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Home >> Lexus >> 2021 >> RX 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ Automatic Headlight Beam Level Control System) - Diagnostic Codes >> LIGHTING SYSTEM (w/ Automatic Headlight Beam Level Control System) >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message [08/2019 - ] >> Description
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DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message [08/2019 - ]: Description

These DTCs are stored if a CAN communication malfunction occurs between the forward recognition camera and other ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U0100-87 Lost Communication With ECM/PCM "A" Missing Message The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.
  • CAN communication system
  • ECM
 Forward recognition camera
U0125-87 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message The forward recognition camera does not receive data from the yaw rate sensor assembly*1 or airbag sensor assembly*2 for approximately 5 seconds or more.
  • CAN communication system
  • Yaw rate sensor assembly*1
  • Airbag sensor assembly*2
 Forward recognition camera
U0129-87 Lost Communication with Brake System Control Module Missing Message The forward recognition camera does not receive data from the skid control ECU (brake actuator assembly) for approximately 5 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
 Forward recognition camera
U0140-87 Lost Communication with Body Control Module Missing Message The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
 Forward recognition camera
  1. *1: for TFT Meter Type
  2. *2: for Optitron Meter Type
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