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DTC U0123: Communication Error of Yaw Rate Sensor: Description

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

This circuit detects the yaw rate of the vehicle and transmits its signal to the skid control ECU and distance control ECU.

DIAGNOSTIC TROUBLE CODE CHART

DTC No. DTC Detection Condition Trouble Area
U0123 While the dynamic radar cruise control is either preparing for operation or operating, the ECM continuously receives a yaw rate sensor malfunction signal for a certain amount of time
  • Communication circuit
  • Yaw rate sensor
  • Distance control ECU (Cruise control ECU)
  • ECM

HINT:

This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

  1. CHECK CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING .