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 (black-white) of the No. 1 ignition coil.
note The power supply line is looped and also longer than the other ones.
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
7.Run the engine at 2,500 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: 0.3 % or less
    HC contents: 200 ppm or less
10.If there is a deviation from the standard value, check the following items:
11.
  • Diagnosis output
  • Fuel pressure
  • Injector
  • Ignition coil, spark plug
  • Evaporative emission control system
  • Compression pressure
note Replace the three way catalyst when the CO and HC contents are not within the standard value, even though the result of the inspection is normal on all items.
12.Remove the timing light and CO, HC tester.
13.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the M.U.T.-III.