2ZR-FXE (FUEL): FUEL INJECTOR: REMOVAL; 2023 - 2025 MY Corolla Corolla HV [11/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000028GQ1
Model Year Start: 2023	Model: Corolla	Prod Date Range: [11/2022 - ]
Title: 2ZR-FXE (FUEL): FUEL INJECTOR: REMOVAL; 2023 - 2025 MY Corolla Corolla HV [11/2022 - ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during fuel injector assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
Replacement of fuel injector assembly Replacement of EGR valve assembly Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.
Replacement of inverter with converter assembly	ECU configuration	-
Replacement of inverter with converter assembly	Resolver learning	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	ECU configuration	-
	Update ECU security key	Vehicle Control History (RoB) are stored

CAUTION:

Never perform work on fuel system components near any possible ignition sources.
Vaporized fuel could ignite, resulting in a serious accident.

Do not perform work on fuel system components without first disconnecting the cable from the negative (-) auxiliary battery terminal.
Sparks could cause vaporized fuel to ignite, resulting in a serious accident.

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

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HINT:

When the cable is disconnected / reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal.

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2. DISCHARGE FUEL SYSTEM PRESSURE

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3. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

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4. REMOVE EGR PIPE WITH COOLER SUB-ASSEMBLY

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5. DISCONNECT NO. 2 VENTILATION HOSE

(a) Slide the clip and disconnect the No. 2 ventilation hose from the cylinder head cover sub-assembly.

6. DISCONNECT ENGINE WIRE

(a) Disconnect the 4 fuel injector assembly connectors.

(b) Remove the bolt.

7. DISCONNECT FUEL TUBE SUB-ASSEMBLY

(a) Open the cover of the EFI fuel pipe clamp and remove the EFI fuel pipe clamp from the fuel tube connector.

	Open
	Pull

(b) Disconnect the fuel tube sub-assembly from the fuel pipe.

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8. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY

(a) Remove the bolt to separate the clamp of the fuel delivery pipe sub-assembly from the cylinder head sub-assembly.

(b) Remove the 2 bolts and fuel delivery pipe sub-assembly with the 4 fuel injector assemblies.

NOTICE:

If fuel intrudes into the combustion chamber, there may be adverse affects to the engine main body.
Be careful not to drop the fuel injector assemblies when removing the fuel delivery pipe sub-assembly.

9. REMOVE NO. 1 DELIVERY PIPE SPACER

(a) Remove the 2 No. 1 delivery pipe spacers from the cylinder head sub-assembly.

10. REMOVE FUEL INJECTOR ASSEMBLY

(a) Pull the 4 fuel injector assemblies out of the fuel delivery pipe sub-assembly.

(b) Remove the O-ring from each fuel injector assembly.

(c) Attach a tag or label with the corresponding cylinder number to each fuel injector assembly so that they can be installed to their original locations.

NOTICE:

Cover the fuel injector assemblies with plastic bags to prevent damage and contamination.

(d) Remove the 4 injector vibration insulators from the cylinder head sub-assembly.