Toyota Corolla Cross: Multi-axis Acceleration Sensor Module "A" Missing Calibration (C051D54,C121054)
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 |
|---|---|---|---|
|
C051D54 |
Multi-axis Acceleration Sensor Module "A" Missing Calibration |
Zero point calibration of acceleration sensor undone. |
|
|
C121054 |
Yaw Rate Sensor Missing Calibration |
Zero point calibration of yaw rate sensor undone. |
|
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*1 or U012587*2 and U015187 are output. When DTCs U012500*1 or U012587*2 and U015187 are output together with C051D54 and/or C121054, inspect and repair the trouble areas indicated by U012500*1 or U012587*2 and U015187 first.
*1: for 2WD
*2: for AWD
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 |
(b) Perform yaw rate and acceleration sensor zero point calibration.
Chassis > Brake/EPB > Utility|
Tester Display |
|---|
|
Calibration |
|
.gif)
|
2. |
CLEAR DTC |
(a) Clear the DTCs.
Chassis > Brake/EPB > Clear DTCs(b) Turn the ignition switch off.
|
|
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|
Result |
Proceed to |
|---|---|
|
C051D54 and C121054 are not output |
A |
|
C051D54 or C121054 is output |
B |
| A | .gif)
|
END |
|
|
4. |
CHECK AIRBAG ECU ASSEMBLY INSTALLATION |
(a) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.
Click here .gif)
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 |
|
|
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 |
- |
|
Tester Display |
|---|
|
Lateral G |
|
Forward and Rearward G |
|
Yaw Rate Sensor Value |
(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.
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
REPLACE AIRBAG ECU ASSEMBLY |
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