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Home >> Lexus >> 2003 >> SC 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 477 (Dynamic Laser Cruise Control System - Diagnosis) >> DTC U0123: Lost Communication With Yaw Rate Sensor Module >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2004 Lexus LS 430. 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.

DTC DETECTING CONDITION

DTC No. DTC Detecting Condition Trouble Area
U0123 While the dynamic laser cruise control is either preparing for operation or operating, if the ECM continuously receives a yaw rate sensor malfunction signal for a certain amount of time, distance control ECU sends a signal to the ECM to record this trouble code.
  • Communication circuit
  • Yaw rate sensor
  • Cruise control ECU (Distance control ECU)
  • ECM