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1.Before inspection, set the
vehicle to the pre-inspection condition.
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2.Turn the ignition switch
to the "LOCK" (OFF) position and then connect the M.U.T.-III
to the diagnosis connector (Refer to GROUP 00 -
Precautions Before Service, M.U.T.-III ).
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![](../../../img/11/ACF01013AB00ENG.png)
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3.Set the timing light to
the timing pick-up loop (white) of No. 1 ignition
coil. 4.Start the engine and run it at
idle. 5.Select item No. 2 on the M.U.T.-III to
measure engine idle speed and check that it
is approximately 650 r/min. 6.Select item No. 11
(actuator test function) on the M.U.T.-III, and set the
ignition
timing to the basic ignition timing. 7.Check that
basic ignition timing is within the standard
value. Standard value: 5° BTDC ±
3° 8.If the basic ignition timing is
outside the standard value, inspect the MPI system
(Refer to GROUP 13B - Troubleshooting -
Inspection chart for trouble symptom ).
caution |
If the test is not cancelled,
a forced driving will continue for
27 minutes. Driving under this condition may
damage the engine.
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9.Cancel the actuator test function item No.
11, Basic ignition timing set mode, on
M.U.T.-III. 10.Check that ignition timing is at
the standard value. Standard value:
approximately 10° BTDC
note |
Ignition timing fluctuates
about ±7°, even under normal
operating condition.
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note |
It is automatically further
advanced by about 5° from 10° BTDC
at higher
altitudes.
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note |
Wait till approximately 1
minute passes after the engine started, and
check the ignition
timing when the engine stabilized.
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11.Remove the timing light. 12.Turn
the ignition switch to the "LOCK" (OFF) position and then
remove the M.U.T.-III.
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