Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » C Code Charts » C1143  
 
 
  C1143  
 

C1143, C1144 STEERING ANGLE SENSOR

Description
The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel, and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.

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 STEERING ANGLE SENSOR HARNESS

  1. Check CAN communication system. Refer to See: Powertrain Management\Computers and Control Systems\Information Bus\Testing and Inspection\Initial Inspection and Diagnostic Overview\CAN Fundamental\Trouble Diagnosis Flow Chart.
  2. Turn ignition switch OFF and disconnect steering angle sensor connector.

  

  1. Check continuity between steering angle sensor harness connector M53 terminal 1 and ground.

  

  

  1. Turn ignition switch ON and check voltage between steering angle sensor harness connector M53 terminal 4 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 DATA MONITOR
  1. Turn ignition switch OFF and connect the steering angle sensor connector and ABS actuator and electric unit (control unit) connector.
  2. Select "STR ANGLE SIG" in "Data Monitor" and check steering angle sensor signal.

  

Is the Inspection result normal?
YES >> Perform self-diagnosis.
NO >> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor. Refer to See: Brakes and Traction Control\Antilock Brakes / Traction Control Systems\Steering Angle Sensor\Service and Repair.

  • Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".

Component Inspection
1.CHECK DATA MONITOR
Select "STR ANGLE SIG" in "DATA MONITOR" and check steering angle sensor signal.

  

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\Service and Repair.
>> END