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Home >> Subaru >> 2017 >> BRZ Limited, Standard Trans >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control (VSC) System >> Vehicle stability control system >> DTC U0073 Control Module Communication Bus "A" Off; DTC U0100 Engine data, not received; DTC U0101 Transmission data, not received; DTC U0126 Lost Communication With Steering Angle Sensor Module; DTC U0140 Missing data for body integrated unit >> Description of functions
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Description of functions

The skid control computer (brake actuator ASSY) inputs signals of the engine control computer, the transmission control computer, and the steering sensor through CAN communication.

Diagnostic codes DTC detecting conditions Faulty part
U0073 The voltage at +BS terminal is between 9.6 to 16.5 V and bus off status continues for 0.1 seconds or more. CAN communication system
U0100 The vehicle is running and the voltage at +BS terminal is between 9.6 to 16.5 V, and the data transmission or reception to the engine control computer is impossible for 0.5 seconds or more.
  • CAN communication line
  • Skid control computer (brake actuator ASSY)
  • Engine control computer
U0101 The vehicle is running and the voltage at +BS terminal is between 9.6 to 16.5 V, and the data transmission or reception to the transmission control computer is impossible for 0.5 seconds or more.
  • CAN communication line
  • Skid control computer (brake actuator ASSY)
  • Transmission control computer
U0126 The vehicle is running and the voltage at +BS terminal is between 9.6 to 16.5 V, and the data reception from the steering sensor is impossible for 0.1 seconds or more.
  • CAN communication line
  • Skid control computer (brake actuator ASSY)
  • Steering sensor
U0140 The vehicle is running and the voltage at +BS terminal is between 9.6 to 16.5 V, and the data transmission or reception to the main body ECM is impossible for 0.5 seconds or more.
  • CAN communication line
  • Skid control computer (brake actuator ASSY)
  • Main body ECM
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