TURBOCHARGER SUPERCHARGING PRESSURE CHECK


<4D5-Except high power engine>
1.
caution Conduct the driving test in a location where driving at full acceleration can be done with safety. Two person should be in the vehicle when the test is conducted; the person in the passenger seat should read the indications shown by the M.U.T.-III.
Set the vehicle to the pre-inspection condition.
2.Turn the ignition switch to the "LOCK" (OFF) position and then connect the M.U.T.-III to the diagnosis connector (Refer to GROUP 00 - Precautions Before Service, M.U.T.-III ).
3.Use the data list function named "Item No. 6" boost pressure sensor of the M.U.T.-III to check the supercharging pressure when the engine speed increases to approximately 3,000 r/min or more by driving at full acceleration in 2nd.
Standard value:

    <Vehicles without intercooler> 194 - 234 kPa
    <Vehicles with intercooler> 181 - 221 kPa
4.If the supercharging pressure deviates from the standard value, check the following items for possible cause.

  • Malfunction of the waste gate actuator
  • Malfunction of the manifold absolute pressure sensor
  • Leakage of supercharging pressure
  • Malfunction of the turbocharger
5.When the indicated supercharging is more than standard value, supercharging control may be faulty, therefore check the followings.

  • Disconnection or cracks of the waste gate actuator rubber hose
  • Malfunction of the waste gate actuator
  • Malfunction of the waste gate valve
  • Malfunction of the manifold absolute pressure sensor

<4D5- High power engine, 4N1>
1.
caution Conduct the driving test in a location where driving at full acceleration can be done with safety. Two person should be in the vehicle when the test is conducted; the person in the passenger seat should read the indications shown by the M.U.T.-III.
Set the vehicle to the pre-inspection condition.
2.Turn the ignition switch to the "LOCK" (OFF) position and then connect the M.U.T.-III to the diagnosis connector (Refer to GROUP 00 - Precautions Before Service, M.U.T.-III ).
3.Use the data list function named "Item No. 6" boost pressure sensor of the M.U.T.-III to check the supercharging pressure when the engine speed increases to approximately 3,000 r/min or more by driving at full acceleration in 2nd.
Standard value:

    <4D5- High power engine> 210 - 250 kPa
    <4N1> 240 - 280 kPa
4.If the supercharging pressure deviates from the standard value, check the following items for possible cause.

  • Malfunction of the variable geometry actuator
  • Malfunction of the variable geometry control solenoid valve
  • Malfunction of the variable nozzle
  • Malfunction of the manifold absolute pressure sensor
  • Leakage of supercharging pressure
  • Malfunction of the turbocharger
  • Inadequate vacuum pressure to the variable geometry control solenoid valve
5.When the indicated supercharging is more than standard value, supercharging control may be faulty, therefore check the followings.

  • Malfunction of the variable geometry actuator
  • Malfunction of the variable geometry control solenoid valve
  • Malfunction of the variable nozzle
  • Malfunction of the manifold absolute pressure sensor