Fuel Pressure Release: Service and Repair
1UR-FSE FUEL: FUEL SYSTEM: PRECAUTION
CAUTION:
* Before working on the fuel system, disconnect the cable from the negative (-) battery terminal.
* Do not smoke or be near an open flame when working on the fuel system.
* Keep gasoline away from rubber or leather parts.
* Do not allow fuel to spray when removing the pipe between the high pressure side fuel pump and the fuel injector. The fuel in the pipe is highly pressurized.
NOTICE:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
1. DISCHARGE FUEL SYSTEM PRESSURE
CAUTION:
* Do not disconnect any part of the fuel system until you have discharged the fuel system pressure.
* Even after discharging the fuel pressure, place a piece of cloth or equivalent over fittings as you separate them to reduce the risk of fuel spray on yourself or in the engine compartment.
* Allow the engine to cool down before performing the following procedures, as the high pressure side's fuel pressure does not decrease until the engine cools down.
NOTICE:
Perform these procedures with the engine coolant temperature at 60°C (140°F) or less.
(a) for Power Seat:
Remove the rear seat assembly LH Removal.
(b) for Ottoman:
Remove the rear seat assembly LH Removal.
(c) for Fixed Seat Type:
Remove the rear seat assembly Removal.
(d) Disconnect the fuel pump connector.
(e) Start the engine.
(f) After the engine has stopped on its own, turn the engine switch off.
HINT
DTC P3190, P3191, P0171, P0172 and/or P0A0F may be set.
(g) Try to start the engine again, then check that the engine does not start.
(h) Loosen the fuel tank cap, then discharge the pressure in the fuel tank completely.
(i) Connect the fuel pump connector.
(j) for Power Seat:
Install the rear seat assembly LH Installation.
(k) for Ottoman:
Install the rear seat assembly LH Installation.
(l) for Fixed Seat Type:
Install the rear seat assembly Installation.
2. FUEL SYSTEM
(a) When disconnecting the fuel pressure line, a large amount of gasoline will spill out. Follow the following procedures:
(1) Discharge the fuel system pressure.
(2) Put a container under the connection.
(3) Disconnect the fuel pump tube.
(4) Drain the fuel remaining inside the fuel pump tube into the container.
(5) To protect the disconnected fuel pump tube from damage and contamination, cover it with a plastic bag.
(b) Observe the following precautions when disconnecting the fuel tube connector (for quick type A).
(1) for Fuel Pipe Clamp Type:
Remove the fuel pipe clamp.
(2) for Retainer Type:
(2) Pull up the retainer to release the lock.
(3) Check for foreign matter on the pipe and around the connector before disconnecting it. Clean it if necessary.
(4) Pinch the connector and disconnect the connector and pipe.
(4) If the connector and pipe are stuck, pinch the connector, and push and pull the pipe to disconnect them.
NOTICE:
Do not use any tools in this procedure.
(5) Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
(6) To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
(c) Observe the following precautions when connecting the fuel tube connector (for quick type A).
(1) Check that there is no damage or foreign matter on the part of the pipe that contacts the connector.
(2) Align the axis of the connector with the axis of the pipe. Push the pipe into the connector until the connector makes a "click" sound. If the connection is too tight, apply a light coat of fresh engine oil to the tip of the pipe.
(3) After connecting the pipe and connector, try to pull them apart to confirm that they are securely connected.
(d) for Fuel Pipe Clamp Type:
Install the fuel pipe clamp.
(e) for Retainer Type:
Push down the retainer to lock it.
(f) Observe the following precautions when disconnecting the fuel tube connector (for quick type B).
(1) Check that there is no damage or foreign matter on the part of the pipe that contacts the connector.
(2) Detach the 2 claws of the connector retainer. Push down on the connector and disconnect it from the pipe.
HINT
If the connector and pipe are stuck, pinch the fuel pipe by hand, and push and pull the connector to disconnect it.
NOTICE:
Do not use any tools in this procedure.
(3) Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
(4) To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
(g) Observe the following precautions when connecting the fuel tube connector (for quick type B).
(1) Check for foreign matter on the pipe and around the connector before connecting it. Clean it if necessary.
(2) Align the axis of the connector with the axis of the pipe. Push the pipe into the connector, and push up on the retainer.
(3) After connecting the pipe and connector, try to pull them apart to confirm that they are securely connected.
3. CHECK FOR FUEL LEAK
(a) Check that there are no fuel leaks anywhere on the fuel system after performing maintenance Testing and Inspection.