1996 TOYOTA RAV4 ECU

DI41I−02
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−245
1996 RAV4 (RM447U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
SymptomsSuspected AreaSee page
ABS does not operate
Only when 1 − 4 are all normal and the problem is still occuring, replace the ABS
ECU
2. Check the DTC, reconfirming that the normal code is output
3. IG power source circuit
4. Speed sensor circuit
5. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−282)
DI−234
DI−262
DI−257
BR−35
ABS does not operate effi-
ciently
Only when 1 − 4 are all normal and the problem is still occuring, replace the ABS
ECU
1. Check the DTC, reconfirming that the normal code is output
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−282)
DI−234
DI−257
DI−273
BR−35
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI−275
−
DTC check cannot be done
Only when 1 and 2 are all normal and the problem is still occuring, replace the ABS
ECU
1. ABS warning light circuit
2. Tc terminal circuit
DI−275
DI−278
Speed sensor signal check
cannot be done1. Ts terminal circuit
2. ABS ECUDI−280
−

DI41J−02
DI−246
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
CIRCUIT INSPECTION
DTC 11, 12 ABS Control (Solenoid) Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
Conditions 1 and 2 continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. ABS control (solenoid) relay monitor terminal (AST) voltage:
0 V
ABS control (solenoid) relay
Open or short in ABS control (solenoid) relay circuit
ECU
12
Conditions 1 and 2 continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
2WD models: 0 V
4WD models: 10 − 14 V
2. ABS control (solenoid) relay monitor terminal (AST) voltage:
10 − 14 V
ABS control (solenoid) relay
B+ short in ABS control (solenoid) relay circuit
ECU
Fail safe function:
If trouble occurs in the ABS control (solenoid) relay circuit, the ECU cuts off current to the ABS control (sole-
noid) relay and prohibits ABS control.

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−247
1996 RAV4 (RM447U)
WIRING DIAGRAM

F04134
A8A9
A8A9
(+)
(−)
31
3
65 2
1
65 2
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−249
1996 RAV4 (RM447U)
3 Check ABS control (solenoid) relay.
CHECK:
Check the continuity between each terminal of the ABS control
(solenoid) relay.
OK:
Terminals A9−1 and A8−3Continuity
(Reference value 80 Ω)
Terminals A9−5 and A9−6Continuity
Terminals A9−2 and A9−5Open
CHECK:
(a) Apply battery voltage between terminals A9−1 and A8−3.
(b) Check the continuity between each terminal of the ABS
control (solenoid) relay.
OK:
Terminals A9−5 and A9−6Open
Terminals A9−2 and A9−5Continuity
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−250
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
DTC 13, 14 ABS Control (Motor) Relay Circuit
CIRCUIT DESCRIPTION
This ABS control (motor) relay supplies power to the ABS pump motor. While the ABS is activated, the ECU
switches the control (motor) relay ON and operates the ABS pump motor.
DTC No.DTC Detecting ConditionTrouble Area
13
Conditions 1 and 2 continued for 0.2 sec. or more:
1. ABS control (motor) relay terminal (MR) voltage:
2WD models: 10 − 14 V
4WD models: Below 1.5 V
2. ABS control (motor) relay monitor terminal (MT) voltage:
0 V
ABS control (motor) relay
Open or short in ABS control (motor) relay circuit
ECU
14
Conditions 1 and 2 continued for 4 sec. or more:
1. ABS control (motor) relay terminal (MR)
2WD models: 0 V
4WD models: 10 − 14 V
2. ABS control (motor) relay monitor terminal (MT) voltage:
Battery positive voltage
ABS control (motor) relay
B+ short in ABS control (motor) relay circuit
ECU
Fail safe function:
If trouble occurs in the ABS control (motor) relay circuit, the ECU cuts off current to the ABS control (solenoid)
relay and prohibits ABS control.
DI41K−02

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

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