Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » C Code Charts » C1145  
 
 
  C1145  
 

C1145, C1146 YAW RATE/SIDE G SENSOR

Description
The yaw rate/side/decel G sensor detects the yaw rate/side/decel G affecting the vehicle, and transmits the data to the ABS actuator and electric unit (control unit) as an analog voltage signal.

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

CAUTION:

  • Sudden turns (such as spin turns, acceleration turns), drifting, etc., when VDC function is off (VDC OFF switch "ON") may cause yaw rate/side/decel G sensor system to indicate a malfunction. However, this is not a malfunction, if normal operation can be resumed after restarting engine. Then erase memory of self-diagnosis.
  • If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VDC OFF indicator lamp may illuminate and CONSULT-III self-diagnosis may indicate yaw rate sensor system malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turn-table or other moving surface, and start engine. Results will return to normal. And after doing spin turns or acceleration turns with VDC function is being off (VDC OFF switch "ON"), too, the results will return to a normal condition by re-starting vehicle. Inspection PROCEDURE

1.CHECK CONNECTOR

  1. Turn ignition switch OFF and disconnect yaw rate/side/decel G sensor connector M55 and 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 YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY CIRCUIT

  

Turn ignition switch ON, then OFF and check voltage between yaw rate/side/decel G sensor harness connector M55 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 YAW RATE/SIDE/DECEL G SENSOR GROUND SUPPLY CIRCUIT

  

Turn ignition switch OFF and check resistance between yaw rate/side/decel G sensor harness connector M55 terminal 1 and ground.

  

Is the Inspection result normal?
YES >> GO TO 4
NO >>

  • Repair or replace malfunctioning components.
  • Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED". 4.CHECK YAW RATE/SIDE/DECEL G SENSOR HARNESS

  

  1. Check continuity between ABS actuator and electric unit (control unit) harness connector (A) E26 and yaw rate/side/decel G sensor harness connector (B) M55.

  

  1. Check continuity between ABS actuator and electric unit (control unit) harness connector (A) E26 and ground.

  

Is the Inspection result normal?
YES >> GO TO 5
NO >>

  • Repair or replace malfunctioning components.
  • Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED". 5.CHECK DATA MONITOR
  1. Connect the Yaw rate/side/decel G sensor connector and ABS actuator and electric unit (control unit) connector.
  2. Select "YAW RATE SEN", "SIDE G-SENSOR" in "Data Monitor" and check Yaw rate/side/decel G sensor signal.

  

Is the Inspection result normal?
YES >>

Component Inspection
1.CHECK DATA MONITOR
Select "YAW RATE SEN", "SIDE G-SENSOR" in "DATA MONITOR" and check yaw rate/side/decel G 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