Last Modified: 11-29-2007 1.6 G
Service Category: Engine/Hybrid System Section: Fuel System
Model Year: 2008 Model: Sequoia Doc ID: RM0000028VA00BX
Title: 2UZ-FE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION (2008 Sequoia)

ON-VEHICLE INSPECTION

1. CHECK FUEL PUMP OPERATION AND FUEL LEAK

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream ON.

NOTICE:

Do not start the engine.

(c) Techstream:

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

(d) Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.

(e) Check that the pulsation damper screw rises up when the fuel pump operates.

If the operation is not as specified, check the following parts:

  • Fusible link
  • Fuses
  • Circuit opening relay
  • Fuel pump
  • ECM
  • Wiring connections

(f) Turn the ignition switch off.

(g) Disconnect the Techstream from the DLC3.

2. CHECK FUEL PRESSURE

(a) Check that the battery voltage is 11 to 14 V.

(b) Discharge fuel system pressure 2UZ-FE FUEL: FUEL SYSTEM: PRECAUTION (2008 Sequoia) .

(c) Disconnect the negative (-) terminal cable from the battery.

NOTICE:

  • Some systems need to be initialized after the cable is reconnected INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION (2008 Sequoia) .
  • After the ignition switch is turned off, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch off, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.

(d) Remove the front fuel pipe from the LH delivery pipe 2UZ-FE FUEL: FUEL INJECTOR: REMOVAL (2008 Sequoia)+ .

(e) Install the front fuel pipe and SST (pressure gauge) to the delivery pipe with the 3 gaskets and another SST (adapter).

SST: 09268-45014

09268-41200

09268-41190

90405-06167

09268-41210

90467-11009

Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)

(f) Wipe off any splattered gasoline.

(g) Reconnect the cable to the negative (-) battery terminal.

(h) Connect the Techstream to the DLC3 (refer to the "Check Fuel Pump Operation and Fuel Leak" procedure).

(i) Measure the fuel pressure.

Fuel pressure:

265 to 304 kPa (2.7 to 3.1 kgf/cm2, 38 to 44 psi)

If the pressure is high, replace the fuel pressure regulator.

If the pressure is low, check the following parts:

  • Fuel hoses and connections
  • Fuel pump
  • Fuel filter
  • Fuel pressure regulator

(j) Disconnect the Techstream from the DLC3.

(k) Start the engine.

(l) Measure the fuel pressure at idle.

Fuel pressure:

265 to 304 kPa (2.7 to 3.1 kgf/cm2, 38 to 44 psi)

(m) Stop the engine.

(n) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Fuel pressure:

147 kPa (1.5 kgf/cm2, 21 psi) or more

If the pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

(o) After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST to prevent gasoline from splashing.

(p) Reinstall the front fuel pipe to the LH delivery pipe 2UZ-FE FUEL: FUEL INJECTOR: INSTALLATION (2008 Sequoia)+ .

(q) Reconnect the negative (-) terminal cable to the battery.

(r) Check for fuel leaks (refer to the "Check Fuel Pump Operation and Fuel Leak" procedure).