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Home >> Lexus >> 2015 >> ES 350 >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control System - Diagnostics Codes & Symptom Tests >> Vehicle Stability Control System >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module [08/2014 - ] >> Description
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DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module [08/2014 - ]: Description

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

DTC No. DTC Detection Condition Trouble Area
U0073 Any of the following is detected:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, after the output of data from the skid control ECU (brake actuator assembly) is completed, the signals cannot be sent for 5 seconds or more.
  2. A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession. (Sent signals cannot be received.)
  3. When the IG1 terminal voltage is between 10 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues for 1 second or more.
  4. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession:
    • A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor occurs more than once within 5 seconds.
 CAN communication system
U0100 The IG1 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 Either of the following is detected:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.
  2. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession:
    • Data from the acceleration sensor cannot be received once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Acceleration sensor (Airbag sensor assembly)
U0126 Either of the following is detected:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, data from the steering angle sensor cannot be received for 1 second or more.
  2. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession:
    • Data from the steering angle sensor cannot be received once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Steering angle sensor
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