DESCRIPTION The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via CAN communication. The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2). If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0123 (Lost Communication with Yaw Rate Sensor Module) is output. These DTCs are also output when calibration has not been completed.
CAUTION / NOTICE / HINT NOTICE: When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration and store system information. Click here
HINT: When U0073, U0123 and/or U0126 is output together with C1243, inspect and repair the trouble areas indicated by U0073, U0123 and/or U0126 first. Click here
PROCEDURE
(a) Check if the brake actuator assembly had been replaced before the DTC was recorded.
(a) Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly. for Column Shift Type: Click here for Floor Shift Type: Click here
OK: The airbag sensor assembly is tightened to the specified torque. The airbag sensor assembly is not installed in a tilted position.
(a) Perform acceleration sensor zero point calibration. Click here
(a) Clear the DTC. Click here (b) Check if the same DTC is recorded. Click here
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Toyota Tundra Service Manual > How To Troubleshoot Ecu Controlled Systems: General Information
GENERAL INFORMATION A large number of ECU controlled systems are used in the TOYOTA TUNDRA. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU ...
