On-Vehicle Inspection [12/2019 - 10/2022]: Procedure

1. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

   NOTE:

   If any DTCs are output, perform troubleshooting in accordance with the procedure for each DTC.

2. Remove the 6 ignition coil assemblies and 6 spark plugs.

   Refer to REMOVAL [12/2019 - 10/2022]

3. Disconnect the 2 No. 5 engine wire connectors (for Port Injection).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	No. 5 Engine Wire Connector
   *b	No. 6 Engine Wire Connector
   *c	No. 7 Engine Wire Connector

   NOTE:

   Perform this step in order to stop fuel injection to prevent damage to the catalyst due to unburned fuel.

4. Disconnect the No. 6 engine wire connector and No. 7 engine wire connector (for Direct Injection).
   NOTE:

   Perform this step in order to stop fuel injection to prevent damage to the catalyst due to unburned fuel.

5. Install the spark plug to the ignition coil assembly, and then connect the ignition coil assembly connector.
6. Ground the spark plug.
7. Check that spark occurs at each spark plug while the engine is being cranked.
   NOTE:

   • Be sure to ground the spark plugs when checking them.
   • Do not crank the engine for more than 2 seconds.
   • If an ignition coil assembly or spark plug has been struck or dropped, replace it.

   HINT: 

   If spark does not occur, perform the following procedure.

8. Connect the No. 6 engine wire connector and No. 7 engine wire connector (for Direct Injection).
9. Connect the 2 No. 5 engine wire connectors (for Port Injection).
10. Install the 6 spark plugs and 6 ignition coil assemblies.

    Refer to INSTALLATION [12/2019 - 10/2022]

11. Check for DTCs.

    Powertrain > Engine > Trouble Codes 

12. Clear the DTCs.

    Powertrain > Engine > Clear DTCs 

HINT: 

Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.

Refer to INITIALIZATION [12/2019 - 10/2022]

1. Check that the ignition coil assembly connector is securely connected.

   Result

   Result	Action
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil assembly.
   1. Replace the ignition coil assembly with a known good one.
   2. Perform the spark test again.

      Result

      Result	Action
      NG	Go to next step
      OK	Replace ignition coil assembly

      NOTE:

      If an ignition coil assembly or spark plug has been struck or dropped, replace it.

3. Perform a spark test on each spark plug.
   1. Replace the spark plug with a known good one.
   2. Perform the spark test again.

      Result

      Result	Action
      NG	Inspect the ignition system Refer to Ignition Circuit [12/2019 - 10/2022]
      OK	Replace spark plug

      NOTE:

      If an ignition coil assembly or spark plug has been struck or dropped, replace it.

4. Connect the No. 6 engine wire connector and No. 7 engine wire connector (for Direct Injection).
5. Connect the 2 No. 5 engine wire connectors (for Port Injection).
6. Install the 6 spark plugs and 6 ignition coil assemblies.

   Refer to INSTALLATION [12/2019 - 10/2022]

7. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

8. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

HINT: 

Perform "Inspection After Repair" after replacing a spark plug.

Refer to INITIALIZATION [12/2019 - 10/2022]

1. Check the electrode.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Body Ground

   1. Using a megohmmeter, measure the insulation resistance.

      Standard Insulation Resistance

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

      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.
2. Alternative inspection method.
   1. Start the engine.
      NOTE:

      Do not perform this step when any of the following DTCs are output: P0300-00, P0300-27, P0300-85, P0301-00, P0302-00, P0303-00, P0304-00, P0305-00, P0306-00 (Cylinder Misfire Detected).

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

      Do not perform this step when any of the following DTCs are output: P0300-00, P0300-27, P0300-85, P0301-00, P0302-00, P0303-00, P0304-00, P0305-00, P0306-00 (Cylinder Misfire Detected).

   3. Remove the spark plug.

      Refer to REMOVAL [12/2019 - 10/2022]

   4. Visually check the spark plug.

      HINT: 

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

3. Check the spark plug for any damage to its threads and insulator.

   If there is any damage, replace the spark plug.

   Recommended Spark Plug

   Manufacturer	Spark Plug Type
   DENSO	FK20HBR8

4. Check the spark plug electrode gap.

   Maximum Electrode Gap for Used Spark Plug

   1.1 mm (0.0433 in.)

   NOTE:

   Never attempt to adjust the electrode gap of a used spark plug.

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

   Standard Electrode Gap for New Spark Plug

   0.7 to 0.8 mm (0.0276 to 0.0315 in.)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Spark Plug Electrode Gap
   *b	Iridium Tip
   *c	Platinum Tip

5. Install the spark plug.

   Refer to INSTALLATION [12/2019 - 10/2022]

1. Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.

   Refer to INITIALIZATION [12/2019 - 10/2022]