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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ Automatic Headlight Beam Level Control System) (Diagnostic Codes) (1 Of 2) >> LIGHTING SYSTEM (w/ Automatic Headlight Beam Level Control System) >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System [10/2015 - 08/2019] >> Description
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DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System [10/2015 - 08/2019]: Description

These DTCs are stored when the CAN communication system is malfunctioning.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0073 Control Module Communication Bus OFF Lost communication with CAN communication line CAN communication system -
U0100 Lost Communication with ECM / PCM "A" Lost communication with ECM assembly
  • CAN communication system
  • ECM assembly
 -
U0101 Lost Communication with TCM Lost communication with TCM
  • CAN communication system
  • Hybrid vehicle control ECU assembly
 -
U0126 Lost Communication with Steering Angle Sensor Module Lost communication with steering sensor
  • CAN communication system
  • Steering sensor
 -
U0129 Lost Communication with Brake System Control Module Lost communication with skid control ECU assembly
  • CAN communication system
  • Skid control ECU assembly
 -
U0142 Lost Communication with Body Control Module "B" Lost communication with main body ECU (multiplex network body ECU)
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
 -
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module Lost communication with combination meter assembly
  • CAN communication system
  • Combination meter assembly
 -
U0293 Lost Communication with Hybrid Vehicle Control System Lost communication with hybrid vehicle control ECU assembly
  • CAN communication system
  • Hybrid vehicle control ECU assembly
 -
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