RM38T0EC _54 Brake _112606 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS _0608077 ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model) J

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model)  Yaw Rate Sensor Wrong Installation (X0456)  


DESCRIPTION

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

Code Tester Display Measurement Item Trouble Area Output ECU
X0456 Yaw Rate Sensor Wrong Installation History of yaw rate sensor (airbag ECU assembly) being installed incorrectly
·

Yaw rate sensor (airbag ECU assembly) installed improperly

·

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:
Result Proceed to
DTCs are not output A
DTCs are output B



A

2.READ VALUE USING GTS (YAW RATE SENSOR VALUE)

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

2.READ VALUE USING GTS (YAW RATE SENSOR VALUE)
a.

Check Data List item "Yaw Rate Sensor Value".

Chassis > Brake/EPB > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
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
Yaw Rate Sensor Value
50003 435 29

Result:
Result Proceed to
NG (The yaw rate sensor (airbag ECU assembly) output value is 0°/s when the vehicle is stationary, but the value fluctuates when turning.) A
NG (The yaw rate sensor (airbag ECU assembly) output value is not 0°/s when the vehicle is stationary.) B
OK C



A

3.CHECK AIRBAG ECU ASSEMBLY INSTALLATION

B

REPLACE AIRBAG SENSOR ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL


C

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


3.CHECK AIRBAG ECU ASSEMBLY INSTALLATION
a.

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

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>INSTALLATION

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.



Result:
Proceed to
OK
NG



OK

4.CLEAR VEHICLE CONTROL HISTORY (RoB)

NG

INSTALL AIRBAG ECU ASSEMBLY CORRECTLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>INSTALLATION


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)
50005 435 55

Result:
Proceed to
NEXT



NEXT

5.PERFORM ZERO POINT CALIBRATION OF STEERING SENSOR
5.PERFORM ZERO POINT CALIBRATION OF STEERING SENSOR
a.

Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.


Result:
Proceed to
NEXT



NEXT

END