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Home >> Honda >> 2015 >> Fit EX, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> VSA System - DTC Diagnostics & DTC Advanced Diagnostics >> DTC Advanced Diagnostics >> VSA Related Advanced Diagnostics DTCs (VSA Control Unit) >> DTC U0029-00: CAN Communication Failure (Bus OFF)
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DTC U0029-00: CAN Communication Failure (Bus OFF)

Confirmation Procedure Basic Condition:
  • 12 volt battery voltage 9.6 - 16.5 V

Operating Condition:

  • 1.

    Start the engine, then wait 2 seconds or more.

Execution Initial Diagnosis/Regular Diagnosis
Duration About 2 seconds
DTC Type
  • 1 drive cycle
  • VSA indicator on
Fail Safe Action
  • Stop CAN function (Dependent upon the conditions)
  • Degrade ABS performance
  • Stop engine drag torque control function
  • Stop TCS function or fade out (Dependent upon the conditions)
  • Stop VSA function
  • Stop brake assist function
  • Stop hill start assist function
Possible Cause
  • Open between the VSA modulator-control unit and the PCM (F-CAN_L, F-CAN_H lines)
  • Internal failure of another unit on F-CAN
  • VSA modulator-control unit program not the latest
  • VSA modulator-control unit internal failure