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1.
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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.
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Set the vehicle to the pre-inspection condition.
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2.Turn the ignition switch to "LOOK" (OFF) position, and connect the diagnosis connector
to the 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: 177.3 - 195.9 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 solenoid valve
- Malfunction of the variable nozzle
- Malfunction of the boost pressure sensor
- Leakage of supercharging pressure
- Malfunction of the turbocharger
- Inadequate vacuum pressure to the variable geometry 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 solenoid valve
- Malfunction of the variable nozzle
- Malfunction of the manifold absolute pressure sensor
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