Posted in MMC L200

P1298 – Variable Geometry Turbocharger Control System Malfunction (high pressure) Vehicles withvariable geometry turbocharger MMC L200 IV

 Posted by  Posted on September 29, 2020

FUNCTION

  • The engine-ECU controls the duty ratio of the variable geometry control solenoid valve so that the actual boost pressure can become the target boost pressure.

    • TROUBLE JUDGMENT

  • Engine is running
  • Actual boost pressure is higher than target boost pressure by more than 6.7 kPa

    • PROBABLE CAUSES

  • Failed variable geometry turbocharger control system
  • Failed engine-ECU

    • DIAGNOSTIC PROCEDURE

    STEP 1. Check the turbocharger supercharging pressure.

    Q. Is the check result normal?

    STEP 2. M.U.T.-III diagnosis code.

  • After clearing the diagnosis code through M.U.T.-III, start the engine and confirm whether the diagnosis code is set.

    • Q. Is the diagnosis code set?

    Author: admin