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Home >> Lexus >> 2021 >> NX 300 Base, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Vehicle Stability Control System- Diagnostic Codes (3 Of 3) & Circuit Tests >> Vehicle Stability Control System >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0128: Lost Communication With EPB Module [10/2014 - 05/2019] >> Description
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DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0128: Lost Communication With EPB Module [10/2014 - 05/2019]: Description

The skid control ECU (brake actuator assembly) receives the signals from the ECM, steering sensor, parking brake ECU assembly, and yaw rate and acceleration sensor (airbag ECU assembly) via the CAN communication system.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0073 Control Module Communication Bus OFF Either of the following is detected:
  1. A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession. (Sent signals cannot be received.)
  2. When the +BS terminal voltage is between 10 and 17.4 V, a delay in receiving data from the yaw rate sensor and steering sensor continues for 1 second or more.
  3. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession within 60 seconds.
    • The condition that a delay in receiving data from the yaw rate sensor and steering sensor occurs more than once within 5 seconds.
 CAN communication system -
U0100 Lost Communication with ECM When the +BS terminal voltage is between 10 and 17.4 V, and the vehicle speed is 15 km/h (9 mph) or more, data cannot be received from the ECM for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • ECM
 -
U0124 Lost Communication with Lateral Acceleration Sensor Module Either of the following is detected:
  1. When the +BS terminal voltage is between 10 and 17.4 V, and the vehicle speed is 7 km/h or more, data from the acceleration sensor cannot be received for 1 second or more.
  2. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession within 60 seconds.
    • The condition that data from the acceleration sensor cannot be received occurs once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Acceleration sensor (yaw rate and acceleration sensor)
 -
U0126 Lost Communication with Steering Angle Sensor Module Either of the following is detected:
  1. When the +BS terminal voltage is between 10 and 17.4 V, data from the steering sensor cannot be received for 1 second or more.
  2. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.
    • The condition that data from the steering sensor cannot be received occurs once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Steering sensor
 -
U0128 Lost Communication With EPB Module When voltage at terminal +BS is 10 to 17.4 V, data cannot be received from parking brake ECU assembly continuously for 1 second or more.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Parking brake ECU assembly
 EPB: Electric Parking Brake System
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