TOYOTA RAV4 1996 Service Repair Manual

W01937
2
29 10
6 WA8
A9
A9
A8A9
A7 A7
2 25
4 L
R 2
6
A9 A8A84
3
1
A17
A16 A16
A17 A17 A16
*
1*2
15 8
18 5
11 16
98 3
5 A7
A7 EA
EBA71
W−B ALTW−BR−B
R−W
R−L
ABS ActuatorABS ECU Solenoid
RelayABS ECU
MR
R−*1
R+*2
SR
AST
MT BatteryW−R
A17
A17A16
A16 W−BW−BW−R
W−R
ABS1
W−B
ABS Control Relay
Motor
Relay
DLC1
*
1: 2WD Models
*2: 4WD Models
F7
Fusible
Link
Block
G−W
L−O R/B
No. 24 7
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−251
1996 RAV4 (RM447U)
WIRING DIAGRAM

BE6053R14667F06997
LOCK
A8
1
(+)
(−)
W01413
DI−252
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check voltage between terminal A8−1 of ABS control (motor) relay and body
ground.
PREPARATION:
Disconnect the ABS control relay connector.
CHECK:
Measure the voltage between terminal A8−1 of the ABS control
relay harness side connector and body ground.
OK:
Voltage: 10 − 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminals A8−2 and A7−2, A7−2 and A7−5, and A7−5
and A16−8/A17−9.
PREPARATION:
Disconnect the 2 connectors from the ABS actuator.
CHECK:
Check continuity between terminal A8−2 and A7 − 2, A7 − 2 and
A7−5, and A7−5 and A16−8/A17−9.
OK:
Continuity
HINT:
There is a resistance of 26 − 40 Ω between terminals A7−2 and
A7−5.
NG Repair or replace harness or ABS actuator.
OK

F04137
A8A9
A8A9
(−) (+)1
3 2
42
4
31
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−253
1996 RAV4 (RM447U)
3 Check ABS control (motor) relay.
CHECK:
Check the continuity between each terminal of the ABS control
relay.
OK:
Terminals A8−3 and A8−4Continuity
(Reference value 68 Ω)
Terminals A8−1 and A8−2Open
CHECK:
(a) Apply battery voltage between terminals A8−3 and A8−4.
(b) Check the continuity between terminal of the ABS control
relay.
OK:
Terminals A8−1 and A8−2Continuity
NG Replace ABS control relay.
OK
4 Check for open and short in harness and connector between ABS control relay
and ABS ECU (See page IN−30).
NG Repair or replace harness or connector.
OK
If same code is still output after DTC is deleted, check contact condition of each connection. If
connections are normal, ECU may be defective.

DI−254
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
DTC 21, 22, 23, 24 ABS Actuator Solenoid Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders, thus controlling the braking force.
DTC No.DTC Detecting ConditionTrouble Area
21
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. Voltage of ABS ECU terminal AST: Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SFRR or SFRH is 0 V or battery positive voltage
ABS actuator
Open or short in SFRR or SFRH circuit
ECU
22
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. Voltage of ABS ECU terminal AST: Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SFLR or SFLH is 0 V or battery positive voltage
ABS actuator
Open or short in SFLR or SFLH circuit
ECU
23
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. Voltage of ABS ECU terminal AST: Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SRRR or SRRH is 0 V or battery positive voltage
ABS actuator
Open or short in SRRR or SRRH circuit
ECU
24
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. Voltage of ABS ECU terminal AST: Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SRLR or SRLH is 0 V or battery positive voltage
ABS actuator
Open or short in SRLR or SRLH circuit
ECU
Fail safe function:
If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the ABS control (solenoid) relay
and prohibits ABS control.
DI41L−02

W03159
*1*2
*1: 2WD Models
*2: 4WD Models*
1*2
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−255
1996 RAV4 (RM447U)
WIRING DIAGRAM

W00714
8
7
651 2
3
4
4
A7
A6
DI−256
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check ABS actuator solenoid.
PREPARATION:
Disconnect the 2 connectors from the ABS actuator.
CHECK:
Check the continuity between terminals A7−4 and A6−1, 2, 3,
4, 5, 6, 7, 8 of the ABS actuator connector.
OK:
Continuity
HINT:
Resistance of each of the solenoids SFRH, SFLH, SRRH
and SRLH is 5.0 Ω (4WD models) or 8.8 Ω (2WD models).
Resistance of each of the solenoids SFRR, SFLR, SRRR
and SRLR is 2.2 Ω (4WD models) or 4.3 Ω (2WD models).
NG Replace ABS actuator.
OK
2 Check for open and short in harness and connector between ABS ECU and ac-
tuator (See page IN−30).
NG Repair or replace harness or connector.
OK
If same code is still output after DTC is deleted, check contact condition of each connection. If
connections are normal, ECU may be defective.

BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
Low Speed High SpeedN S
+V
−V
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−257
1996 RAV4 (RM447U)
DTC 31, 32, 33, 34, 35 Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects the wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS system. The front and rear rotors each have 48 serra-
tions.
When the rotor rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
31, 32, 33, 34
Detection of any of conditions 1 through 3:
1. At vehicle speed of 10 km/h (6 mph) or more, pulses are not
input for 5 sec.
2. Momentary interruption of the speed sensor signal occurs
at least 7 times in the time between switching the ignition
switch ON and switching it OFF
3. Abnormal fluctuation of speed sensor signals with the ve-
hicle speed 20 km/h (12 mph) or more
Right front, left front, right rear or left rear speed sensor
Open or short in each speed sensor circuit
Sensor rotor
ECU
*35
Speed sensor signal is not input for about 1 sec. while the
speed sensor signals are being checked at vehicle speed of 0
km/hOpen in speed sensor circuit
ECU
*: 4WD models
HINT:
DTC No. 31 is for the right front speed sensor.
DTC No. 32 is for the left front speed sensor.
DTC No. 33 is for the right rear speed sensor.
DTC No. 34 is for the left rear speed sensor.
Fail safe function:
If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
DI98Z−01

W03168
*2*1
*1: 2WD models
*2: 4WD models*
2
*2
*2
*1
DI−258
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
WIRING DIAGRAM

R14676
21
R14669
1 2
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−259
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check speed sensor.
Front
PREPARATION:
Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector.
OK:
Resistance: 0.6 − 1.8 kΩ
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector and body ground.
OK:
Resistance: 1 MΩ or higher
Rear:
PREPARATION:
Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector.
OK:
Resistance: 0.6 − 2.05 kΩ
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector and body ground.
OK:
Resistance: 1 MΩ or higher
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI−234).
OK
2 Check for open and short in harness and connector between each speed sensor
and ECU (See page IN−30).
NG Repair or replace harness or connector.
OK

R03139
W01942
4WD Models
2WD Models
BR3795
OK
NG
DI−260
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
3 Check sensor rotor and sensor installation
Front:
PREPARATION:
Remove the brake disc (See page SA−20).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
CHECK:
Check the front speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and steering
knuckle.
Rear:
PREPARATION:
Remove the axle shaft (See page SA−52) or drive shaft (See
page SA−62).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and rear axle carri-
er.
NG Replace speed sensor or rotor.
NOTICE:
Check the speed sensor signal last (See page DI−234).
OK
Check and replace ABS ECU.