| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028OP3 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: G16E-GTS (FUEL): FUEL SYSTEM: PRECAUTION; 2023 - 2025 MY GR Corolla [11/2022 - ] | ||
PRECAUTION
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 (-) battery terminal.
- Sparks could cause vaporized fuel to ignite, resulting in a serious accident.
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The fuel tank sub-assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the fuel tank sub-assembly may fall off the engine lifter.
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To prevent serious injury due to fuel spray from the high-pressure fuel lines, always discharge fuel system pressure before removing any fuel system components.
BEFORE WORKING ON FUEL SYSTEM
(a) Before inspecting and repairing the fuel system, disconnect the cable from the negative (-) battery terminal.
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![2023 - 2025 MY GR Corolla [11/2022 - ]; MAINTENANCE: G16E-GTS BATTERY: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Do not smoke or work near fire when handling the fuel system.
(c) Keep fuel away from rubber or leather parts.
DISCHARGE FUEL SYSTEM PRESSURE
CAUTION:
- Make sure the engine coolant temperature is 60°C (140°F) or less when performing this procedure.
- Perform the following procedure to prevent fuel from spraying before removing any fuel system parts.
- Pressure will still remain in the fuel lines even after performing the following procedure. When disconnecting a fuel line, cover it with a piece of cloth to prevent fuel from spraying or coming out.
(a) When discharging fuel system pressure by disconnecting the EFI MAIN NO. 2 relay:
(1) Remove the No. 1 relay block cover.
(2) Remove the EFI MAIN NO. 2 relay.
(3) Disconnect the fuel pump assembly connector.
(4) Start the engine. After the engine has stopped on its own, turn the engine switch off.
NOTICE:
Do not increase the engine speed or drive the vehicle while waiting for the engine to stop on its own.
(5) Crank the engine again and make sure that the engine does not start.
HINT:
DTC P008700 (Fuel Rail / System Pressure - Too Low) and P017100 (System Too Lean Bank 1) may be stored. Clear the DTCs before proceeding to the next step.
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(6) Remove the fuel tank sub-assembly cap assembly and discharge the pressure from the fuel tank sub-assembly.
(7) Disconnect the cable from the negative (-) battery terminal.
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(8) Connect the fuel pump assembly connector.
(9) Install the EFI MAIN NO. 2 relay.
(10) Install the No. 1 relay block cover.
(b) When discharging fuel system pressure by disconnecting the fuel pump connector:
(1) w/ Rear Seat Assembly:
Remove the bench type rear seat cushion assembly.
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(2) w/o Rear Seat Assembly:
Remove the rear No. 1 floor board.
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(3) w/o Rear Seat Assembly:
Remove the rear No. 1 floor board panel.
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(4) Remove the rear floor service hole cover (for LH Side).
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(5) Disconnect the fuel suction tube with pump and gauge assembly connector.
(6) Disconnect the fuel pump assembly connector.
(7) Start the engine. After the engine has stopped on its own, turn the engine switch off.
NOTICE:
Do not increase the engine speed or drive the vehicle while waiting for the engine to stop on its own.
(8) Crank the engine again and make sure that the engine does not start.
HINT:
DTC P008700 (Fuel Rail / System Pressure - Too Low) and P017100 (System Too Lean Bank 1) may be stored. Clear the DTCs before proceeding to the next step.
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(9) Disconnect the cable from the negative (-) battery terminal.
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(10) Remove the fuel tank sub-assembly cap assembly and discharge the pressure from the fuel tank sub-assembly.
(11) Connect the fuel pump assembly connector.
(12) Connect the fuel suction tube with pump and gauge assembly connector.
(13) Install the rear floor service hole cover (for LH Side).
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(14) w/ Rear Seat Assembly:
Install the bench type rear seat cushion assembly.
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(15) w/o Rear Seat Assembly:
Install the rear No. 1 floor board panel.
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(16) w/o Rear Seat Assembly:
Install the rear No. 1 floor board.
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FUEL LINE
(a) When disconnecting a high-pressure fuel line, a large amount of fuel will spray. Perform the following procedure:
(1) Discharge fuel system pressure.
(2) Disconnect the fuel tube.
(3) Drain the fuel remaining inside the fuel tube into a container.
(4) Cover the disconnected fuel pipe and fuel tube connector with plastic bags to prevent damage and contamination.
(b) Quick Type A:
Perform the following procedure when disconnecting a fuel tube connector.
NOTICE:
Remove any foreign matter on the fuel tube connector and fuel pipe before performing this work.
(1) Clamp Type A (EFI Fuel Pipe Clamp):
|
Open |
|
Pull |
Open the cover of the EFI fuel pipe clamp and remove the EFI fuel pipe clamp from the fuel tube connector.
(2) Check that there is no dirt or other foreign matter around the fuel tube connector before disconnecting it. Clean the joint if necessary.
(3) While holding the retainer at the positions shown in the illustration, pull up the retainer to disengage the lock claws.
NOTICE:
Be sure to disconnect the fuel tube connector by hand.
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*a |
Retainer |
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Retainer Holding Position |
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Pull out |
(4) Pull up the retainer while holding it at the positions shown in the illustration and pull off the fuel tube connector.
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*a |
Retainer |
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*b |
O-ring |
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*c |
Fuel Tube Connector |
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*d |
Nylon Tube |
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*e |
Fuel Pipe |
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|
Retainer Holding Position |
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|
Pull out |
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Pull off |
(5) If the fuel tube connector and fuel pipe are stuck, push and pull the fuel tube connector to release it. Pull the fuel tube connector off of the fuel pipe carefully.
NOTICE:
- Do not scratch or allow any foreign matter to get on the parts when disconnecting them as the fuel tube connector has O-rings that seal the pipe (fuel pipe).
- Do not bend, twist, pinch or kink the nylon tube.
(6) Check that there is no foreign matter on the sealing surfaces of the disconnected fuel lines. Clean them if necessary.
(7) Cover the disconnected fuel pipe and fuel tube connector with plastic bags to prevent damage and contamination.
(c) Quick Type A:
Perform the following procedure when connecting a fuel tube connector.
NOTICE:
Check that there is no damage or foreign matter on the connecting parts of the fuel lines.
(1) Align the fuel tube connector with the fuel pipe, push the fuel tube connector onto the fuel pipe, then push in the retainer to secure the connection.
NOTICE:
Confirm that the retainer makes a "click" sound when pushed.
HINT:
If it is difficult to push the fuel tube connector onto the fuel pipe, apply a small amount of clean gasoline to the tip of the fuel pipe.
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*a |
Retainer |
|
|
Push |
|
|
Push in |
(2) After connecting the fuel lines, check that the fuel pipe and fuel tube connector are securely connected by pulling on them.
(3) Clamp Type A (EFI Fuel Pipe Clamp):
Install the EFI fuel pipe clamp to the fuel tube connector and close the cover of the EFI fuel pipe clamp.
(4) Inspect for fuel leaks.
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(d) Quick Type B:
Perform the following procedure when disconnecting a fuel tube connector.
NOTICE:
Remove any foreign matter on the fuel tube connector and fuel pipe before performing this work.
(1) Pull out the retainer to disengage the lock claws and pull off the fuel tube connector.
|
*a |
Retainer |
|
*b |
Fuel Pipe |
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*c |
Fuel Tube Connector |
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*d |
O-ring |
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|
Pull out |
|
|
Pull off |
(2) If the fuel tube connector and fuel pipe are stuck, push and pull the fuel tube connector to release it. Pull the fuel tube connector off of the fuel pipe carefully.
NOTICE:
Do not scratch or allow any foreign matter to get on the parts when disconnecting them as the fuel tube connector has O-rings that seal the pipe (fuel pipe).
(3) Check that there is no foreign matter on the sealing surfaces of the disconnected fuel lines. Clean them if necessary.
(4) Cover the disconnected fuel pipe and fuel tube connector with plastic bags to prevent damage and contamination.
(e) Quick Type B:
Perform the following procedure when connecting a fuel tube connector.
NOTICE:
Check that there is no damage or foreign matter on the connecting parts of the fuel lines.
(1) Align the fuel tube connector with the fuel pipe, push the fuel tube connector onto the fuel pipe, then push in the retainer to secure the connection.
|
*a |
Retainer |
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|
Push |
|
|
Push in |
NOTICE:
Confirm that the retainer makes a "click" sound when pushed.
HINT:
If it is difficult to push the fuel tube connector onto the fuel pipe, apply a small amount of clean gasoline to the tip of the fuel pipe.
(2) After connecting the fuel lines, check that the fuel pipe and fuel tube connector are securely connected by pulling on them.
(3) Inspect for fuel leaks.
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(f) Quick Type C:
Perform the following procedure when disconnecting a fuel tube connector.
NOTICE:
Remove any foreign matter on the fuel tube connector and fuel pipe before performing this work.
(1) Pull out the retainer to disengage the lock claws and pull off the fuel tube connector.
|
*a |
Retainer |
|
*b |
Fuel Pipe |
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*c |
Fuel Tube Connector |
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*d |
O-ring |
|
|
Pull out |
|
|
Pull off |
(2) If the fuel tube connector and fuel pipe are stuck, push and pull the fuel tube connector to release it. Pull the fuel tube connector off of the fuel pipe carefully.
NOTICE:
Do not scratch or allow any foreign matter to get on the parts when disconnecting them as the fuel tube connector has an O-ring that seals the pipe (fuel pipe).
(3) Check that there is no foreign matter on the sealing surfaces of the disconnected fuel lines. Clean them if necessary.
(4) Cover the disconnected fuel pipe and fuel tube connector with plastic bags to prevent damage and contamination.
(g) Quick Type C:
Perform the following procedure when connecting a fuel tube connector.
NOTICE:
Check that there is no damage or foreign matter on the connecting parts of the fuel lines.
(1) Align the fuel tube connector with the fuel pipe, push the fuel tube connector onto the fuel pipe, then push in the retainer to secure the connection.
|
*a |
Retainer |
|
|
Push |
|
|
Push in |
NOTICE:
Confirm that the retainer makes a "click" sound when pushed.
HINT:
If it is difficult to push the fuel tube connector onto the fuel pipe, apply a small amount of clean gasoline to the tip of the fuel pipe.
(2) After connecting the fuel lines, check that the fuel pipe and fuel tube connector are securely connected by pulling on them.
(3) Inspect for fuel leaks.
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FUEL INJECTOR ASSEMBLY
(a) Observe the following precautions when removing and installing the fuel injector assemblies:
|
*1 |
O-ring |
|
*2 |
Fuel Delivery Pipe Sub-assembly |
|
*a |
Correct |
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*b |
Incorrect |
(1) Do not reuse the O-ring or injector vibration insulator.
(2) When placing a new O-ring onto the fuel injector assembly, do not damage the O-ring.
(3) Coat a new O-ring with gasoline or spindle oil before installing it.
NOTICE:
Do not use engine oil, gear oil or brake fluid.
(b) Install the fuel injector assembly into the fuel delivery pipe sub-assembly and cylinder head sub-assembly as shown in the illustration.
|
*1 |
Fuel Delivery Pipe Sub-assembly |
|
*2 |
O-ring |
|
*3 |
Injector Vibration Insulator |
|
*4 |
Fuel Injector Assembly |
NOTICE:
Apply gasoline or spindle oil to the contact surfaces of the fuel delivery pipe sub-assembly and fuel injector assembly before installing it.
FUEL SUCTION TUBE WITH PUMP AND GAUGE ASSEMBLY
NOTICE:
-
Do not disconnect the tube shown in the illustration when disassembling the fuel suction tube with pump and gauge assembly. Doing so will cause reassembly of the fuel suction tube with pump and gauge assembly to be impossible as the tube is pressed into the fuel suction plate sub-assembly.
*a
Tube
- When replacing the fuel filter, replace it together with the fuel suction plate sub-assembly.
INSPECT FOR FUEL LEAK
(a) Check that there are no fuel leaks from the fuel system after doing any maintenance or repairs.
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