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Home >> Lexus >> 2022 >> ES 350 Base >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System (Except Hybrid) - Diagnostic Codes & Circuit Tests >> POWER STEERING SYSTEM (for Gasoline Model) >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [06/2018 - ] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [06/2018 - ]: Description

The power steering ECU (rack and pinion power steering gear assembly) receives signals from the ECM, steering sensor, skid control ECU (brake actuator assembly), AVS ECU (absorber control ECU) and forward recognition camera via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
U0100 Lost Communication with ECM / PCM "A" Lost communication with ECM
  • CAN communication system
  • ECM
  • Rack and pinion power steering gear assembly
 EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates. The ECU judges the system has returned to normal -
U0126 Lost Communication With Steering Angle Sensor Module Lost communication with steering angle sensor
  • CAN communication system
  • Steering sensor
  • Rack and pinion power steering gear assembly
 EPS warning light: Comes on The ECU judges the system has returned to normal -
U0129 Lost Communication with Brake System Control Module Lost communication with skid control ECU (Brake actuator assembly)
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Rack and pinion power steering gear assembly
 EPS warning light: Comes on The ECU judges the system has returned to normal -
U0132 Lost Communication with Ride Level Control Module Lost communication with AVS ECU (absorber control ECU)
  • CAN communication system
  • AVS ECU (Absorber control ECU)
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on The ECU judges the system has returned to normal w/ Adaptive Variable Suspension System
U023A Lost Communication with Front Camera Module Lost communication with forward recognition camera
  • CAN communication system
  • Forward recognition camera
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on The ECU judges the system has returned to normal -
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