Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Zero Point Calibration of Yaw Rate Sensor Undone (X204C)

DESCRIPTION

The airbag ECU assembly has a built-in yaw rate and acceleration sensor.

Code

Tester Display

Measurement Item

Trouble Area

Output ECU

X204C

Zero Point Calibration of Yaw Rate Sensor Undone

History of incomplete yaw rate sensor zero point calibration

  • Sensor installation
  • Yaw rate sensor (airbag ECU assembly)

Skid control ECU (brake actuator assembly)

PROCEDURE

1.

CHECK DTC (HEALTH CHECK)

(a) Perform the Health Check using the GTS.

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

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

Chassis > Brake/EPB > Utility

Tester Display

Reset Memory

NEXT

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

Chassis > Brake/EPB > Utility

Tester Display

Calibration

NEXT

4.

CLEAR VEHICLE CONTROL HISTORY (RoB)

(a) Using the GTS, clear the Vehicle Control History (RoB).

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

NEXT

5.

CHECK VEHICLE CONTROL HISTORY (RoB)

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Using the GTS, check for Vehicle Control History (RoB).

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

Result

Proceed to

X204C is not output

A

X204C is output

B

A

END

B

6.

CHECK AIRBAG ECU ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.

Click here

OK:

The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.

The yaw rate and acceleration sensor (airbag ECU assembly) is not installed in a tilted position.

NG

INSTALL AIRBAG ECU ASSEMBLY CORRECTLY

OK

7.

READ VALUE USING GTS (LATERAL G, FORWARD AND REARWARD G AND YAW RATE SENSOR VALUE)

(a) Check the yaw rate and acceleration sensor output value displayed on the GTS.

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

-

Chassis > Brake/EPB > Data List

Tester Display

Lateral G

Forward and Rearward G

Yaw Rate Sensor Value

OK:

The yaw rate and acceleration sensor (airbag ECU assembly) output value is normal.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPLACE AIRBAG ECU ASSEMBLY

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