OPERATIONS AFTER ENGINE IS WARMED UP
PERIODIC INSPECTION AND MAINTENANCE
2-43
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. Run the engine at 2,500 r/min for 2 minutes.
9. Set the CO, HC tester.
10.Check the CO contents and the HC contents at
idle.
Standard value
CO contents: 0.5% or less
HC contents: 100 ppm or less
11.If there is a deviation from the standard value,
inspect the MPI system (Refer to WORKSHOP
MANUAL GROUP 13
− Troubleshooting).
12.Remove the timing light.
13.Turn the ignition switch to the "LOCK" (OFF)
position and then remove the M.U.T.-III.
IDLE SPEED AND MIXTURE CHECK AND
ADJUSTMENT <6G75>
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.
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. Run the engine at 2,500 r/min for 2 minutes.
9. Set the CO, HC tester.
10.Check the CO contents and the HC contents at
idle.
Standard value
CO contents: 0.5% or less
HC contents: 100 ppm or less
11.If there is a deviation from the standard value,
inspect the MPI system (Refer to WORKSHOP
MANUAL GROUP 13
− Troubleshooting).
12.Remove the timing light.
13.Turn the ignition switch to the "LOCK" (OFF)
position and then remove the M.U.T.-III.
AC608423
Diagnosis
connector
MB991827
MB991824
MB991910
AC
AK602719
No.1 Ignition coil
AC
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