TOYOTA RAV4 1996 Service Repair Manual

− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−271
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI−234.
YES Repair circuit indicated by code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short in
harness and connector between ABS solenoid
relay and DLC1 (See page IN−30).
NO
3 Is ABS warning light go off?
YES Check for open or short in harness and connec-
tor between ECU−IG Fuse and ECU (See page
IN−30).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 − 16 V
NG Check and repair charging system.
OK

DI−272
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
5 Check ABS warning light.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the ABS ECU.
(c) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS ECU.
NG
Check for short in harness and connector between combination meter and ABS ECU, and com-
bination meter and DLC1 (See page IN−30).

W03162
*2*1
*1: 2WD models
*2: 4WD models
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−273
1996 RAV4 (RM447U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
This stop light switch senses whether the brake pedal is depressed or released, and sends a signal to the
ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is released.
NG Repair stop light circuit (See page BE−2).
OK
DI41R−02

W01410
R15785F15320
STP (−)
(+) 2WD Models
4WD Models
(−)
(+)
STP
DI−274
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
2 Check voltage between terminal STP of ABS ECU and body ground.
PREPARATION:
Remove the ABS ECU with connectors still connected.
CHECK:
Measure the voltage between terminal STP of the ABS ECU
and body ground when the brake pedal is depressed.
OK:
Voltage: 8 − 14 V
OK Proceed to next circuit inspection shown on
Problem symptoms table (See page DI−245).
NG
3 Check for open in harness and connector between ABS ECU stop light switch
(See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

W01941
*2*1
*1: 2WD models
*2: 4WD models
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−275
1996 RAV4 (RM447U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory. After removing the short pin of the DLC1, connect terminals
Tc and E1 of the DLC1 to make the ABS warning light blink and output the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
Troubleshooting in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See combination meter troubleshooting on page BE−2.
NG Replace bulb or combination meter assembly.
OK
DI98X−01

R14139
1 2
5 6 3A8
A9
R14140
(−)
(+)1 2
5
6
3A8
A9
R14144
(+) (−)4 5 A8
A9
DI−276
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
2 Check ABS control relay.
PREPARATION:
Disconnect the connectors from the control relay.
CHECK:
Check the continuity between each terminal of the ABS control
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 relay.
OK:
Terminals A9−5 and A9−6Open
Terminals A9−2 and A9−5Continuity
CHECK:
Connect the  test lead to terminal A9−4 and the  lead to ter-
minal A9−5. Check the continuity between the terminals.
OK:
Continuity
If there is no continuity, connect the  test lead to ter-
minal A9−4 and the  lead to terminal A9−5. Recheck
the continuity between the terminals.
NG Replace ABS control relay.
OK
Check for open in harness and connector between DLC1 and ABS control relay and body ground
(See page IN−30).

− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−277
1996 RAV4 (RM447U)
3 Is DTC output?
Check DTC on page DI−234.
YES Repair circuit indicated by code output.
NO
4 Does ABS warning light go off if short pin is removed?
NO Check for short in harness and connector be-
tween warning light and DLC1 and ECU (See
page IN−30).
YES
5 Check ABS control relay (See step No. 2).
NG Replace ABS control relay.
OK
Check for short in harness and connect be-
tween DLC1 and ABS control relay (See page
IN−30).

W01418F15322
EC
A
33920
*2*1
W−L
11 Tc E1
ABR BREA1Tc12 V
DLC1 J2
Junction
Connector
*
1: 2WD Models
*2: 4WD ModelsA16 A17 W−LABS ECU
F15316
E1
Tc DLC1
DI−278
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 causes the ECU to display the DTC by flashing the ABS warning
light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Tc and E1 of the
DLC1.
OK:
Voltage: 10 − 14 V
OK If ABS warning light does not blink even after Tc
and E1 are connected, ECU may be defective.
NG
DI41V−02

− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−279
1996 RAV4 (RM447U)
2 Check for open and short in harness and connector between ABS ECU and
DLC1, and DLC1 and body ground (See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

W01418F15322
EC
A
33
*2*111 E1
ABR BREA1
12 V
DLC1 J2
Junction
Connector
*
1: 2WD Models
*2: 4WD ModelsA16 A17ABS ECU
TsTs 8
LL6
F15316
E1
TsDLC1
DI−280
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 RAV4 (RM447U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check. Connecting terminals Ts and E1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
PREPARATION:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and E1 of the
DLC1.
OK:
Voltage: 10 − 14 V
OK If ABS warning light does not blink even after Ts
and E1 are connected, ECU may be defective.
NG
DI41W−02