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Home >> Honda >> 2020 >> Fit EX >> Repair and Diagnosis (Single Page) >> Steering >> Electronic Steering >> Electronic Power Steering (EPS) System - DTC Diagnostics & DTC Advanced Diagnostics >> DTC Advanced Diagnostics >> DTC U0122-00: F-CAN Malfunction (EPS Control Unit-VSA Modulator-Control Unit)
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DTC U0122-00: F-CAN Malfunction (EPS Control Unit-VSA Modulator-Control Unit)

Confirmation Procedure Basic Condition:
  • 12 volt battery voltage above 10 V
  • IG voltage continued more than 10 V more than 5 seconds

Operating Condition:

  • 1.

    Start the engine.

  • 2.

    Wait more than 60 seconds after the EPS indicator goes off.

Execution Initial Diagnosis/Regular Diagnosis
Duration About 60 seconds
DTC Type
  • 1 drive cycle
  • EPS indicator on
Fail Safe Action
  • Continue EPS function/assist (Alternative assist or limited assist) (Continue system diagnosis: EPS function/assist will return to normal when the system returns to normal or if normalcy can receive signal via the F-CAN lines)
Possible Cause
  • Open or Poor connection between the EPS control unit and the VSA modulator-control unit (F-CAN_H, F-CAN_L lines)
  • VSA modulator-control unit program not the latest
  • VSA modulator-control unit internal failure
  • Motor/EPS control unit internal failure