VTEC System

2011 Honda CR-V EX, 2.4 RE3, MZJASECTION VTEC System
  • The VTEC system changes the cam profile to correspond to engine speed. It maximizes torque at low engine speed and output at high engine speed.
  • The low lift cam is used at low engine speeds, and the high lift cam is used at high engine speeds.
  • The rocker arm oil control solenoid switches the VTEC system on and off; the solenoid is controlled by the PCM.
  • The rocker arm oil pressure switch detects VTEC system oil pressure and sends this information to the PCM.
    ENGINE SPEED CHART

    ENGINE SPEED ROCKER ARM OIL CONTROL SOLENOID ROCKER ARM OIL PRESSURE SWITCH INTAKE VALVE LIFT
    LOW OFF ON LOW
    HIGH ON OFF HIGH
    Fig 1: Identifying VTEC System Components
    G06610247Courtesy of AMERICAN HONDA MOTOR CO., INC.
RENDER: 1.0x

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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.