DTC C1240-00: Yaw Rate Sensor / Multi-axis Acceleration Sensor Module "A" [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK PART NUMBER (AIRBAG SENSOR ASSEMBLY)
- Check that the part number of the installed yaw rate and acceleration sensor (airbag sensor assembly) is correct.
OK
Yaw rate and acceleration sensor (airbag sensor assembly) installed in the vehicle has the correct part number.
Result
Proceed to OK NG
Result:
NG
REPLACE AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL [11/2021 - 03/2024] , or refer to REMOVAL [03/2024 - ]
Result:
OK
See step 2
- Check that the part number of the installed yaw rate and acceleration sensor (airbag sensor assembly) is correct.
- CLEAR DTC
Result:
NEXT
See step 3
- RECONFIRM DTC
- Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
- Check if the same DTC is output.
Chassis > Brake/EPB > Trouble Codes
Result
Result Proceed to DTC C1240-00 is not output. A DTC C1240-00 is output. B
Result:
A
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
Result:
B
REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to REMOVAL [11/2021 - ]