODE
NATURE OF MALFUNCTION
UNDERTAKEN ACTIONS
11
Break in a chain of the relay of the solenoid To check 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
Break in a chain of the relay of the relay of the electric motor of the pump To check 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 the solenoid of an aktyuator 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
Break or short circuit in SMC1 chain To check an aktyuator of system and a chain
26
Break or short circuit in SMC2 chain To check an aktyuator of system and a chain
27
Break or short circuit in SRC1 chain To check an aktyuator of system and a chain
28
Break or short circuit in SRC2 chain To check an aktyuator of system and a chain
31
The sensor of speed of the right forward wheel is faulty To check sensors of speed, conducting and the sensor socket
31
The signal from the sensor of speed of the right forward wheel does not arrive To check the sensor of speed, conducting and the sensor socket
32
The signal from the sensor of speed of the left forward wheel does not arrive The same
33
The signal from the sensor of speed of the right back wheel does not arrive The same
34
The signal from the sensor of speed of the left back wheel does not arrive The same
35
Break in a chain of the sensor of speed of the right forward wheel The same
36
Break in a chain of the sensor of speed of the left forward wheel The same
37
The number of a teeth of a rotor of the sensor of speed does not correspond to the normal To check serviceability of a rotor of the sensor (existence of all teeth)
38
Break in a chain of the sensor of speed of the right back wheel or in the sensor. To check the sensor of speed, conducting and the sensor socket
39
Break in a chain of the sensor of speed of the left back wheel or in the sensor To check the sensor of speed, conducting and the sensor socket
41
Too low voltage on the battery Check charge system: the generator (see subsection 3.4.10), the battery (see subsection 3.4.9), a tension regulator (see subsection 3.4.11).
43
Refusal of a control system by an unblocking of brakes Check all wires and ABS system sockets
44
Break or short circuit in a NE signal chain Check all wires and sockets from the ABS system control unit
49
Break in a chain of the switch of a signal of braking or in the switch Check the switch and a switch chain
51
The aktyuator electric motor is blocked Check existence of short circuit in an electric motor and relay chain, check the battery
53
PCM chain refusal Check all wires and sockets from the ABS system control unit
58
Break in a chain of the switch of a signal of braking or in the switch Check the switch and a switch chain
61
Refusal of a control system by the engine Check codes of refusals of a control system of the engine (see subsection 7.2.)
62
Failure of the control unit Repair or control unit replacement is required
The lamp burns continuously
Failure of the control unit Repair or control unit replacement is required