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 DIAGNOSTIC RESULT
With CONSULT-III.
1. Turn the ignition switch OFF to ON.
2. Perform self diagnostic result.
Is DTC C1147, C1148, C1149 or C1150 detected?
YES - Proceed to diagnosis procedure. C1147.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, Coupe or Brake Control System Sedan With VDC/TCS/ABS.
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 diagnostic result. VDC/TCS/ABS.
Is the inspection result normal?
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 E54 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 E54 terminal 1, 4 and ground.





Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit). Removal And Installation VDC/TCS/ABS.
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 "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). Service and Repair.
- END