IDLE SPEED AND MIXTURE CHECK AND ADJUSTMENT <Vehicles without catalytic converter>

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 a timing light to the power supply line (termina No. 3) of the ignition coil . 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.Check the idle speed. Standard value: 700 ± 100 r/min note The idle speed is controlled automatically by the idle speed control system. When using the, M.U.T.-III select item No. 02 and take a reading of the idle speed. 8.If the idle speed is outside the standard value, inspect the MPI system (Refer to GROUP 13A - Troubleshooting - Inspection chart for diagnosis code ). 9.Set the CO tester. 10.Check the CO contents at idle. Standard value: 1.0 ± 0.5%

11.If there is deviation from the standard value, set the idle mixture to the specified value by adjusting the mixture adjusting screw (variable resister). Use the special tool MAS screwdriver (MD998299) to turn the mixture adjusting screw. 12.Remove the timing light. 13.Turn the ignition seitch to "LOCK" (OFF) position and then disconnect the M.U.T.-III.