2ZR-FAE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION; 2020 - 2023 MY Corolla [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001GYJ8
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION; 2020 - 2023 MY Corolla [01/2019 - 11/2022]

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fan when working in the engine compartment with the engine running or the ignition switch ON.

PROCEDURE

1. PERFORM SPARK TEST

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

NOTICE:

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

(f) Turn the ignition switch off.

(g) Remove the 4 ignition coil assemblies and 4 spark plugs.

Click here

(h) Disconnect the 4 injector connectors.

NOTICE:

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

(i) Install the spark plug to the ignition coil assembly, and then connect the ignition coil assembly connector.

(j) Ground the spark plug.

(k) Check that spark occurs at each spark plug while the engine is being cranked.

NOTICE:

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.

(l) Connect the 4 injector connectors.

(m) Install the 4 spark plugs and 4 ignition coil assemblies.

Click here

(n) Turn the ignition switch to ON.

(o) Turn the Techstream on.

(p) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(q) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

(r) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

2. INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST

HINT:

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

Click here

(a) Check that the ignition coil assembly connector is securely connected.

Result	Action
NG	Connect securely
OK	Go to next step

(b) 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	Action
NG	Go to next step
OK	Replace ignition coil assembly

(1) Replace the spark plug with a known good one.

(2) Perform the spark test again.

Result

Action

Inspect the ignition system

Replace spark plug

NOTICE:

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

(d) Connect the 4 injector connectors.

(e) Install the 4 spark plugs and 4 ignition coil assemblies.

Click here

(f) Turn the ignition switch to ON.

(g) Turn the Techstream on.

(h) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(i) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

(j) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

3. INSPECT SPARK PLUG

NOTICE:

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.

Click here

(a) Check the electrode.

(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.

*a	Body Ground

(b) Alternative inspection method.

(1) Start the engine.

NOTICE:

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.

NOTICE:

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.

Click here

(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.

If there is any damage, replace the spark plug.

Recommended Spark Plug:

Manufacturer	Spark Plug Type
DENSO	FC16HR-Q8

(d) Check the spark plug electrode gap.

Maximum Electrode Gap for Used Spark Plug:

1.2 mm (0.0472 in.)

NOTICE:

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.)

*a	Spark Plug Electrode Gap

(e) 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/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.

(f) Install the spark plug.

Click here

4. PERFORM INITIALIZATION

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

Click here