Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIE2
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE FUEL: FUEL SYSTEM: PRECAUTION; 2016 MY Sienna [12/2015 - 08/2016]

PRECAUTION

1. PRECAUTION

(a) Before working on the fuel system, disconnect the cable from the negative battery terminal.

(b) Do not work on the fuel system near any open flames. Never smoke when working on this system.

(c) Keep rubber and leather parts away from gasoline.

2. DISCHARGE FUEL SYSTEM PRESSURE

CAUTION:

  • Perform the following procedure to prevent fuel from spilling out before removing any fuel system parts.
  • Even after discharging the fuel pressure, when disconnecting a fuel line, cover it with a piece of cloth to prevent fuel from spraying or coming out.

(a) Remove the circuit opening relay from the engine room relay block.

Text in Illustration

*1

Circuit Opening Relay

(b) Start the engine.

(c) After the engine stops naturally, turn the ignition switch off.

HINT:

DTC P0171 (system too lean (Bank 1)) or DTC P0174 (system too lean (Bank 2)) may be set.

(d) Crank the engine again and make sure that the engine does not start.

(e) Remove the fuel tank cap and discharge the pressure from the fuel tank.

(f) Install the circuit opening relay.

3. INJECTOR

(a) Observe the following precautions when removing and installing the fuel injector.

Text in Illustration

*1

O-Ring

*2

Delivery Pipe

*a

Correct

*b

Incorrect

  • Do not reuse the O-ring and insulator.
  • When placing a new O-ring onto the injector, do not damage the O-ring.
  • Coat the new O-ring with spindle oil or gasoline before installing it. Do not use engine oil, gear oil or brake oil.

(b) Install the injector into the delivery pipe and lower intake manifold as shown in the illustration.

Text in Illustration

*1

Delivery Pipe

*2

O-Ring

*3

Injector

*4

Insulator

*5

Intake Manifold

NOTICE:

Before installing the injector, apply spindle oil or gasoline on any place where delivery pipe or lower intake manifold contacts the O-ring of the injector.

4. FUEL SYSTEM

(a) When disconnecting the high pressure fuel line, a large amount of gasoline will spill out, so observe these procedures.

(1) Discharge the fuel system pressure.

(2) Remove the charcoal canister protector (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE EMISSION CONTROL: CANISTER: REMOVAL+ ).

(3) Disconnect the fuel tank main tube (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL TANK: REMOVAL+ ).

(4) Drain the fuel remaining inside the fuel tank main tube.

(5) Protect the contact surface by covering it with a plastic bag.

Text in Illustration

*1

Plastic Bag

NOTICE:

Do not damage the pipe or fuel tube connector, and prevent entry of foreign objects.

(6) Put a container under the connection.

(b) Observe the following precautions when disconnecting the fuel tube connector.

(1) EFI fuel pipe clamp type A:

Remove the EFI fuel pipe clamp from the tube connector.

Text in Illustration

*1

EFI Fuel Pipe Clamp

(2) EFI fuel pipe clamp type B:

Disengage the claw and remove the EFI fuel pipe clamp from the tube connector.

Text in Illustration

*1

EFI Fuel Pipe Clamp

*2

Claw

(3) Fuel tube connector cover type:

Disengage the lock claw by lifting up the cover as shown in the illustration.

Text in Illustration

*1

Fuel Tube Connector Cover

Up

(4) Check for dirt or other foreign matter on the parts to be disconnected and clean them if necessary.

Text in Illustration

*1

Retainer

*2

Nylon Tube

*3

Pipe

*4

O-Ring

*5

Fuel Tube Connector

(5) Pinch the retainer of the fuel tube connector, and then pull out the fuel tube connector to disconnect the fuel tube from the fuel pipe.

Text in Illustration

*1

Retainer

Pinch

Pull Out

NOTICE:

Do not use any tools.

(6) If the connector and pipe are stuck, pinch the retainer with your hand, and then push and pull the connector to disconnect them.

Text in Illustration

Pull

Push

NOTICE:

Do not use any tools.

(7) Check the sealing surfaces of the disconnected parts, and clean them if necessary.

(8) Protect the contact surface by covering it with a plastic bag.

Text in Illustration

*1

Plastic Bag

NOTICE:

Do not damage the pipe or fuel tube connector, and prevent entry of foreign objects.

(c) Observe the following precautions when connecting the fuel tube connectors.

Text in Illustration

Push

(1) Check that there are no scratches or foreign objects on the connecting part.

(2) Line up the pipe and connector and push them together until a "click" sound is heard.

HINT:

If the pipe is difficult to push into the connector, apply a small amount of clean engine oil to the tip of the pipe and reinsert it.

(3) After connecting the pipes, check that the pipe and connector are securely connected by pulling on them.

Text in Illustration

Pull

(4) Fuel tube connector cover type:

Engage the lock claws to the connector by pushing down on the cover.

(5) EFI fuel pipe clamp type A:

Install the EFI fuel pipe clamp to the tube connector.

(6) EFI fuel pipe clamp type B:

Engage the claw and install the EFI fuel pipe clamp to the tube connector.

(7) Inspect for fuel leaks.

(d) Observe these precautions when disconnecting the charcoal canister outlet tube connector:

Text in Illustration

*1

Fuel Tank Breather Tube Connector

*2

Pipe

*3

Nylon Tube

*4

O-Ring

(1) Check for dirt or other foreign matter on the parts to be disconnected and clean them if necessary.

(2) Pinch the retainer and pull out the fuel tank breather tube connector with the fuel tank breather tube connector pushed to the pipe side to disconnect the fuel tank breather tube from the pipe.

Text in Illustration

*1

Fuel Tank Breather Tube Connector

*2

Pipe

Push

Pinch

NOTICE:

Do not use any tools.

(3) If the connector and pipe are stuck, pinch the retainer with your hand, and then push and pull the connector to disconnect them.

NOTICE:

Do not use any tools.

(4) Check the sealing surfaces of the disconnected parts, and clean them if necessary.

(5) Protect the contact surface by covering it with a plastic bag.

NOTICE:

Do not damage the pipe or fuel tube connector, and prevent entry of foreign objects.

(e) Observe these precautions when connecting the charcoal canister outlet tube connector:

Text in Illustration

Push

(1) Check that there are no scratches or foreign objects on the connecting part.

(2) Align the fuel tank breather tube connector with the pipe, then push in the fuel tank breather tube connector until the retainer makes a "click" sound to install the fuel tank breather tube to the pipe.

(3) After connecting the pipes, check that the pipe and connector are securely connected by pulling on them.

Text in Illustration

Pull

(4) Inspect for fuel leak.

5. FUEL SUCTION TUBE WITH PUMP AND GAUGE ASSEMBLY

(a) 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.

Text in Illustration

*a

Tube

(b) When replacing the fuel filter, replace it together with the fuel suction plate sub-assembly.

6. INSPECT FOR FUEL LEAK

(a) Check that there is no fuel leakage after performing maintenance anywhere on the fuel system (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION+ ).