Yaw Rate Sensor: Testing and Inspection

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

Yaw Rate/Side/Decel G Sensor System Inspection


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. However this is not a problem if normal operation can be resumed after restarting the engine.

1. SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.






CAUTION:
When on a turntable, such as at a parking structure entrance, or when on a moving object with the engine running, the VDC OFF indicator lamp might turn on and the self-diagnosis using the CONSULT
the yaw rate sensor system might be displayed, but in this case there is no problem with the yaw rate sensor system. As soon as the vehicle leaves the turntable or moving object, restart the engine to return the system to normal.
Is the above displayed in the self-diagnosis display items?
YES- GO TO 2.
NO- Inspection End.

2. CONNECTOR INSPECTION

Disconnect the ABS actuator and electric unit (control unit) and yaw rate/side/decel G sensor connectors.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK- GO TO 3.
NG- Repair or replace as necessary.

3. CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY CIRCUIT






Check voltage between yaw rate/side/decel G sensor connector B3
terminal 4 and ground.





Is the inspection result normal?
YES- GO TO 4
NO- Repair or replace malfunctioning components.

4. CHECK YAW RATE/SIDE/DECEL G SENSOR GROUND SUPPLY CIRCUIT






1.Turn ignition switch OFF.
2.Check resistance between yaw rate/side/decel G sensor connector B3 terminal 1 and ground.





Is the inspection result normal?
YES- GO TO 5
NO- Repair or replace malfunctioning components.

5. CHECK YAW RATE/SIDE/DECEL G SENSOR HARNESS






1.Check continuity between ABS actuator and electric unit (control unit) connector E33 (A) terminals 14 and 25 and yaw rate/side/
decel G sensor connector B3 (B) terminals 2 and 3.





2.Check continuity between ABS actuator and electric unit (control unit) connector E33 (A) terminals 14, 25 and ground.





Is the inspection result normal?
YES- GO TO 6
NO- Repair or replace malfunctioning components.

6. CHECK DATA MONITOR

1.Connect Yaw rate/side/decel G sensor and ABS actuator and electric unit (control unit) connectors.
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- Replace ABS actuator and electric unit (control unit). Service and Repair.
NO- Replace Yaw rate/side/decel G sensor. Service and Repair.