Mitsubishi PAJERO IV Service Manual page 66

2-42
NOTE: In higher altitude, the ignition timing is more
advanced than the standard value by approximately
5 ° .
NOTE: Wait till approximately 1 minute passes after
the engine started, and check the ignition timing
when the engine stabilized.
6. Check the idle speed.
Standard value: 700 ± 100 r/min
NOTE: The idle speed is controlled automatically
by the idle speed control system.
NOTE: When using the M.U.T.-III, select item No.
02 and take a reading of the idle speed.
7. If the idle speed is outside the standard value,
inspect the MPI system (Refer to WORKSHOP
MANUAL GROUP 13 − Troubleshooting).
8. Set the CO tester.
9. Check the CO contents at idle.
Standard value: 1.0 ± 0.5%
MD998299
Mixture
adjusting
screw
Air flow sensor
10.If there is deviation from the standard value, set
the idle mixture to the specified value by adjusting
the mixture adjusting screw (variable resister).
Use the special tool MAS screwdriver
(MD998299) to turn the mixture adjusting screw.
11.Remove the timing light.
12.Turn the ignition switch to the "LOCK" (OFF)
position and then remove the M.U.T.-III.
<VEHICLES WITH CATALYTIC
CONVERTER>
1. Before inspection, set the vehicle to the
pre-inspection condition.
PERIODIC INSPECTION AND MAINTENANCE
OPERATIONS AFTER ENGINE IS WARMED UP
2. Turn the ignition switch to the "LOCK" (OFF)
AK603844 AB
3. Set a timing light to the power supply line
4. Start the engine and let it run at idle.
5. Check that ignition timing is at the standard value.
NOTE: The ignition timing may fluctuate within
This is normal.
NOTE: In higher altitude, the ignition timing is more
advanced than the standard value by approximately
5
NOTE: Wait till approximately 1 minute passes after
the engine started, and check the ignition timing
when the engine stabilized.
6. Check the idle speed.
MB991824
MB991827
position and then connect the M.U.T.-III to the
diagnosis connector.
No. 1 Ignition coil
(terminal No. 3) of the ignition coil No. 1.
Standard value: approximately 10° BTDC
.
°
Standard value: 700 ± 100 r/min
NOTE: The idle speed is controlled automatically
by the idle speed control system.
Diagnosis
connector
MB991910
AC608423 AC
AK602718
AC
± 7 ° .