Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » C Code Charts » C1147  
 
 
  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.
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.

  

  1. 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".
  1. 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 >>

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.

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 See: Brakes and Traction Control\Antilock Brakes / Traction Control Systems\Steering Angle Sensor\Testing and Inspection\Description.
>> END