OPERATIONS AFTER ENGINE IS WARMED UP
PERIODIC INSPECTION AND MAINTENANCE
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%
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.
2. Turn the ignition switch to the "LOCK" (OFF)
position and then connect the M.U.T.-III to the
diagnosis connector.
3. Set a timing light to the power supply line
(terminal No. 3) of the ignition coil No. 1.
4. Start the engine and let it run at idle.
5. Check that ignition timing is at the standard value.
Standard value: approximately 10
°
BTDC
NOTE: The ignition timing may fluctuate within
±
7
°
.
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.
Standard value: 700
±
100 r/min
NOTE: The idle speed is controlled automatically
by the idle speed control system.
AK603844 AB
Air flow sensor
Mixture
adjusting
screw
MD998299
AC608423
Diagnosis
connector
MB991827
MB991824
MB991910
AC
AK602718
No. 1 Ignition coil
AC
Summary of Contents for PAJERO IV
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