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Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC U0073: Control Module Communication Bus Off; 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 [08/2017 - ] >> Description
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DTC U0073: Control Module Communication Bus Off; 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 [08/2017 - ]: Description

The power steering ECU receives signals from the ECM, steering angle sensor and skid control ECU via the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
U0073 Control module communication bus off.
  • ECM
  • CAN communication system
  • Power steering ECU assembly
U0100 The engine speed signal is lost.
  • ECM
  • CAN communication system
  • Power steering ECU assembly
U0126 The steering angle signal is lost.
  • Steering angle sensor
  • CAN communication system
  • Power steering ECU assembly
U0129 The vehicle speed signal is lost.
  • Skid control ECU
  • CAN communication system
  • Power steering ECU assembly
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