Toyota Camry

1996-2001 of release

Repair and operation of the car

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

Solenoidal valves operate pressure in a contour of brakes at operation of the ABS system, 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 combined with forward external CV JOINTS of half shafts.

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

ABS SYSTEM CONTROL UNIT

The control unit of the Nippondenso system is mounted under a forward partition of a body, the control unit of the 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 adjustment of pressure in a hydraulic actuator of this wheel. The control unit also possesses function of self-diagnostics and storing of refusals.

At system failure the control lamp on the dashboard lights up, and in memory the code of refusal which can be considered and defined the 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 inclusion of ignition the control lamp of the ABS system lights up, and after launch of the engine dies away. If the lamp continues to burn, then in the ABS system malfunction is registered.

For access to codes of refusals transfer the ignition key to position of OFF (the engine does not work). In the Nippondenso system get a crossing point (you watch the photo) conclusions of the diagnostic socket. On systems of both types you peremknit conclusions of E1 and the CU of the socket, transfer the ignition key to position of ON (the engine is not started) and consider codes.

Crossing point of the diagnostic socket of the Nippondenso ABS system

1. Crossing point

Peremykayemy conclusions on two types of the used diagnostic sockets


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

Determine the nature of refusal by the enclosed table.

After reading erase codes for what you peremknit conclusions of E1 and the CU of the socket, transfer the ignition key to position of ON (the engine is not started) and press a pedal not less than 8 times during 5 sec. Remove a crossing point and put into place a socket cover. Hand over the car in car service.

Table of codes of failures of the system of ABS

CODE	NATURE OF MALFUNCTION	THE TAKEN ACTIONS
11	Break in a solenoid relay chain	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 pump electric motor relay relay chain	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 speed sensors, conducting and the socket of the sensor
31	The signal from the sensor of speed of the right forward wheel does not arrive	To check the speed sensor, conducting and the socket of the sensor
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 teeth of a rotor of the sensor of speed does not correspond to 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 speed sensor, conducting and the socket of the sensor
39	Break in a chain of the sensor of speed of the left back wheel or in the sensor	To check the speed sensor, conducting and the socket of the sensor
41	Too low voltage on the battery	Check system of a charge: the generator (see subsection 3.4.10), the battery (see subsection 3.4.9), tension regulator (see subsection 3.4.11).
43	Failure of the system of management of an unblocking of brakes	Check all wires and sockets of ABS system
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 chain of the switch
51	The aktyuator electric motor is blocked	Check existence of short circuit in a chain of the electric motor and relay, check the battery
53	Refusal of a PCM chain	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 chain of the switch
61	Failure of the system of engine management	Check codes of failures of the system of engine management (see subsection 7.2.)
62	Failure of the control unit	Repair or replacement of the control unit is required
The lamp burns continuously	Failure of the control unit	Repair or replacement of the control unit is required