Toyota Camry Manual page 849

DTC 21, 22, 23 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.
Diagnostic Trouble Code Detecting Condition
DTC No.
(1) OV is applied to terminal SFR for 0.035 sec.
(2) Battery voltage is applied to terminal SFR for
and the ECM power transistor is ON.
(1) OV is applied to terminal SFL for 0.035 sec.
(2) Battery voltage is applied to terminal SFL for
and the ECM power–transistor is ON.
(1) OV is applied to terminal SRA for 0.035 sec.
while battery voltage is applied to the sole–
noid voltage monitor terminal (AST) and the
ECM power transistor is OFF.
(2) Battery voltage is applied to terminal SRA for
0.035 sec. while battery voltage is applied to
the solenoid voltage monitor terminal (AST)
and the ECM power transistor is ON.
Fail safe function; If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the
solenoid relay and prohibits ABS control.
Check ABS actuator solenoid.
If the same code is still output after the diagnostic trouble code is deleted, check the contact condition
of each connection.
If the connections are normal, the ECU may be defective.
BRAKE SYSTEM
while battery voltage is applied to the sole–
noid voltage monitor terminal (AST) and the
ECM power transistor is OFF.
0.035 sec. while battery voltage is applied to
the solenoid voltage monitor terminal (AST)
while battery voltage is applied to the sole–
noid voltage monitor terminal (AST)and the
ECM power transistor is OFF.
0.035 sec. while battery voltage is applied to
the solenoid voltage monitor terminal (AST)
– ANTI–LOCK BRAKE SYSTEM (ABS)
Trouble area
ABS actuator (solenoid valve).
Open or short in right front solenoid circuit.
ECU.
ABS actuator (solenoid valve).
Open or short in left front solenoid circuit.
ECU.
ABS actuator (solenoid valve).
Open or short in rear solenoid circuit.
ECU.
Replace ABS actuator.
BR–163