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 (Refer to GROUP 00 - Precautions Before Service - M.U.T.-III Sub Assembly ).

3.Set a 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.
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
  • The ignition timing may fluctuate within ±7°. 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.
6.Run the engine at 2,000 - 3,000 r/min for 2 minutes.
7.Set the CO, HC tester.
8.Check the CO contents and the HC contents at idle.
Standard value
    CO contents: 0.3 % or less
    HC contents: 200 ppm or less
9.If there is a deviation from the standard value, inspect the MPI system (Refer to GROUP 13C - Troubleshooting - Inspection chart for trouble Symptoms )
10.Remove the timing light and CO, HC tester.
11.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the M.U.T.-III.