1986 TOYOTA CAMRY V20 battery

INITIAL CHECK
CHECK ACTUATOR OPERATION NOISE
(a) Start the engine and drive at a speed over 6 km/h
(4 mph).
(b) Check that the actuator operation noise is heard.
HINT: A initial check is carried out once each time after the
engine has been started and initial speed exceeds 6
km/h (4 mph). The respective functions, in order, of the 3
position solenoid and pump motor in the actuator are
checked. However, if the brake pedal is depressed, the ini-
tial check is not carried out, but is started after the pedal
has been released.
INSPECTION OF DIAGNOSIS SYSTEM
1. INSPECT BATTERY VOLTAGE
Inspect that the battery voltage is about 12 V.
2. CHECK THAT WARNING LIGHT TURNS ON
(a) Turn the ignition switch on.
(b) Check that the ºANTILOCKº warning light turns on for
3 seconds.
If not, inspect and repair or replace the fuse, bulb and wire
harness.
Diagnosis System
DESCRIPTION
If a malfunction occurs, the system will identify the prob-
lem and the computer will store the codes for the trouble
items.
At the same time, the system informs the driver of a mal-
function via the ºANTILOCKº warning light in the combina-
tion meter.
By turning on the ignition switch and disconnecting the
check connector, the trouble can be identified by the
number of blinks (diagnostic code) of the warning light.
In the event of two codes, that having the smallest num-
ber (code) will be identified first.
HINT: The warning light does not show the diagnostic
codes while the vehicle is running.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±67

(c) In event of a malfunction, 4 seconds later the warning
light will begin to blink. Read the number of blinks.
(See DIAGNOSTIC CODE on page BR±69)
HINT: The first number of blinks will equal the first digit
of a two digit diagnostic code. After a 1.5 second
pause, the
2nd number of blinks will equal the 2nd number of a two
digit code. If there are two or more codes, there will be
a 2.5 second pause between each, and indication will
begin after 4.0 second pause from the smaller value
and continue in order to larger.
(d) If the system is operating normally (no malfunction),
the warning light will blink 2 times per second.
(e) Repair the system.
(f) After the malfunctioning components has been re-
paired, clear the diagnostic codes stored in the com-
puter.
(See page BR±70)
HINT: If you disconnect the battery cable while repair-
ing, all diagnostic codes in the computer will erased.
(g) Connect the check connector.
(h) Turn the ignition switch on, and check that the
ºANTILOCKº warning light goes off after the warning
light goes on for 3 seconds. 3. READ DIAGNOSTIC CODE
(a) Turn the ignition switch on.
(b) Disconnect the check connector from the actuator.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±68

Deceleration sensor
Deceleration sensor installation
Wire harness and connector of
deceleration sensor
Pump motor of actuator locked or open circuit in pump motor
circuit in actuatorActuator inside wire harness
Pump motor relay
Wire harness and connector
of pump motor relay circuit Actuator inside wire harness
Solenoid relay
Wire harness and connector of solenoid
relay circuit
Speed sensor
Sensor rotor
Wire harness and connector of
speed sensor
Pump motor, relay and battery
Wire harness, connector and ground
bolt or actuator pump motor circuit Open or short circuit in 3 position solenoid of front right wheel
Actuator solenoid
Wire harness and connector of
actuator solenoid circuit Open or short circuit in 3 position solenoid of rear right wheel Open or short circuit in 3 position solenoid of front left wheel
Open or short circuit in 3 position solenoid of rear left wheel
Open circuit in front left or rear right wheel speed sensor
Open circuit in front right or rear left wheel speed
sensorRear right wheel speed sensor signal malfunction
Abnormally high battery voltage 0 6.2 V or higher) Front right wheel speed sensor signal malfunction
Front left wheel speed sensor signal malfunction
Rear left wheel speed sensor signal malfunction
Open or short circuit in deceleration sensor Short circuit in pump motor relay circuit Open circuit in pump motor relay circuit
Low battery voltage (9.5 V or lower) Open circuit in solenoid relay circuit
Short circuit in solenoid relay circuit
DIAGNOSTIC CODE
Battery
Voltage regulator
Malfunction in deceleration sensorWrong both rear axle hubs
Malfunction in computerRear sensor rotors
Computer Light Pattern
Trouble Part Diagnosi
s Code No.
± BRAKE SYSTEMlock Brake System (A.B.S.)BR±69

Is there battery voltage between comput-
er terminal STP and body ground when
depressing brake pedal?Does warning light show the diagnostic
normal code? (ignition switch on)
Open circuit in stop light switch and/or
wire harness. Disconnect check connector.
(See page BR±68) Anti±lock brake system works inefficiently.
See diagnostic code.
(See page BR±69)
Inspect actuator.
(See page BR±84)YESYES
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±76

Speed Sensor Diagnosis System
PRECAUTION
While checking the speed sensor diagnosis system,
A.B.S. does not work and brake system works as normal
brake system.
INSPECTION OF DIAGNOSIS SYSTEM
1. INSPECT BATTERY VOLTAGE
Inspect that the battery voltage is about 12 V.
2. CHECK THAT WARNING LIGHT TURNS ON
(a) Turn the ignition switch on.
(b) Check that the ºANTILOCKº warning light turns on for
3 seconds.
If not, inspect and repair or replace the fuse, bulb and wire
harness.
(c) Check that the ºANTILOCKº warning light turns off.
(d) Turn the ignition switch off.
3. PERFORM FOLLOWING STEPS
(2WD)
(a) Disconnect the check connector from the actuator.
(b) Pull the parking brake lever up, and start the engine.
(d) Check that the warning light blinks about 4 times ev-
ery 1 second as shown. (c) Depress the brake pedal 4 to 6 times within 2
seconds.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±77

Deceleration Sensor Operation
Diagnosis System (For 4WD)
PRECAUTION
While checking the deceleration sensor diagnosis
system, A.B.S. does not work and brake system works as
normal brake system.
INSPECTION OF DIAGNOSIS SYSTEM
1. INSPECT BATTERY VOLTAGE
Inspect that the battery voltage is about 12 V.
2. CHECK THAT WARNING LIGHT TURNS ON
(a) Turn the ignition switch on.
(b) Check that the ºANTILOCKº warning light turns on for
3 seconds.
If not, inspect and repair or replace the fuse, bulb and wire
harness.
(e) Check that the ºANTILOCKº warning light turns off.
(d) Turn the ignition switch off.
3. PERFORM FOLLOWING STEPS
(a) Remove the rubber cap from the Ts connector lo-
cated in front of the actuator.
(b) Connect the terminals of Ts connector.
(c) Pull the parking brake lever up and depress the brake
pedal, and start the engine.
4. INSPECT SENSOR DETECTION POINT
(a) Jack up the rear side of the vehicle slowly as shown.
HINT: When measuring the height, measure at the center
of the rear bumper lower edge.
(b) Check that the warning light does not turn on.
(c) Jack down the vehicle and check that the warning
light blinking. (d) Check that the warning light blinks about 1 time every
1 second as shown.
If the warning light does not blink, inspect the parking brake
switch, stop light switch, Ts connector, deceleration sensor
installation and computer.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±82

INSPECTION OF A.B.S. ACTUATOR
OPERATION
1. INSPECT BATTERY VOLTAGE
Battery voltage: 10 ± 14.5 V
A.B.S. Actuator
COMPONENTS
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±84

3. CONNECT ACTUATOR CHECKER (SST) TO
ACTUATOR
(a) Connect the actuator checker (SST) to the actuator
and body side wire harness through the sub±wire
harness (SST) as shown.
SST 09990±00150
(b) Connect the red cable of the checker to the battery
positive i
+y terminal and black to the negative (±¿ter-
minal. Connect the black cable of the sub±wire har-
ness to the battery negative (±) terminal or body
ground.
(c) Place the ºSHEET Aº (SST) on the actuator checker.
SST 09990±00163
4. INSPECT BRAKE ACTUATOR OPERATION
(a) Start the engine, and run it at idle.
(b) Turn the selector switch of the actuator checker to
ºFRONT RHº position.
(c) Push and hold in the MOTOR switch for a few sec-
onds.
(d) Depress the brake pedal and hold it until the step 1gf
is completed.
(e) Push the POWER SWITCH, and check that the
brake pedal does not go down.
NOTICE: Do not keep the POWER SWITCH pushing more
than 10 seconds.
(f) Release the switch, and check that the pedal goes
down. 2. DISCONNECT CONNECTORS FROM ACTUATOR
Disconnect the three connectors from the actuator as
shown.
(g) Push and hold in the MOTOR switch for a few sec-
onds, and check that the pedal returns.
(h) Release the brake pedal.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±85