ENGINE TUNE-UP[L3 Turbo]

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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.

Engine Tune-up Preparation

1.  Verify that the shift lever is in neutral position

2.  Connect the M-MDS to the DLC-2.

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3.  Verify that no DTCs are available.

4.  Warm up the engine (ECT is approx. 80°C {176 °F} or more).

5.  Turn off the electrical loads.

6.  Wait until the cooling fans stop.

Ignition Timing Inspection

Note

•  The ignition timing cannot be adjusted.

•  The M-MDS is required to verify the ignition timing.

1.  Verify the ignition timing (M-MDS: SPARKADV) using the PID/data monitor function of the M-MDS.

2.  Verify that ignition timing advances when the engine speed increases gradually.

•  If there is malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See ENGINE SYMPTOM TROUBLESHOOTING[L3 Turbo].)

Idle Speed Inspection

Note

•  Idle speed is not adjustable.

•  Idle speed verification requires M-MDS.

1.  Verify that the idle speed (M-MDS: RPM PID) is within the specification using M-MDS.

•  If there is malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See ENGINE SYMPTOM TROUBLESHOOTING[L3 Turbo].)

Idle Mixture Inspection

1.  Verify that the idle speed and ignition timing are within the specification. (SeeIdle Speed Inspection.) (SeeIgnition Timing Inspection.)

2.  Insert an exhaust gas analyzer to the tailpipe.

3.  Verify that the CO and HC concentrations are within the regulation.