2ZR-FXE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION; 2020 - 2025 MY Corolla Corolla HV [01/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001H4XB
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - ]
Title: 2ZR-FXE (ENGINE CONTROL): IGNITION SYSTEM: ON-VEHICLE INSPECTION; 2020 - 2025 MY Corolla Corolla HV [01/2019 - ]

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

When working near the engine room while the engine has started or the power switch is on (IG), do not touch the rotating components such as the fan, etc.
Touching rotating components such as the fan, etc. could result in your hand or clothing getting caught and pulled in.

PROCEDURE

1. PERFORM SPARK TEST

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

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

(e) Check for DTCs.

Powertrain > Engine > Trouble Codes

NOTICE:

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

(f) Turn the power switch off.

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

Click here

(h) Disconnect the 4 fuel injector assembly connectors.

NOTICE:

Perform this step in order to stop fuel injection to 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) Turn the power switch on (IG).

(k) Turn the Techstream on.

(l) Put the engine in inspection mode (maintenance mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(m) Ground the spark plug.

(n) 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.

(o) Connect the 4 fuel injector assembly connectors.

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

Click here

(q) Turn the power switch on (IG).

(r) Turn the Techstream on.

(s) Enter the following menus: Powertrain / Engine / Trouble Codes.

(t) Check for DTCs.

Powertrain > Engine > Trouble Codes

(u) Clear the DTCs.

Powertrain > Engine > 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

NOTICE:

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

(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 fuel injector assembly connectors.

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

Click here

(f) Turn the power switch on (IG).

(g) Turn the Techstream on.

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

(i) Check for DTCs.

Powertrain > Engine > Trouble Codes

(j) Clear the DTCs.

Powertrain > Engine > Clear DTCs

3. INSPECT SPARK PLUG

NOTICE:

Be careful not to damage the iridium tip or platinum tip of the spark plug.
Check the iridium tip visually as it is easily damaged.
Never attempt to adjust the electrode gap of a used spark plug.
If a spark plug is extremely dirty with oil, etc., replace it.
Replace a spark plug if it is damaged.
If a spark plug has been struck or dropped, replace it.
When installing a new spark plug, do not remove the protective cap from the spark plug tip until just before installing the spark plug 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 a megohmmeter is not available, perform the following simple inspection instead.

*a	Body Ground

(b) Alternative inspection method.

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Put the engine in inspection mode (maintenance mode).

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(5) Start the engine.

NOTICE:

Do not perform this step when any of the following DTCs are output: P030000, P030027, P030085, P030100, P030200, P030300, P030400 (Cylinder Misfire Detected).

(6) Quickly accelerate the engine to 2500 rpm 5 times.

NOTICE:

Do not perform this step when any of the following DTCs are output: P030000, P030027, P030085, P030100, P030200, P030300, P030400 (Cylinder Misfire Detected).

(7) Remove the spark plug.

Click here

(8) 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-CY9

(d) Check the spark plug electrode gap.

Maximum Electrode Gap for Used Spark Plug:

1.1 mm (0.0433 in.)

NOTICE:

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:

0.8 to 0.9 mm (0.0315 to 0.0354 in.)

*a	Spark Plug Electrode Gap

(e) 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