On-Vehicle Inspection

HINT:

Cold and Hot in this section mean the temperature of the coils themselves. Cold is from -10°C (14°F) to 50 °C (122 °F) and Hot is from 50 °C (122 °F) to 100 °C (212 °F).

1. INSPECT IGNITION COIL ASSY AND SPARK TEST 
   1. Check for DTCs.
      NOTE: If a DTC is present, perform a troubleshooting in accordance with the procedure for that DTC.
   2. Check that sparks occur.
      1. Remove the intake air connector (see REPLACEMENT ).
      2. Remove the ignition coils.
      3. Using a 16mm (0.63 in.) plug wrench, remove the spark plugs.
      4. Install each spark plug into an ignition coil, and connect the ignition coil connectors.
      5. Disconnect the 4 injector connectors.
      6. Ground the spark plugs.
      7. Check that sparks occur at each spark plug while the engine is being cranked.
         NOTE:

         • Be sure to ground the spark plug when checking.
         • Replace the ignition coil if it has been dropped or subjected to any other impact.
         • Do not crank the engine for more than 2 seconds.

         If sparks do not occur, perform the following procedures.

         Fig 1: Identifying Spark Plug Specification Flow Chart

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      8. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.

         Torque: 18 N.m (184 kgf.cm, 13 ft.lbf) 

      9. Install the ignition coils.

         Torque: 9.0 N.m (92 kgf.cm, 80 in..lbf) 

      10. Install the intake air connector (see REPLACEMENT ).