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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0132-87: Lost Communication with Suspension Control Module "A" Missing Message; DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U1110-87: Lost Communication with Intuitive Parking Assist Module Missing Message [10/2023 - ] >> Description
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0132-87: Lost Communication with Suspension Control Module "A" Missing Message; DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U1110-87: Lost Communication with Intuitive Parking Assist Module Missing Message [10/2023 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
U0100-87 Lost Communication with ECM/PCM "A" Missing Message While driving at 20km/h (12.4 mph) or higher, a communication malfunction with the ECM continues for 5 minutes or more
  • ECM
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message After the ignition switch is turned to ON, a communication malfunction with the steering sensor continues for 1.3 seconds or more
  • Steering sensor
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U0129-87 Lost Communication With Brake System Control Module Missing Message After the ignition switch is turned to ON, a communication malfunction with the skid control ECU (brake actuator assembly) continues for 10 seconds or more
  • Skid control ECU (brake actuator assembly)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Comes on
U0132-87 Lost Communication with Suspension Control Module "A" Missing Message Lost communication with AVS ECU (absorber control ECU)
  • AVS ECU (Absorber control ECU)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U0134-87 Lost Communication with Power Steering Control Module Rear Missing Message Lost communication with rear steering link assembly (DRS ECU)
  • Rear steering link assembly (DRS ECU)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U0140-87 Lost Communication with Body Control Module Missing Message After the ignition switch is turned to ON, a communication malfunction with the main body ECU (multiplex network body ECU) continues for 10 seconds or more
  • Main body ECU (multiplex network body ECU)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U023A-87 Lost Communication with Image Processing Module "A" Missing Message After the ignition switch is turned to ON, a communication malfunction with the driving support ECU assembly continues for 10 seconds or more
  • Driving support ECU assembly
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U1104-87 Lost Communication with Driving Support ECU Missing Message After the ignition switch is turned to ON, a communication malfunction with the driving support ECU assembly continues for 10 seconds or more
  • Driving support ECU assembly
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
U1110-87 Lost Communication with Intuitive Parking Assist Module Missing Message After the ignition switch is turned to ON, a communication malfunction with the clearance warning ECU assembly continues for 10 seconds or more
  • Clearance warning ECU assembly
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on
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