2004 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Circuit Description

The Active Control Engine Mount (ACM) system decreases engine vibration at low engine speed using ACM VSV. The VSV is controlled by a pulse signal transmitted to the VSV from the ECM. The frequency this pulse signal is matched to the engine speed to decrease engine vibration.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

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

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

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