[11A] ENGINE MECHANICAL <4G6-SOHC> - - ON-VEHICLE SERVICE - IGNITION TIMING CHECKPRINT PAGE / INDEX / PRIOR / NEXT
IGNITION TIMING CHECK
           
    1. Before inspection, set the vehicle to the pre-inspection condition.
    1. Turn the ignition switch to the "LOCK" (OFF) position and then connect the MUT-II/III to the diagnosis connector.
    1. Connect a timing light.
    1. Start the engine and let it run at idle.
    1. Use the MUT-II/III to measure engine idle speed and check that it is within the standard value.
      2. Standard value:
      • 750 ± 100 r/min <4G63>
      • 700 ± 100 r/min <4G64>
    1. Select No. 17 of the MUT-II/III Actuator test.
    1. Check that basic ignition timing is within the standard value.
      2. Standard value:
      • 5° BTDC ± 3°
    1. If the basic ignition timing is outside the standard value, inspect the MPI system (Refer to GROUP 13A - Troubleshooting - Inspection chart for diagnosis code <4G63> or GROUP 13B - Troubleshooting - Inspection chart for diagnosis code <4G64> ).
      2.  CAUTION
       If the test is not cancelled, a forced driving will continue for 27 minutes. Driving under this condition may damage the engine.
    1. Select a forced driving cancel mode to release the Actuator test.
    1. Check that ignition timing is at the standard value.
      2. Standard value: approximately 10° BTDC
      NOTE: 
      • The ignition timing may fluctuate within ± 7° BTDC. This is normal.
      • In higher altitude, the ignition timing is more advanced than the standard value by approximately 5°.
    1. Remove the timing light.
    1. Turn off the ignition switch and then remove the MUT-II/III.
    [11A] ENGINE MECHANICAL <4G6-SOHC> - - ON-VEHICLE SERVICE - IGNITION TIMING CHECKPRINT PAGE / INDEX / PRIOR / NEXT
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