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Diagnosis Procedure
1.CHECK CONNECTOR
  1. Disconnect 12V battery negative terminal.
  2. Check the brake vacuum sensor harness connector for disconnection or looseness.
  3. 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
  1. Disconnect brake vacuum sensor harness connector.
  2. Check the brake vacuum sensor terminals for damage or loose connection with harness connector.
  3. Disconnect ABS actuator and electric unit (control unit) harness connector.
  4. 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
  1. Check the continuity between brake vacuum sensor harness connector and ABS actuator and electric unit (control unit) harness connector.
    Brake vacuum sensorABS actuator and electric unit (control unit)Continuity
    ConnectorTerminalConnectorTerminal
    E1671E12545Existed
    228
    317
  2. Check the continuity between brake vacuum sensor harness connector and ground.
    Brake vacuum sensor—Continuity
    ConnectorTerminal
    E1671GroundNot existed
    2
    3
Is the inspection result normal?
.
Repair / replace harness or connector.
 
4.REPLACE BRAKE VACUUM SENSOR
With M.U.T.-III SE
  1. Connect ABS actuator and electric unit (control unit) harness connector.
  2. Replace the brake vacuum sensor. Refer to Removal and InstallationRemoval and installation.
  3. Connect 12V battery negative terminal.
  4. Erase Diagnostic Trouble Code result for “ABS".
  5. Electric motor switch OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).
  6. Start engine.
    noteWait at least 10 seconds after electric motor switch ON.
  7. Perform Diagnostic Trouble Code for “ABS".
Is DTC “C1073-01" detected?
Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation
INSPECTION END