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Home >> Lexus >> 2021 >> RX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Dynamic Torque Control AWD System - Diagnostic Codes & Circuit Tests) >> Dynamic Torque Control AWD System >> DTC U0073: Control Module Communication Bus Off [08/2019 - ] >> Description
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DTC U0073: Control Module Communication Bus Off [08/2019 - ]: Description

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The 4WD ECU assembly stores this DTC when a communication malfunction is detected.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0073 Control Module Communication Bus Off
  1. When the following continues for 5 seconds or more:
    • Signals from the 4WD ECU assembly are not received.
  2. When the following occurs 10 times consecutively:
    • A communication malfunction (bus off) occurs one or more times within 0.1 seconds.
  • CAN communication system
  • 4WD ECU assembly
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