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HOMESERVICE MANUALSHONDA2020CIVIC SI, 4D SEDANREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESVSA SYSTEM - ADVANCED DIAGNOSTICSDTC ADVANCED DIAGNOSTICSVSA RELATED DTCS (VSA CONTROL UNIT)DTC U0155-00: CAN COMMUNICATION FAILURE WITH METER
2020 Honda Civic Si, 4D Sedan

DTC U0155-00: CAN Communication Failure with Meter

2020 Honda Civic Si, 4D SedanSECTION DTC U0155-00: CAN Communication Failure with Meter
Confirmation Procedure Basic Condition:
  • 12 volt battery voltage 10 V or more

Operating Condition:

  • Start the engine.
  • Test drive the vehicle at 7 mph (10 km/h) or more for at least 2 seconds.

    (Drive the vehicle on the road, not on a lift. Be careful of surrounding traffic conditions.)
Execution Regular Diagnosis
Duration About 2 seconds
DTC Type
  • 1 drive cycle
  • VSA indicator on
Fail Safe Action
  • Stop TCS function
  • Stop VSA function
  • Stop engine drag torque control function
  • Stop hill start assist function
  • Stop agile handling assist function
  • Stop automatic brake hold function
  • Stop driving support system's brake function
Possible Cause
  • Open or Poor connection between the VSA modulator-control unit and the gauge control module (F-CAN_L, F-CAN_H lines)* 1
  • Open or Poor connection between the VSA modulator-control unit and the CAN gateway (F-CAN A_L, F-CAN A_H, F-CAN B_L, F-CAN B_H lines)* 2
  • Open or Poor connection between the CAN gateway and the gauge control module (F-CAN A_L, F-CAN A_H) *2*3/*2*5
  • Open or Poor connection between the CAN gateway and the gauge control module (F-CAN C_L, F-CAN C_H) *2*4/*2*6
  • Gauge control module internal failure
  • VSA modulator-control unit internal failure

*1: Without ACC

*2: With ACC

*3: '16-18 2/4-door

*4: '19-21 2/4-door

*5: '17-19 5-door

*6: '20-21 5-door

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.