Idle Mixture Check
WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
Required Special Tool:
MB991502: Scan Tool (MUT-II)
- Before inspection, set vehicle in the following condition:
- Engine coolant temperature: 80 - 95°C (176 - 203°F)
- Lights and all accessories: OFF
- Transaxle: P range
- Connect scan tool MB991502 to the data link connector.
- Check that the basic ignition timing is within the standard value.
- Standard value: 5° BTDC +/- 2°
- Start the engine and increase the engine speed to 2,500 r/min for 2 minutes.
- Set the CO, HC tester.
- Check the CO contents and the HC contents at idle.
- Standard value:
- CO contents: 0.5 % or less
- HC contents: 100 ppm or less
- If the CO and HC contents do not remain inside the standard value, check the following items:
- Diagnosis output
- Closed-loop control (When the closed-loop control is carried out normally, the output signal of the heated oxygen sensor changes between 0 - 400 mV and 600 - 1,00 mV at idle.)
- Fuel pressures
- Injector
- Ignition coil, spark plug cable, spark plug
- EGR system and EGR valve leak
- Evaporative emission control system
- Compression pressure
CAUTION:
To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
NOTE:
Replace the catalytic converter when the CO and HC contents do not remain inside the standard value, even though the result of the inspection is normal for all items.