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ON-VEHICLE SERVICE ENGINE MECHANICAL <4A9> 11A-14 IDLE MIXTURE CHECK M1111002102068 AC608435 MB991827 MB991824 MB991910 AB Diagnosis connector <LH drive vehicles> AC700191 MB991827 MB991824 AB Diagnosis connector <RH drive vehicles> MB991910 1. Before inspection, set the vehicle to the pre- inspection condition. 2. Turn the ignition switch to "LOCK" (OFF) position. AK802816 3 2 1 No.1 Ignition coil AB Power supply line Equipment side 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. Standard value: approximately 10 ° BTDC NOTE: . • The ignition timing may fluctuate within ± 7 ° . This is normal. • In higher altitude, the ignition timing is more ° . • Wait till approximately 1 minute passes after the 7. Run the engine at 2,000 − 3,000 r/min for 2 minutes. 8. Set the CO, HC tester. idle. Standard value CO contents: 0.3 % or less 10.If there is a deviation from the standard value, inspect the MPI system (Refer to GROUP 13A − Troubleshooting − Inspection Chart for Trouble Symptoms ) 11.Remove the timing light and CO, HC tester. and then disconnect the M.U.T.-III. VALVE CLEARANCE CHECK AND M1111001501930 NOTE: Perform the valve clearance check and |