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DIAGNOSTICS
ANTI
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LOCK BRAKE SYSTEM
DI
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207
1996 LAND CRUISER (RM451U)
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.
DTC No.
DTC Detecting Condition
Trouble Area
21
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
Battery positive voltage
2. Voltage of ABS ECU terminal AST:
Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SFR is 0 V or battery positive voltage
S
ABS actuator
S
Open or short in SFR circuit
22
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
Battery positive voltage
2. Voltage of ABS ECU terminal AST: Battery positive volt-
age
3. When power transistor of ECU is ON, voltage of terminal
SFL is 0 V or battery positive voltage
S
ABS actuator
S
Open or short in SFL circuit
23
Conditions 1 through 3 continue for 0.05 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
Battery positive voltage
2. Voltage of ABS ECU terminal AST:
Battery positive voltage
3. When power transistor of ECU is ON, voltage of terminal
SRR is 0 V or battery positive voltage
S
ABS actuator
S
Open or short in SRR circuit
Fail safe function:
If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the ABS control (solenoid) relay
and prohibits ABS control.
DI5M2
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02
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Brought to you by BirfMark
Version 1.00 - 12/21/2010