IDLE MIXTURE CHECK



1.Before inspection, set the vehicle to the pre-inspection condition.
2.Turn the ignition switch to "LOCK" (OFF) position.
3.Connect the M.U.T.-III to the diagnosis connector.

4.Set the timing light to the power supply line (terminal No. 3) of the ignition coil No. 1.
5.Start the engine and let it run at idle.
6.Check that ignition timing is at the standard value.
Standard value: approximately 10° BTDC
note
  • 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.
7.Run the engine at 2,000 - 3,000 r/min for 2 minutes.
8.Set the CO, HC tester.
9.Check the CO contents and the HC contents at idle.
Standard value
    CO contents: 0.5 % or less
    HC contents: 100 ppm or less
10.If there is a deviation from the standard value, inspect the MPI system (Refer to GROUP 13D - Troubleshooting - Inspection chart trouble symptom ).
11.Remove the HC, CO tester and timing light.
12.Turn the ignition switch to the "LOCK" (OFF) position and then disconnect the M.U.T-III.