2. Check the main ignition timing angle, which should correspond to the nominal value.
Main ignition timing angle: 5°±2° before TDC
3. Turn off the ignition and connect the MUT-II device to the diagnostic connector.
4. Start the engine and increase the engine speed to 2500 rpm for 2 minutes¹.
5. Install the gas analyzer probe (CO and CH) into the exhaust pipe.
6. With the engine idling, measure the concentrations of CO and OH, which should correspond to the nominal values:
- cO concentration - no more than 0.5%;
- cH concentration - no more than 100 ppm.
7. If the concentration of CO and CH is not within the acceptable limits, check the following:
The material is based on data from the website: www.mitsubishiman.ru
- diagnostic codes;
- closed-loop control (in case of normal operation of the control system in closed-loop mode, the output signal of the oxygen concentration sensor changes from 0 to 400 mV and from 600 to 1000 mV at idle);
- fuel pressure;
- fuel injectors;
- ignition coil, high-voltage wires and spark plugs;
- eGR system and valve;
- no leaks in the exhaust gas recirculation (EGR) system and EGR valve;
- compression in the engine cylinders.
Note: If the CO and HC concentration exceeds the nominal values even with all positive tests, replace the three-way catalytic converter.