LS 460 V8-4.6L (1UR-FSE) (2007)
Fuel Pressure Release: Service and Repair
PRECAUTION
CAUTION:
-
Before working on the fuel system, disconnect the cable from the negative (-) battery terminal.
-
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner
activation.
-
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.
NOTE: 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.
NOTE: 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.
b. for Ottoman:
Remove the rear seat assembly LH.
c. for Fixed Seat Type:
Remove the rear seat assembly.
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. Loosen the fuel tank cap, then discharge the pressure in the fuel tank completely.
h. Connect the fuel pump connector.
i.
for Power Seat:
Install the rear seat assembly LH.
j.
for Ottoman:
Install the rear seat assembly LH.
k. for Fixed Seat Type:
Install the rear seat assembly.
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.