Toyota Yaris: Vehicle Stability Control System / Zero Point Calibration of Yaw Rate Sensor Undone (X204C)
DESCRIPTION
| Code | Tester Display | Measurement Item | Trouble Area | RoB Output from |
|---|---|---|---|---|
| X204C | Zero Point Calibration of Yaw Rate Sensor Undone | History of incomplete yaw rate sensor zero point calibration |
| Brake |
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
Click here
-
If the yaw rate and acceleration sensor (airbag sensor assembly) was replaced or reinstalled, perform "Calibration".
Click here
PROCEDURE
| 1. | CHECK FOR DTCs (HEALTH CHECK) |
(a) Using the GTS, perform the Health Check.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B |
 | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
| 2. | PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor.
Chassis > Brake > Utility| Tester Display |
|---|
| Reset Memory |
| Tester Display |
|---|
| Calibration |
|
| 3. | CLEAR VEHICLE CONTROL HISTORY (RoB) |
(a) Using the GTS, clear the Vehicle Control History (RoB).
Chassis > Brake > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
|
| 4. | CHECK VEHICLE CONTROL HISTORY (RoB) |
(a) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(b) Using the GTS, check for Vehicle Control History (RoB).
Chassis > Brake > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
| Result | Proceed to |
|---|---|
| X204C is not output | A |
| X204C is output | B |
| A |
 | END |
|
| 5. | CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.
OK:
The sensor should be tightened to the specified torque.
The sensor is not installed in a tilted position.
| NG |
 | INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY |
|
| 6. | READ VALUE USING GTS |
(a) Select the Data List using the GTS.
Chassis > Brake > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Lateral G | Lateral G | Min.: -25.105 m/s2, Max.: 24.908 m/s2 | Turning right: -25.105 to 0.000 m/s2 Turning left: 0.000 to 24.908 m/s2 | During turning: Changes in proportion with lateral acceleration |
| Forward and Rearward G | Forward and rearward G | Min.: -25.105 m/s2, Max.: 24.908 m/s2 | During deceleration: -25.105 to 0.000 m/s2 During acceleration: 0.000 to 24.908 m/s2 | During acceleration/deceleration: Changes in proportion with acceleration |
| Yaw Rate Sensor Value | Yaw rate sensor | Min.: -128°/s, Max.: 127°/s | Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s | - |
| Tester Display |
|---|
| Lateral G |
| Forward and Rearward G |
| Yaw Rate Sensor Value |
OK:
The yaw rate and acceleration sensor (airbag sensor assembly) output value is normal.
| OK |
 | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
 | REPLACE AIRBAG SENSOR ASSEMBLY |
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Liftgate/Trunk Lid
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
