IDLE SPEED 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 terminal No. 1 power supply line (black-white) of the ignition coil No.1. 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 note Ignition timing fluctuates about ±7°, even under normal operating condition. note It is automatically further advanced by about 5° from 10° Before Top Dead Center at higher altitudes. note Wait till approximately 1 minute passes after the engine started, and check the ignition timing when the engine stabilized. 7.Check the idle speed. Standard value: 750 ± 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. 3 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 13C - Troubleshooting - Inspection chart for trouble symptom ). 9.Remove the timing light. 10.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the M.U.T.-III.