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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.
1.
note |
The power supply line is looped and also longer than the other ones.
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4.Start the engine and let it run at idle. 5.Use the M.U.T.-III to measure engine idle speed and check that it is within the standard
value. Standard value: 700 ± 100 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 13A - Troubleshooting - Inspection Chart for Trouble Symptoms ).
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 on M.U.T.-III. 10.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.
- In higher altitude, the ignition timing is more advanced than the standard value
by approximately 5°.
- 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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