OPERATIONS AFTER ENGINE IS WARMED UP
PERIODIC INSPECTION AND MAINTENANCE
2-58
E5. CHECK ENGINE IDLING SPEED
M6020601300641
<4D56, 4M41>
1. Before inspection, set the vehicle to the
pre-inspection condition.
2. Turn the ignition switch to the "LOOK" (OFF)
position, and connect the M.U.T.-III to the
diagnosis connector.
3. Start the engine, and let it run at idle.
4. Check the idle speed.
Standard value: 650 ± 50 r/min
5. If the idle speed is not within the standard value,
inspect the diesel system (Refer to WORKSHOP
MANUAL GROUP 13
− Troubleshooting).
6. Turn the ignition switch to the "LOCK" (OFF)
position and then disconnect the M.U.T.-III.
<6G74>
1. Before inspection, set the vehicle to the
pre-inspection condition.
2. Turn the ignition switch to the "LOOK" (OFF)
position, and connect the M.U.T.-III to the
diagnosis connector.
3. Set the timing light to the terminal No.3 power
supply line (white) 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
°
BTDC. 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.
AC807654
AB
Diagnosis
connector
MB991827
MB991824
MB991910
AC807654
AB
Diagnosis
connector
MB991827
MB991824
MB991910
AK801884
No. 1 Ignition coil
AB
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