Toyota Camry Manual page 970

BR–284
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.
Diagnostic Trouble Code Detecting Condition
DTC No.
Conditions (1) through (3) continue for 0.05 sec.
or more:
(1) ABS control (solenoid) relay terminal (SR)
(2) Voltage of ABS ECU terminal
(3) When power transistor of ECU is ON, voltage
Conditions (1) through (3) continue for 0.05 sec.
or more:
(1) ABS control (solenoid) relay terminal (SR)
(2) Voltage of ABS ECU terminal
(3) When power transistor of ECU is ON, voltage
Conditions (1) through (3) continue for 0.05 sec.
or more:
(1) ABS control (solenoid) relay terminal (SR)
(2) Voltage of ABS ECU terminal
(3) When power transistor of ECU is ON, voltage
Conditions (1) through (3) continue for 0.05 sec.
or more:
(1) ABS control (solenoid) relay terminal (SR)
(2) Voltage of ABS ECU terminal
(3) When power transistor of ECU is ON, voltage
Fail safe function: If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the
control (solenoid) relay and prohibits ABS control.
DIAGNOSTIC CHART
Check ABS actuator solenoid.
Check for open and short in harness and con–
nector between ECU and actuator.
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
voltage: Battery positive voltage
AST: Battery positive voltage
of terminal SFR is 0 V or battery positive voltage.
voltage: Battery positive voltage
AST: Battery positive voltage
of terminal SFL is 0 V or battery positive voltage.
voltage: Battery positive voltage
AST: Battery positive voltage
of terminal SRR is 0 V or battery positive voltage.
voltage: Battery positive voltage
AST: Battery positive voltage
of terminal SRL is 0 V or battery positive voltage.
– ANTI–LOCK BRAKE SYSTEM (ABS)
Trouble area
ABS actuator.
Open or short in SFR circuit.
ECU.
ABS actuator.
Open or short in SFL circuit.
ECU.
ABS actuator.
Open or short in SRR circuit.
ECU.
ABS actuator.
Open or short in SRL circuit.
ECU.
Replace ABS actuator.
Repair or replace harness or connector.