ENGINE TUNE-UP [SKYACTIV-D 2.2]

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Engine Tune-up Preparation

Note

•  If the accelerator pedal is depressed continuously for a specified time, the engine speed may decrease to the idle speed. This is due to the fuel cut control operation, which prevents overheating, and it does not indicate a malfunction. The engine speed returns to normal control when the accelerator pedal is released.

1.  Connect the M-MDS to the DLC-2.

2.  Shift the selector lever (ATX) to the following position:

•  ATX: Selector lever is in P position or N position.

Note

•  The engine coolant temperature and oil temperature can be verified by M-MDS PID “ECT” and “EOT”.

3.  Run the engine speed at a constant 2,500 to 3,000 rpm and warm up the engine (engine coolant temperature: 80 °C {176 °F} or more, oil temperature: 60 °C {140 °F} or more).

4.  Turn off all electrical loads with the engine idling.

5.  If the cooling fan is operating, wait until is stops.

Idle Speed Inspection

Note

•  The idle speed cannot be adjusted.

•  The M-MDS is required to verify the idle speed.

1.  Prepare for the engine tune-up. (See Engine Tune-up Preparation.)

Note

•  For SKYACTIV-D 2.2, idling is not increased even if the A/C or electrical load operation is performed.

•  Verify the difference between the target engine speed and the actual engine speed for the idle speed.

2.  Verify that the difference between the target idle speed (PID: ARPMDES) and the engine speed (PID: RPM) is within 50 rpm using the M-MDS data monitor function. (See PCM INSPECTION [SKYACTIV-D 2.2].)

•  If there is a malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 2.2].)

Note

•  The target idle speed is determined by the idle air control as follows.