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Home >> Lexus >> 2023 >> NX 350 Base >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (3 Of 3), Symptom Tests & Circuit Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [11/2021 - ] >> Description
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DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [11/2021 - ]: Description

The skid control ECU (brake actuator assembly) communicates with the following ECUs and sensors via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U0100-87 Lost Communication With ECM/PCM "A" Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the ECM for 2 seconds or more.
  • CAN communication system
  • ECM
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0101-87 Lost Communication with TCM Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the TCM (ECM) for 2 seconds or more.
  • CAN communication system
  • TCM (ECM)
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0103-87 Lost Communication with Gear Shift Control Module "A" Missing Message When the voltage at terminal +BS is 9.6 V or more, data cannot be received from the shift control ECU (transmission floor shift assembly) for 5 seconds or more.
  • CAN communication system
  • Shift control ECU (transmission floor shift assembly)
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0125-87 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the yaw rate and acceleration sensor (airbag sensor assembly) cannot be received for 1 second or more.
  • CAN communication system
  • Yaw rate and acceleration sensor (airbag sensor assembly)
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the steering angle sensor cannot be received for 1 second or more.
  • CAN communication system
  • Steering angle sensor
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0131-87 Lost Communication With Power Steering Control Module Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, data cannot be received from the power steering ECU (rack and pinion power steering gear assembly) for 1 seconds or more.
  • CAN communication system
  • Power steering ECU (rack and pinion power steering gear assembly)
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0140-87 Lost Communication with Body Control Module Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, data cannot be received from the main body ECU (multiplex network body ECU) for 2 seconds or more.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
U0151-87 Lost Communication with Restraints Control Module Missing Message The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the airbag sensor assembly cannot be received for 5 seconds or more.
  • CAN communication system
  • Airbag sensor assembly
  • Skid control ECU (brake actuator assembly)
 Brake/EPB B
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