Yaw Rate/Side/Decel G Sensor System Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Sudden turns (such as spin turns, acceleration turns), drifting, etc. when VDC function is OFF may cause the yaw rate/side/decel G sensor system to indicate a problem. This is not a problem if normal operation can be resumed after restarting the engine.

INSPECTION PROCEDURE

SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.

YAW RATE/SIDE/DECEL G SENSOR SYSTEM - SELF-DIAGNOSIS RESULTS

Self-diagnosis results
YAW RATE SENSOR
LONGITUDINAL G-SENSOR
LATERAL G-SENSOR

CAUTION: If vehicle is on turn table at entrance to parking garage, or on other moving surface, VDC OFF indicator lamp may illuminate and CONSULT-II 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.

Is the above displayed in the self-diagnosis display items?

YES: GO TO 2.
NO: Inspection End.

CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and yaw rate/side/decel G sensor connector M108.

Check the terminals for deformation, disconnection, looseness or damage.

OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace as necessary.
YAW RATE/SIDE/DECEL G SENSOR HARNESS INSPECTION
1. Turn off the ignition switch and disconnect yaw rate/side/decel G sensor connector M108 and ABS actuator and electric unit (control unit) connector E125.
2. Check continuity between the ABS actuator and electric unit (control unit) connector E125 and the yaw rate/side/decel G sensor connector M108.
  
  Fig 1: ABS Actuator And Electric Unit And Yaw Rate/Side/Decel G Sensor Connector Continuity Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace as necessary.

YAW RATE/SIDE/DECEL G SENSOR INSPECTION

Connect the yaw rate/side/decel G sensor connector M108 and ABS actuator and electric unit (control unit) connector E125.

Use "DATA MONITOR" to check if the yaw rate/side/decel G sensor signals are normal.

YAW RATE/SIDE/DECEL G SENSOR INSPECTION

Vehicle status	Yaw rate sensor (Data monitor standard)	Side G sensor (Data monitor standard)	Decel G Sensor (Data monitor standard)
When stopped	-4 to +4 deg/s	-1.1 to +1.1 m/s	-0.11 G to +0.11 G
Right turn	Negative value	Negative value	-
Left turn	Positive value	Positive value	-
Speed up	-	-	Negative value
Speed down	-	-	Positive value

OK or NG

OK: Inspection End.
NG: Replace the yaw rate/side/decel G sensor. Refer to "REMOVAL AND INSTALLATION ".