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Home >> Lexus >> 2016 >> LX 570 >> Repair and Diagnosis (Single Page) >> Restraints >> Seat Belts >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U023A: Lost Communication with Front Camera Module; DTC U1002: Lost Communication with Gateway Module; DTC U1104: Lost Communication with Driving Support ECU [09/2015 - ] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U023A: Lost Communication with Front Camera Module; DTC U1002: Lost Communication with Gateway Module; DTC U1104: Lost Communication with Driving Support ECU [09/2015 - ]: Description

DTC Code DTC Detection Item DTC Detection Condition Inspection Area
U0100 ECM communication error. When driving the vehicle at a speed of 5 km/h or more, a communication error between the ECM and the driving support ECU assembly is detected for approximately 5 seconds.
  • CAN communication system
  • Driving support ECU assembly
  • ECM
U0125 Lost Communication with Yaw Rate Sensor Module When the engine switch is on (IG), a communication error between the yaw rate sensor and the driving support ECU assembly is detected for approximately 1 second.
  • CAN communication system
  • Airbag ECU assembly (yaw rate sensor)
  • Driving support ECU assembly
U0126 Lost Communication with Steering Angle Sensor Module When the engine switch is on (IG), a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 4 seconds.
  • CAN communication system
  • Steering sensor
  • Driving support ECU assembly
U0129 Lost Communication with Brake System Control Module When the engine switch is on (IG), a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 3 seconds.
  • CAN communication system
  • Brake booster with master cylinder assembly (skid control ECU)
  • Driving support ECU assembly
U0235 Lost Communication with Cruise Control Front Distance Range Sensor When the engine switch is on (IG), a communication error between the millimeter wave radar sensor assembly and the driving support ECU assembly is detected for approximately 1 second.
  • CAN communication system
  • Millimeter wave radar sensor assembly
  • Driving support ECU assembly
U023A Lost Communication with Front Camera Module When the engine switch is on (IG), a communication error between the forward recognition camera and driving support ECU assembly is detected for approximately 2 seconds.
  • CAN communication system
  • Forward recognition camera
  • Driving support ECU assembly
U1002 Lost Communication with Gateway Module When the engine switch is on (IG), communication between the driving support ECU and any of the following components is abnormal for 2 seconds or more.
  • Forward recognition camera
  • Millimeter wave radar sensor assembly
  • CAN communication system
  • Forward recognition camera
  • Millimeter wave radar sensor assembly
  • Driving support ECU assembly
U1104 Lost Communication with Driving Support ECU
  • When the engine switch is on (IG), a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds.
  • When the engine switch is on (IG), a communication error between the driving support ECU assembly and the forward recognition camera is detected for approximately 0.2 seconds.
  • When the engine switch is on (IG), a communication error between the driving support ECU assembly and the skid control ECU (brake actuator assembly) is detected for approximately 1.5 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Forward recognition camera
  • Millimeter wave radar sensor assembly
  • Driving support ECU assembly
  • Wire harness or connector