On-Vehicle Inspection [01/2019 - 11/2022]: Procedure

WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, 2020 Toyota Corolla, and 2019 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM SPARK TEST

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Check for DTCs.
Powertrain > Engine and ECT > Trouble Codes

NOTE:
If any DTCs are present, perform troubleshooting in accordance with the procedure for each DTC.
Turn the ignition switch off.
Remove the 4 ignition coil assemblies and 4 spark plugs.
Refer to REMOVAL [01/2019 - 11/2022]

Disconnect the 4 injector connectors.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

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

Install the spark plug to the ignition coil assembly, and then connect the ignition coil assembly connector.
Ground the spark plug.
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.
Connect the 4 injector connectors.
Install the 4 spark plugs and 4 ignition coil assemblies.
Refer to INSTALLATION [01/2019 - 11/2022]
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Check for DTCs.
Powertrain > Engine and ECT > Trouble Codes
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs

INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST

HINT:

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

Refer to INITIALIZATION [01/2019 - 11/2022]

Check that the ignition coil assembly connector is securely connected.

Result

Result	Action
NG	Connect securely
OK	Go to next step

Perform a spark test on each ignition coil assembly.

Replace the ignition coil assembly with a known good one.

Perform the spark test again.

Result

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

Perform a spark test on each spark plug.

Replace the spark plug with a known good one.

Perform the spark test again.

Result

Result	Action
NG	Inspect the ignition system Refer to Ignition Circuit [01/2019 - 11/2022]
OK	Replace spark plug

NOTE:

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

Connect the 4 injector connectors.
Install the 4 spark plugs and 4 ignition coil assemblies.
Refer to INSTALLATION [01/2019 - 11/2022]
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Check for DTCs.
Powertrain > Engine and ECT > Trouble Codes
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs

INSPECT SPARK PLUG

NOTE:

Do not damage the iridium tip and platinum tip.
Check the iridium tip visually since the iridium tip may be damaged.
Never attempt to adjust the electrode gap of a used spark plug.
Replace with new spark plugs if extremely dirty due to sludge, etc.
Replace with new spark plugs if damaged at all.
Replace with a new spark plug if it has been struck or dropped.
When replacing with a new spark plug, do not remove the cap for protecting the spark plug tip until it is installed to the engine.

HINT:

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

Refer to INITIALIZATION [01/2019 - 11/2022]

Check the electrode.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Body Ground

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.

Alternative inspection method.
1. Start the engine.
  NOTE:
  Do not perform this step when any of the following DTCs are output: P0300, P0301, P0302, P0303, P0304 (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, P0301, P0302, P0303, P0304 (Cylinder Misfire Detected).
3. Remove the spark plug.
  Refer to REMOVAL [01/2019 - 11/2022]
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.

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	FC16HR-Q8

Check the spark plug electrode gap.

*a	Spark Plug Electrode Gap

Maximum Electrode Gap for Used Spark Plug

1.2 mm (0.0472 in.)

NOTE:

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

If the spark plug 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.)

Clean the spark plug.

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/cm ² , 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.

Install the spark plug.
Refer to INSTALLATION [01/2019 - 11/2022]

PERFORM INITIALIZATION
1. Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.
  Refer to INITIALIZATION [01/2019 - 11/2022]