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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.
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3.Set the timing light to
the power supply line (terminal No.3) of the ignition coil
No.2.
note |
The power supply line is
looped and also longer than the other
ones.
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4.Start the engine and run it at
idle. 5.Check that the idle speed is approximately
650 r/min. 6.Select No.11 of the M.U.T.-III
Actuator test. 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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