C1147

C1147, C1148, C1149, C1150 USV/HSV LINE





Description

USV1, USV2 (CUT VALVE)
The cut valve shuts off the normal brake fluid path from the master cylinder, when VDC/TCS is activated.

HSV1, HSV2 (SUCTION VALVE)
The suction valve supplies the brake fluid from the master cylinder to the pump, when VDC/TCS is activated.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.





Is above displayed on the self-diagnosis display?
YES - Proceed to diagnosis procedure. C1147.
NO - Inspection End




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Antilock Brakes / Traction Control Systems.
1.CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminals.
4. Reconnect connector and perform self-diagnosis. Scan Tool Testing and Procedures.
Is any item indicated on the self-diagnosis display?
YES - GO TO 2
NO - Poor connection of connector terminals. Repair or replace connector.
2.CHECK SOLENOID AND ACTUATOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.





3. Check voltage between ABS actuator and electric unit (control unit) connector E26 terminal 3 and ground.





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace malfunctioning components.
3. CHECK SOLENOID AND ACTUATOR RELAY GROUND CIRCUIT





Check continuity between ABS actuator and electric unit (control unit) connector E26 terminals 1, 4 and ground.





Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit). Removal And Installation.
NO - Repair or replace malfunctioning components.




Component Inspection
1.CHECK ACTIVE TEST
1. Select each test menu item on "ACTIVE TEST".
2. On the display, touch "Up", "ACT UP", and "ACT KEEP", and check that the system operates as shown in the table below.






Is the inspection result normal?
YES - Inspection End
NO - Go to diagnosis procedure. C1147.




Special Repair Requirement
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Special Repair Requirement.
- END