Checking the engine crankshaft speed at idle speed (Mitsubishi Space Star)

1. Prepare the vehicle for testing (warm up the engine to operating temperature).

2. Turn off the ignition and connect the MUT-II device to the diagnostic connector.

3. Check the basic setting of the ignition timing angle, which should correspond to the nominal value.

Setting the ignition timing angle: 5° ±3° before TDC

4. Start the engine and let it idle for 2 minutes.

5. On the MUT-II device, select item 22 and check the crankshaft speed at idle, which should correspond to the nominal value.

Engine crankshaft speed at idle: 600±100 min⁻¹*

Note

(1) The engine idle speed of a vehicle with a manual transmission changes according to the temperature of the transmission oil.

(2) After 4 minutes of engine idling, the engine crankshaft speed should be about 750 min⁻¹ (Fig. 2.7)

(3) The engine idle speed is automatically controlled by the idle speed control system.