Fuel Delivery and Air Induction: Testing and Inspection

3MZ-FE FUEL: FUEL SYSTEM:

ON-VEHICLE INSPECTION

1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK
(a) When using the Techstream:
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to the ON position and turn the Techstream on.
NOTE: Do not start the engine.
(3) Select the following menu items: Power train / Engine / Active Test / Control the Fuel Pump Speed.
(4) Perform the ACTIVE TEST by referring to the table below.





(5) Turn the fuel pump (C/OPN relay) on.
(b) Check that there are no fuel leaks anywhere on the fuel system after performing maintenance.
2. CHECK FUEL PRESSURE
(a) Discharge fuel system pressure Service Precautions.
(b) Using a voltmeter, measure the battery voltage.
Standard voltage:
12 to 14 V
(c) Disconnect the cable from the negative (-) battery terminal.
(d) Remove the fuel pipe clamp No.1 from the fuel tube connector.
(e) Disconnect the fuel hose from the fuel main tube.






(f) Install SST (pressure gauge and fuel tube connector) as shown in the illustration.
SST: 09268-31012
90467-13001
95336-08070
09268-41500
SST: 09268-45014
09268-41200
09268-41220
09268-41250
(g) Wipe off any splattered gasoline.
(h) Reconnect the cable to the negative (-) battery terminal.
(i) Connect the Techstream to the DLC3 (see step 1 in check fuel pump operation).
(j) Measure the fuel pressure.
Fuel pressure:
304 to 343 kPa (3.1 to 3.5 kgf*cm2, 44.1 to 49.7 psi)
If the pressure is higher than the specified range, replace the fuel pressure regulator.
If the pressure is lower than the specified range, check the fuel hoses, fuel hose connections, fuel pump and fuel pressure regulator.
(k) Put the vehicle in the "inspection mode" Service Precautions.
(l) Start the engine.
(m) Measure the fuel pressure at idle.
Fuel pressure:
304 to 343 kPa (3.1 to 3.5 kgf*cm2, 44.1 to 49.7 psi)
If the pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
(n) Stop the engine.
(o) 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 injectors.
(p) After checking fuel pressure, disconnect the cable from the negative (-) battery terminal. and carefully remove SST to prevent gasoline from splashing.
(q) Reconnect the fuel tube to the fuel main tube.
(r) Install the fuel pipe clamp No.1 to the fuel tube connector.
(s) Inspect for fuel leaks (step 1).