DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module [08/2016 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2024 Lexus RC F, 2023 Lexus RC F, 2022 Lexus RC F, 2021 Lexus RC F, and 2020 Lexus RC F. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2016 - 01/2023] , or refer to DTC CHECK / CLEAR [01/2023 - ]

Chassis > Air suspension > Clear DTCs
Turn the engine switch off.
Drive the vehicle at a speed of 30 km/h (19 mph) or more for 10 seconds or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [08/2016 - 01/2023] , or refer to DTC CHECK / CLEAR [01/2023 - ]

Chassis > Air suspension > Trouble Codes

Result

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

HINT:

If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor.

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 09/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 01/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ]

Result:

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ]