DESCRIPTION
Code | Tester Display | Measurement Item | Trouble Area |
---|---|---|---|
X204C | Zero Point Calibration of Yaw Rate Sensor Undone | History of incomplete yaw rate sensor zero point calibration |
|
PROCEDURE
1. | CHECK DTC (HEALTH CHECK) |
(a) Perform the Health Check using the Techstream.
Result | Proceed to |
---|---|
DTCs are not output. | A |
DTCs are output. | B |
B | ![]() | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
2. | CLEAR ZERO POINT VALUE FOR YAW RATE AND ACCELERATION SENSOR |
(a) Clear the zero point value for the yaw rate and acceleration sensor.
Click here
Tester Display |
---|
Reset Memory |
|
3. | PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor.
Click here
Tester Display |
---|
Calibration |
|
4. | CLEAR VEHICLE CONTROL HISTORY |
(a) Using the Techstream, clear the Vehicle Control History.
Chassis > Brake/EPB > Utility Tester Display |
---|
Vehicle Control History (RoB) |
|
5. | CHECK VEHICLE CONTROL HISTORY |
(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
(b) Using the Techstream, check for Vehicle Control History.
Chassis > Brake/EPB > Utility Tester Display |
---|
Vehicle Control History (RoB) |
Result | Proceed to |
---|---|
X204C is not output. | A |
X204C is output. | B |
A | ![]() | END |
|
6. | CHECK VEHICLE SPECIFICATION |
(a) Check the combination meter assembly.
Click here
Result | Proceed to |
---|---|
for Optitron Meter Type | A |
for TFT Meter Type | B |
B | ![]() | GO TO STEP 9 |
|
7. | CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the engine switch off.
(b) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.
Click here
OK:
The yaw rate and acceleration sensor (airbag sensor assembly) is tightened to the specified torque.
The yaw rate and acceleration sensor (airbag sensor assembly) is not installed in a tilted position.
NG | ![]() | INSTALL AIRBAG SENSOR ASSEMBLY |
|
8. | READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR) |
(a) Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.
Chassis > Brake/EPB > 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 |
9. | CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION |
(a) Turn the engine switch off.
(b) Check that the yaw rate and acceleration sensor has been installed properly.
Click here
OK:
The yaw rate and acceleration sensor is tightened to the specified torque.
The yaw rate and acceleration sensor is not installed in a tilted position.
NG | ![]() | INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY |
|
10. | READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR) |
(a) Check the yaw rate and acceleration sensor output value displayed on the Techstream.
Chassis > Brake/EPB > 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 output value is normal.
OK | ![]() | REPLACE BRAKE ACTUATOR ASSEMBLY |
NG | ![]() | REPLACE YAW RATE AND ACCELERATION SENSOR |
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