2000 TOYOTA CAMRY ECU

BR3795
OK NG OK NG
OK NGOK NG
R00948
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±555
790 Author: Date:
2 Check for open and short circuit in harness and connector between each speed
sensor and ECU (See page IN±31).
NG Repair or replace harness or connector.
OK
3 Check speed sensor installation.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and steering
knuckle or rear axle carrier.
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI±539).
OK
4 Check sensor rotor and sensor tip.
Front:
PREPARATION:
Remove the front drive shaft (See page SA±17 or SA±26).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
PREPARATION:
Remove the front speed sensor (See page BR±68).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.

R00947
DI±556
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
791 Author: Date:
Rear:
PREPARATION:
Remove the axle hub (See page SA±52).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
PREPARATION:
Remove the rear speed sensor (See page BR±70).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
NG Replace sensor rotor or speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI±539).
OK
Check and replace ABS ECU.

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±557
792 Author: Date:
DTC 37 Speed Sensor Rotor Faulty
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
37
Detection of any of conditions from 1. through 3.:
1. Occurrence of differential to some degree in the wheel
speed between the front and rear wheels of either left or
right side of the vehicle and the front left and right
wheels. (Detection of differential in mini tire size, spin-
ning wheel and decelerating wheel.)
2. Continuous ABS control for 60 sec. or more.
3. Interference on 1 or more wheels for 20 sec. with the
brake pedal depressed, or for 5 sec. when the brake
pedal is not depressed.

Speed sensor

Sensor rotor

ECU
INSPECTION PROCEDURE
1 Check sensor rotor (See page DI±552).
NG Replace sensor rotor.
OK
2 Check speed sensor (See page DI±552).
NG Replace speed sensor.
OK
3 Check for open and short circuit in harness and connector between speed sen-
sor and ECU (See page IN±31).
NG Repair or replace harness and connector.
OK
Check and replace ABS ECU.
DI044±04

F03950
Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly L
IG1
BatteryMAINB±G1
F4 ALTFL
Block 1F5 B±G3
ABS
12
Engine
Room R/B
No.3 3L
18
A617
A6
+B+B
Valve Relay
Motor Relay
GND2
A6
1615
A65
B±R
IK3B±R
C
C
J12 J/C
ECU
GND119
A6W±B
W±B
W±B
EAECU±IG
Instrument
Panel J/B 1J
9 DI±558
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
793 Author: Date:
DTC 41 Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Vehicle speed at about 6 km/h (4 mph), low battery voltage
is less than 9.4 V at the time of non±operation of ABS
control or less than 8.8 V at the time of operation of ABS
control, and high battery voltage is more than 17.4 V.
Battery

Charging system

Power source circuit

ECU
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid valve relay and
prohibits ABS control.
WIRING DIAGRAM
DI045±08

F00073
ECU±IG
Instrument
Panel J/BECU±IG
Instrument
Panel J/BECU±IG
Instrument
Panel J/B
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±559
794 Author: Date:
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove ECU±IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short circuit in all the harness and
components connected to ECU±IG fuse (See
the attached wiring diagram.)
OK
2 Check battery positive voltage.
OK:
Voltage: 10 ± 14 V
NG Check and repair the charging system
5S±FE engine: (See page CH±1)
1MZ±FE engine: (See page CH±1).
OK

F00067
IG1
GND ON
(+) (±) IG1
GND ON
(+) (±) IG1
GND ON
(+) (±)IG1
GND ON
(+) (±)
F00068
LOCK
GND (+)
(±) LOCK
GND (+)
(±) LOCK
GND (+)
(±)LOCK
GND (+)
(±)
DI±560
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
795 Author: Date:
3 Check voltage between terminals IG1 and GND of ABS actuator connector.
PREPARATION:
Disconnect ABS actuator connector.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals IG1 and GND of ABS
actuator harness side connector.
OK:
Voltage: 10 ± 14 V
OK Check and replace ABS ECU.
NG
4 Check continuity between terminals GND of ABS actuator connector and body
ground.
CHECK:
Measure resistance between terminal GND of ABS actuator
harness side connector and body ground.
OK:
Resistance: 1 W or less
NG Repair or replace harness or connector.
OK
Check for open circuit in harness and connector between ABS ECU and ECU±IG
(See page IN±31).

F00125
MAIN
Battery ALT F4B±R
F91B
1C
STOP
B±G4
1 Instrument Panel J/B
FL Block
1 7 WA6
21S 5IK3 J28
G±WECU
J27
1RSTP
Stop Light SwitchJ/C
7
G±R
H10Light Failure
Sensor R
W±B A
R9 R11 C14
BP BL 11R
2
4
G±W G±W G±WG±W 1
Instrument
Panel J/B
2 1
G±RG±R
W±B W±B
W±B H10R9
R11
J/C
A A High
Mounted
Stop
LightRight
Stop
LightLeft
Stop
Light
J405 2
12
2
5
W±B
W±B
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±561
796 Author: Date:
DTC 58 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
49
Stop light switch circuit is open, and stop light switch
voltage is in the level between 65 % or more and less
than 93 % of the battery voltage.
Stop light switch

Stop light switch circuit

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±36).
OK
DI046±09

F00069
STP (+) (±)
DI±562
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
797 Author: Date:
2 Check voltage between terminal STP of ABS actuator and body ground.
PREPARATION:
Disconnect ABS actuator connector.
CHECK:
Measure voltage between terminal STP of ABS actuator har-
ness side connector and body ground when brake pedal is de-
pressed.
OK:
Voltage: 8 ± 14 V
OK Check and replace ABS ECU.
NG
3 Check for open circuit in harness and connector between ABS ECU and stop
light switch (See page IN±31).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on problem symptoms table (See page DI±545).