DTC C1143, C1156

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS 

   Check the self-diagnostic results.

   SELF-DIAGNOSTIC RESULTS CHART
   
   

   Self-diagnostic results
   ST ANG SEN CIRCUIT
   ST ANG SEN COM CIR

   Is the above displayed in the self-diagnosis item?

   YES : GO TO 2.

   NO : INSPECTION END

2. CHECK CONNECTOR 
   1. Disconnect steering angle sensor connector and ABS actuator and electric unit (control unit) connector and check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
   2. Reconnect connectors and perform an ABS actuator and electric unit (control unit) self-diagnosis again.

   OK or NG 

   OK : Connector terminal contact is loose, damaged, open or shorted.

   NG : GO TO 3.

3. CHECK STEERING ANGLE SENSOR HARNESS 
   1. Check CAN communication circuit. Refer to "CAN Communication Circuit ".
   2. Turn ignition switch OFF and disconnect steering angle sensor connector M14.
   3. Check continuity between steering angle sensor harness connector and ground.
      STEERING ANGLE SENSOR CONTINUITY CHART
      
      

      Steering angle sensor	Ground	Continuity
      2	-	Yes

      Fig 1: Checking Continuity Between Steering Angle Sensor Harness Connector And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
   4. Check voltage between steering angle sensor harness connector and ground.
      STEERING ANGLE SENSOR VOLTAGE CHART
      
      

      Steering angle sensor	Ground	Voltage
      3	-	Battery voltage (Approx. 12 V)

      Fig 2: Checking Voltage Between Steering Angle Sensor Harness Connector And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : GO TO 4.

   NG : If the open or short in harness, repair or replace harness.

4. CHECK STEERING WHEEL PLAY 

   Check steering wheel play. Refer to "CHECKING STEERING WHEEL PLAY ".

   OK or NG 

   OK : GO TO 5

   NG : Adjust steering wheel play.

5. PERFORM DATA MONITOR 
   1. Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
   2. Perform "DATA MONITOR" of the "STEERING ANGLE SIGNAL" to check if the status is normal.
      STEERING ANGLE SIGNAL CHART
      
      

      Steering condition	Data monitor
      Straight-ahead	-3.5 deg - +3.5 deg
      Turn wheel to the right by 90°.	Approx. -90 deg
      Turn wheel to the left by 90°.	Approx. +90 deg

   OK or NG 

   OK : Perform ABS actuator and electric unit (control unit) self-diagnosis again.

   NG : Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION ".