1999 TOYOTA CAMRY relay

DI04G±04
F01177
SLIP Indicator Light
TRAC OFF Indicator Light
ABS Warning Light
DLC1
DLC2
Rear Speed Sensor
Sensor Rotor ABS & TRAC ActuatorABS & TRAC ECU
TRAC OFF Switch
ABS & TRAC
Solenoid Relay
ABS & TRAC
Motor RelaySensor Rotor
Front Speed Sensor
Stop Light Switch Front Speed Sensor
DI±580
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
815 Author: Date:
PARTS LOCATION

DI04J±04
F03951
ABS & TRAC Solenoid Relay
Battery
MAINB±G1F4 ALT1F5 B±G
FL
BlockW±B
EA 3 ABS
12
3 Engine Room R/B No. 3
1
2
336
4
53
3
3
W±L
A8
4ABS & TRAC
Actuator
ABS & TRAC
ECU
5
A8R
A1510
AST GR
GR±RABS & TRAC
ECU
11
A15
1
A15SR
R+
DLC1 DI±584
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
819 Author: Date:
CIRCUIT INSPECTION
DTC 11, 12 ABS & TRAC Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS & TRAC 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
Condition 1. to 3. are detected:
1. Malfunction of solenoid relay monitor
2. Battery voltage will not exceed more than 17.0 V within
2.16 sec.
3. Battery voltage will not become less than 9.5 V within
2.16 sec., or after the solenoid relay is ON and AST
voltage of ECU terminal does not become 8.0 V or more.

ABS & TRAC solenoid relay

ABS & TRAC solenoid relay circuit

ECU
12
Solenoid relay is OFF in the midst of premain routine, and
AST voltage of ECU terminal is 8.0 V or more, which con-
tinues for 2.04 sec. or more.
Fail safe function:
If any trouble occurs in the ABS & TRAC solenoid relay circuit, the ECU cuts off current to the ABS & TRAC
solenoid relay and prohibits ABS control and TRAC control.
WIRING DIAGRAM

F00182
(+)(±)
(+)(±)
(+)(±)(+)(±)
123
456
Engine Room R/B No. 3
F00055
ABS & TRAC
Solenoid
Relay
A15
AST
4
5
ABS & TRAC
Actuator
ECU
ABS & TRAC
Solenoid
Relay
A15
AST
4
5
ABS & TRAC
Actuator
ECU
ABS & TRAC
Solenoid
Relay
A15
AST
4
5
ABS & TRAC
Actuator
ECU
ABS & TRAC
Solenoid
Relay3
A8
A8
A15
AST
4
5
ABS & TRAC
Actuator
ECUEngine Room R/B No. 3
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±585
820 Author: Date:
INSPECTION PROCEDURE
1 Check voltage between terminals 1 and 2 of Engine Room R/B No. 3 (for ABS &
TRAC solenoid relay).
PREPARATION:
Remove ABS & TRAC solenoid relay from Engine Room R/B
No. 3.
CHECK:
Measure the voltage between terminals 1 and 2 of Engine
Room R/B No. 3 (for ABS & TRAC solenoid relay).
OK:
Voltage: 10 ± 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminal 3 of ABS & TRAC solenoid relay and terminal
AST of ABS & TRAC ECU.
CHECK:
Check continuity between terminal 3 of Engine Room R/B No.
3 (for ABS solenoid relay) and terminal AST of ABS & TRAC
ECU.
OK:
Continuity
HINT:
There is a resistance of 4 ~ 6 W between terminals A8 ± 4 and
A8 ± 5 of ABS actuator.
NG Repair or replace harness or ABS & TRAC
actuator.
OK

F00042
1
2 3
4 5 6
1 2 3
4 5 6
1 2 3
4 5 6 Open
Continuity
Continuity
Open Continuity
(+) (±)
DI±586
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
821 Author: Date:
3 Check ABS & TRAC solenoid relay.
CHECK:
Check continuity between each terminal of ABS & TRAC sole-
noid relay.
OK:
Terminals 4 and 6Continuity (Reference value 80 W)
Terminals 2 and 3Continuity
Terminals 1 and 3Open
CHECK:
(a) Apply battery positive voltage between terminals 4 and 6.
(b) Check continuity between each terminal of ABS & TRAC
solenoid relay.
OK:
Terminals 2 and 3Open
Terminals 1 and 3Continuity
NG Replace ABS & TRAC solenoid relay.
OK
4 Check for open and short circuit in harness and connector between ABS &
TRAC solenoid relay and ABS & TRAC ECU (See page IN±31).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.

F03413
Battery2
Engine Room R/B No. 3
MAIN B±G F4F5
FL
BlockABS
12
3
1ALT1
31 B±GABS & TRAC
Motor Relay
4
33
3GR±L
GR±R24
A15
1
A15ABS & TRAC ECU
MR
R+
MT
A1514
R±W
A83 ABS & TRAC Actuator
W±R2
A8
1
A8
W±B
EA
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±587
822 Author: Date:
DTC 13, 14 ABS & TRAC Motor Relay Circuit
CIRCUIT DESCRIPTION
The ABS & TRAC motor relay supplies power to the ABS & TRAC pump motor. While the ABS is activated,
the ECU switches the ABS & TRAC motor relay ON and operates the ABS & TRAC pump motor.
DTC No.DTC Detecting ConditionTrouble Area
13
Conditions 1. to 3. are detected:
1. Malfunction of motor relay monitor
2. Battery voltage will not exceed more than 17.0 V within
2.16 sec.
3. Battery voltage will not become less than 9.5 V within
2.16 sec., or after the motor relay is ON and motor relay
monitor does not ON.

ABS & TRAC motor relay

ABS & TRAC motor relay circuit

ECU
14Motor relay is OFF, and motor relay monitor is ON , which
continues for 20.16 sec. or more.
Fail safe function:
If any trouble occurs in the ABS & TRAC motor relay circuit, the ECU cuts off current to the ABS & TRAC
solenoid relay and prohibits ABS control and TRAC control.
WIRING DIAGRAM
DI04K±04

F00049
1
2
34 (+) (±)
Engine Room
R/B No. 31
2
34 (+) (±)
Engine Room
R/B No. 31
2
34 (+) (±)
Engine Room
R/B No. 31
2
34 (+) (±)
Engine Room
R/B No. 3
F00056
ABS & TRAC
Motor
Relay
M2
A15
MT
32
2
3
ABS & TRAC
Actuator
ECU
ABS & TRAC
Motor
Relay
M2
A15
MT
32
2
3
ABS & TRAC
Actuator
ECU
ABS & TRAC
Motor
Relay
M2
A15
MT
32
2
3
ABS & TRAC
Actuator
ECU
A8
ABS & TRAC
Motor
Relay
A8 M2
A15
MT
32
2
3
ABS & TRAC
Actuator
ECUEngine Room R/B
No. 3
DI±588
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
823 Author: Date:
INSPECTION PROCEDURE
1 Check voltage between terminal 1 of Engine Room R/B No. 3 (for ABS & TRAC
motor relay) and body ground.
PREPARATION:
Remove ABS & TRAC motor relay from Engine Room R/B No.
3.
CHECK:
Measure voltage between terminal 1 of Engine Room R/B No.
3 (for ABS & TRAC motor relay) and body ground.
OK:
Voltage: 10 ± 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminal 2 of ABS & TRAC motor relay and terminal
MT of ABS & TRAC ECU.
CHECK:
Check continuity between terminal 2 of Engine Room R/B No.
3 (for ABS & TRAC motor relay) and terminal MT of ABS &
TRAC ECU.
OK:
Continuity
HINT:
There is a resistance of 4 ~ 6 W between terminals A8 ± 2 and
A8 ± 3 of ABS & TRAC actuator.
NG Repair or replace harness or ABS & TRAC
actuator.
OK

F00044
1 2
3 4
1 2
3 4
1 2
3 4 ContinuityOpen
Continuity
(+) (±)
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±589
824 Author: Date:
3 Check ABS & TRAC motor relay.
CHECK:
Check continuity between each terminal of ABS & TRAC motor
relay.
OK:
Terminals 3 and 4Continuity (Reference value 62 W)
Terminals 1 and 2Open
CHECK:
(a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals of ABS & TRAC mo-
tor relay.
OK:
Terminals 1 and 2Continuity
NG Replace ABS & TRAC motor relay.
OK
4 Check for open and short circuit in harness and connector between ABS &
TRAC motor relay and ABS & TRAC ECU (See page IN±31).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.

DI±590
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
825 Author: Date:
DTC 21 to 28 ABS & TRAC 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

ABS actuator

SFRR or SFRH circuit

ECU
22

ABS actuator

SFLR or SFLH circuit

ECU
23Conditions 1. and 2. or 3. continue for 0.48 sec. or more:
1 Recoveryprohibit runpulse is not output solenoid relay

ABS actuator

SRRR or SRRH circuit

ECU
24
1. Recovery prohibit run pulse is not output, solenoid relay
is ON, AST voltage of ECU terminal is 8.0 V or more,
and solenoid output has no change between the last
time and this time.
ABS actuator

SRLR or SRLH circuit

ECU
25
time and this time.
2. Solenoid output is ON, pressure holding solenoid moni-
tor voltage is more than 1.0 V or pressure eduction sole-
noid monitor voltage is more than 1.5 V.

ABS actuator

SMC1 circuit

ECU
26
g
3. Solenoid output is OFF, solenoid monitor voltage is more
than ±1.0 V AST voltage of ECU.
ABS actuator

SMC2 circuit

ECU
27

ABS actuator

SRC1 circuit

ECU
28

ABS actuator

SRC2 circuit

ECU
Fail safe function:
If any trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the ABS & TRAC solenoid
relay and prohibits ABS control and TRAC control.
DI04L±04