On-Vehicle Inspection

CHECK FUEL PUMP OPERATION
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
  NOTE: Do not start the engine.
3. Select the following menu items: Powertrain/Engine and ECT/Active Test/Control the Fuel Pump Speed.
4. Touch the fuel hose in the engine compartment to check the fuel flow, and you will be able to hear the sound of the fuel pump.
5. Stop the fuel pump. If there is no fuel flow, the fuel pump may not be operating. Check the fuel pump circuit.
CHECK FUEL PRESSURE
1. Using a voltmeter, measure the battery voltage.
  Standard voltage:
  
  11 to 14 V
2. Discharge the fuel system pressure (see PRECAUTION ).
3. Disconnect the cable from the negative (-) battery terminal.
4. Disconnect the fuel main tube (see REMOVAL ).
5. Install SST (pressure gauge) using SST and a fuel tube connector as shown in the illustration.
  SST 09268-31012 (90467-13001, 95336-08070, 09268-41500), 09268-45014 (09268-41200, 09268-41220, 09268-41250)
6. Wipe up any gasoline.
7. Reconnect the cable to the negative (-) battery terminal.
8. Start the engine.
9. Measure the fuel pressure at idle.
  Standard fuel pressure:
  
  304 to 343 kPa (3.1 to 3.5 kgf/cm ² , 44 to 50 psi)
  - If the fuel pressure is greater than the standard value, replace the fuel pump.
  - If the fuel pressure is less than the standard value, check the connection of the fuel hose and the fuel pump.
10. Stop the engine.
11. Check that the fuel pressure remains as specified for 5 minutes after the engine stops.
  Standard fuel pressure:
  
  147 kPa (1.5 kgf/cm ² , 21 psi) or more
  
  If the fuel pressure is not as specified, check the fuel pump or fuel injector.
  
  Fig 1: Checking Fuel Pressure Using SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. After checking the fuel pressure, carefully disconnect the cable from the negative (-) battery terminal, and remove SST and fuel tube connector to prevent gasoline from splashing.
13. Reconnect the fuel main tube (see INSTALLATION ).
14. Inspect for fuel leaks.