On-Vehicle Inspection [09/2014 - 10/2015]: Procedure

1. Remove the ignition coils and spark plugs (Refer to REMOVAL [09/2014 - 10/2015] ).
2. Disconnect the 4 injector connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Disconnect the 2 injector driver connectors by the following procedures: 1) move the lock lever in the direction indicated by the arrow to release the connector lock, then 2) disconnect the connectors with wire harness lock.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Install the spark plug into the ignition coil, and then connect the ignition coil connector.
5. Ground the spark plug.
6. Visually check that sparks occur while the engine is being cranked.
   NOTE:

   • When performing the inspection, be sure to ground the hexagonal portion or the threaded portion of the spark plug.
   • Do not crank the engine for more than 2 seconds.

     For vehicles with a cranking hold function, turn the engine switch off during cranking to stop cranking.

   • If an ignition coil assembly is struck or dropped, replace it with a new one.
   • If a spark plug is struck or dropped, replace it with a new one.
7. If sparks do not occur normally in 1 or more cylinders, perform the "Ignition Coil and Spark Test" below.

1. Check that the wire harness side connector of the ignition coil with igniter is securely connected.

   Result

   Result	Proceed to
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on a malfunctioning ignition coil with igniter.
   • 1. Replace the ignition coil with a normal one.
   • 2. Perform the spark test again.

     Result

     Result	Proceed to
     NG	Go to next step
     OK	Replace ignition coil with igniter

3. Check that power is supplied to the ignition coil.
   1. Turn the engine switch on (IG).
   2. Measure the voltage according to the value(s) in the table below.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      1 (+B) - 4 (GND)	Engine switch on (IG)	11 to 14 V

      Result

      Result	Proceed to
      NG	Check wiring between engine switch and ignition coil with igniter and check ground circuit
      OK	Go to next step

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Ignition Coil)

4. Inspect the spark plugs.
   • 1. If there is a cylinder in which ignition does not occur, interchange the spark plug of that cylinder and the spark plug of a cylinder in which ignition properly occurs.
   • 2. Check that sparks occur in the cylinder in which the properly functioning spark plug was installed.

     Result

     Result	Proceed to
     NG	Inspect the ignition system (Refer to DTC P0351: Ignition Coil "A" Primary / Secondary Circuit; DTC P0352: Ignition Coil "B" Primary / Secondary Circuit; DTC P0353: Ignition Coil "C" Primary / Secondary Circuit; DTC P0354: Ignition Coil "D" Primary / Secondary Circuit; DTC P0355: Ignition Coil "E" Primary / Secondary Circuit; DTC P0356: Ignition Coil "F" Primary / Secondary Circuit [09/2014 - 10/2015] )
     OK	Replace spark plug

     NOTE:

     • If an ignition coil assembly is struck or dropped, replace it with a new one.
     • If a spark plug is struck or dropped, replace it with a new one.
5. Connect the 2 injector driver connectors by the following procedures: 1) connect the connectors with wire harness lock, then 2) move the lock lever in the direction indicated by the arrow to lock the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

6. Connect the 4 fuel injector connectors.
7. Install the spark plugs and ignition coils (Refer to INSTALLATION [09/2014 - 10/2015] ).
8. Clear the DTCs (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ).

1. Using a megohmmeter, measure the insulation resistance.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Insulation Resistance

   Tester Connection	Condition	Specified Condition
   Spark plug (terminal part) - Body ground	Always	10 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

   Ground

   HINT: 

   • If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
   • If a megohmmeter is not available, perform the following simple inspection instead.

1. Start the engine.*
2. Quickly accelerate the engine to 4000 rpm 5 times.*
   NOTE:

   *: Do not perform this step if P0300 (misfire detection) or a related DTC is stored.

3. Remove the spark plug.
4. Visually check the spark plug.

   If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

HINT: 

If there is any damage, replace the spark plug. If not, reinstall the spark plug.

Recommended Spark Plug

1. Check the spark plug electrode gap.

   Maximum electrode gap for a used spark plug

   1.3 mm (0.0512 in.)

   If the gap is more than the maximum, replace the spark plug.

   NOTE:

   Never attempt to adjust the gap of a used plug.

   Electrode gap for a new spark plug

   1.0 to 1.1 mm (0.0394 to 0.0433 in.)

If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

Standard air pressure

588 kPa (6.0 kgf/cm² , 85 psi)

Standard duration

20 seconds or less

HINT: 

Only use a spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.