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 |
|
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 | .gif)
|
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
.gif)
|
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 .gif)
|
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 (RoB) |
(a) Using the GTS, clear the Vehicle Control History (RoB).
Chassis > Brake/EPB > Utility|
Tester Display |
|---|
|
Vehicle Control History (RoB) |
|
|
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 |
|
|
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 |
|
|
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 |
- |
|
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 |
READ NEXT:
Zero Point Calibration of Steering Angle Sensor Initialization Malfunction (X208A)
DESCRIPTION
Code
Tester Display
Measurement Item
Trouble Area
X208A
Zero Point Calibration of Steering Angle Sensor Initializat
TRAC does not Operate
DESCRIPTION
When TRAC or VSC is operating, the skid control ECU (brake actuator
assembly) blinks the slip indicator light to inform the driver that slippage occurred.
When in VSC off mode, or TRAC
Excessive Brake Pedal Travel (No Fluid Leaks and No Air in System)
PROCEDURE
1.
PRE-INSPECTION
(a) Brake pedal inspection
(1) Perform a visual inspection and operate the brake pedal to
check for any malfunctions.
(2) Check the br
SEE MORE:
Transmission Control ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Transmission Control ECU Communication Stop Mode
Communication stop for "TCM" is indicated on the "Communication Bus Check"
screen of the GTS.
TC
Inspection
INSPECTION
PROCEDURE
1. INSPECT TRANSMISSION REVOLUTION SENSOR (NT)
(a) Connect the battery to the transmission revolution sensor (NT) as shown in
the illustration.
*1
Battery
*2
Ammeter
*a
Component without harness conn
