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

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS  ELECTRONICALLY CONTROLLED BRAKE SYSTEM(for HEV Model)  C051D54  Multi-axis Acceleration Sensor Module "A" Missing Calibration  C121054  Yaw Rate Sensor Missing Calibration  


DESCRIPTION

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag ECU assembly) via CAN communication.

The DTC is also stored when the calibration has not been completed.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Note
C051D54 Multi-axis Acceleration Sensor Module "A" Missing Calibration Zero point calibration of acceleration sensor undone.
·

Acceleration sensor (airbag ECU assembly) installation

·

Acceleration sensor (airbag ECU assembly)

·

Skid control ECU (brake actuator assembly)


Does not come on Brake/EPB Output ECU: Skid control ECU (brake actuator assembly)
C121054 Yaw Rate Sensor Missing Calibration Zero point calibration of yaw rate sensor undone.
·

Yaw rate sensor (airbag ECU assembly) installation

·

Yaw rate sensor (airbag ECU assembly)

·

Skid control ECU (brake actuator assembly)


Does not come on Brake/EPB Output ECU: Skid control ECU (brake actuator assembly)

CAUTION / NOTICE / HINT

NOTICE:

If there is a malfunction in the bus lines between the yaw rate and acceleration sensor (airbag ECU assembly) and the CAN communication system, DTCs U012500 and U015187 are output. When DTCs U012500 and U015187 are output together with C051D54 and/or C121054, inspect and repair the trouble areas indicated by U012500 and U015187 first.


PROCEDURE

1.PERFORM YAW RATE AND ACCELERATION SENSOR ZERO POINT CALIBRATION
a.

Clear the zero point calibration data.

Chassis > Brake/EPB > Utility
Tester Display
Reset Memory
50005 435 4560

b.

Perform yaw rate and acceleration sensor zero point calibration.

Chassis > Brake/EPB > Utility
Tester Display
Calibration
50005 435 4554

Result:
Proceed to
NEXT



NEXT

2.CLEAR DTC
2.CLEAR DTC
a.

Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs
50002 435

b.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

3.RECONFIRM DTC
3.RECONFIRM DTC
a.

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


b.

Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes
50001 435

Result:
Result Proceed to
C051D54 and C121054 are not output A
C051D54 or C121054 is output B



A

END

B

4.CHECK AIRBAG ECU ASSEMBLY INSTALLATION
4.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

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

NG

INSTALL AIRBAG ECU ASSEMBLY CORRECTLY

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


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

Check the Data List using 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
50003 435 25,26,29

b.

Check the yaw rate and acceleration sensor (airbag ECU assembly) output value displayed on the GTS.

OK:

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



Result:
Proceed to
OK
NG



OK

REPLACE BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR (for HEV Model)>REMOVAL


NG

REPLACE AIRBAG ECU ASSEMBLY

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