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 |
Steering Angle Sensor Wrong Installation (X0455)
DESCRIPTION Code Tester Display Measurement Item Trouble Area RoB Output from X0455 Steering Angle Sensor Wrong Installation History of steering angle sensor being installed incorrectly
Correct spiral cable with sensor sub-assembly
Steering angle sensor
Brake CAUTION / NOTICE / HINT NOTICE: After performing the inspection, check and clear the vehicle control history (RoB)...
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DESCRIPTION Code Tester Display Measurement Item Trouble Area RoB Output from X20D7 Zero Point Calibration of Steering Angle Sensor Malfunction History of the steering angle sensor zero point calibration position differing from the stored value
Poor adjustment of the center position of the steering wheel
Poor adjustment of wheel alignment
Brake CAUTION / NOTICE / HINT NOTICE: After performing the inspection, check and clear the vehicle control history (RoB)...
Other information:
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DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode B00011A Driver Frontal Stage 1 Deployment Control Circuit Resistance Below Threshold The airbag sensor assembly detects a line short in the driver seat airbag squib circuit for 2 seconds during the primary check Spiral cable sub-assembly malfunction Horn button assembly malfunction Airbag sensor assembly malfunction Harness or connector Spiral cable sub-assembly Horn button assembly Airbag sensor assembly Comes on Applies to check mode WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal...
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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
