C1147
C1147, C1148, C1149, C1150 USV/HSV LINEDescription
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
C1147-C1150:
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. Refer to "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E26, check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
2. Reconnect connector and perform self-diagnosis.
Is the inspection result normal?
YES >> Inspection end.
NO >> GO TO 2
2. CHECK SOLENOID, VDC CHANGE-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E26.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector E26 terminal 3 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> ^ Repair or replace malfunctioning components.
^ Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".
3. CHECK SOLENOID, VDC CHANGE-OVER VALVE, ACTUATOR RELAY GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control unit) harness connector E26 terminal 1, 4 and ground.
Is the inspection result normal?
YES >> ^ Replace ABS actuator and electric unit (control unit).
^ Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".
NO >> ^ Repair or replace malfunctioning components.
^ Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".
Component Inspection
1. CHECK ACTIVE TEST
1. Select each test menu item on "ACTIVE TEST".
2. On the display, touch "UP", "UP", and "KEEP", and check that the system operates as shown in the table below.
NOTE: The example shown is for front right wheel. The procedure for the other wheels is the same as given below.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to diagnosis procedure. Refer to "Diagnosis Procedure".
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). Refer to BRC-142, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION: Description".
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