Diagnosis Procedure

1.CHECK CONNECTOR

Disconnect 12V battery negative terminal.
Check the brake vacuum sensor harness connector for disconnection or looseness.
Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

Is the inspection result normal?

Repair / replace harness or connector.

2.CHECK TERMINAL

Disconnect brake vacuum sensor harness connector.
Check the brake vacuum sensor terminals for damage or loose connection with harness connector.
Disconnect ABS actuator and electric unit (control unit) harness connector.
Check the ABS actuator and electric unit (control unit) terminals for damage or loose connection with harness connector.

Is the inspection result normal?

Repair / replace harness, connector, or terminal.

3.CHECK BRAKE VACUUM SENSOR CIRCUIT

Brake vacuum sensor	ABS actuator and electric unit (control unit)	Continuity
E167	1	E125	45	Existed
2	28
3	17

Is the inspection result normal?

Repair / replace harness or connector.

4.REPLACE BRAKE VACUUM SENSOR

With M.U.T.-III SE

Connect ABS actuator and electric unit (control unit) harness connector.
Replace the brake vacuum sensor. Refer to Removal and InstallationRemoval and installation.
Connect 12V battery negative terminal.
Erase self-diagnosis result for “ABS”.
Ignition switch OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).
Start engine.
note Wait at least 10 seconds after start the engine.
Perform self-diagnosis for “ABS”.

Is DTC “C1073-55” detected?

Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation

INSPECTION END