Fuel System
1UR-FSE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION AND FOR FUEL LEAKS
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(c) Turn the tester ON.
(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Speed.
(e) Check the fuel pump operation.
(1) Check for pressure in the fuel inlet tube from the fuel line. Check that the sound of fuel flowing in the fuel tank can be heard.
If no sound can be heard, check the integration relay, fuel pump, ECM and wiring connector.
(f) Check for fuel leaks.
(1) Check that there are no fuel leaks anywhere on the system after performing maintenance.
If there is a fuel leak, repair or replace parts as necessary.
2. CHECK FUEL PRESSURE
(a) Check that the battery positive voltage is above 12 V.
(b) Discharge the fuel system pressure Service Precautions.
(c) Disconnect the cable from the negative (-) battery terminal.
(d) When checking the fuel pressure of the direct injection side:
Disconnect the fuel pump main tube.
(1) Remove the fuel pipe clamp.
(2) Pinch the connector and pull the fuel tube Service Precautions.
CAUTION:
* Always read the precautions Service Precautions before disconnecting the fuel tube connector (quick type A).
* The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.
(e) When checking the fuel pressure of the port injection side:
Disconnect the fuel pump main tube.
(1) Remove the fuel pipe clamp.
(2) Pinch the connector and pull the fuel tube.
CAUTION:
* Always read the precautions Service Precautions before disconnecting the fuel tube connector (quick type A).
* The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.
(f) Install SST (pressure gauge) as shown in the illustration.
SST : 09268-31014
95336-08070
09268-41500
SST : 09268-45014
09268-41200
09268-41220
90467-13001
09268-41250
(g) Wipe off any gasoline.
(h) Reconnect the cable to the negative (-) battery terminal.
(i) Operate the fuel pump.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(3) Turn the tester ON.
(4) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Speed.
(j) Measure the fuel pressure.
Standard fuel pressure:
196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 psi)
If the fuel pressure is higher than the specification, replace the fuel pump (built into fuel tank).
If the pressure is lower than the specification, check the fuel hoses, connections and fuel pump (built into fuel tank).
(k) Connect the Techstream to the DLC3.
(l) Start the engine.
(m) Measure the fuel pressure at idle.
Standard fuel pressure:
196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 psi)
If the pressure is not as specified, check the fuel pump and injectors.
(n) Stop the engine.
(o) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
Standard fuel pressure:
147 kPa (1.5 kgf/cm2, 21 psi) or more
If the pressure is not as specified, check the fuel pump or injectors.
(p) After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent fuel from spilling.
(q) Reconnect the fuel pump main tube Service Precautions.
(r) Check for fuel leaks.
3. CHECK FUEL PRESSURE (for High Pressure)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the tester ON.
(d) Start and warm up the engine.
(e) Run the engine at idle.
(f) Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.
(g) Check the high pressure side fuel pressure.
Standard fuel pressure:
3500 to 4500 kPa (35.7 to 45.9 kgf/cm2, 508 to 653 psi)
If the pressure is not as specified, check the fuel pump, high pressure side fuel pump, fuel pressure sensor and wiring.
(h) Stop the engine.
4. PERFORM INITIALIZATION
(a) Perform initialization Repair Instruction - Initialization.
NOTICE:
Certain systems need to be initialized after disconnecting and reconnecting the cable to the negative (-) battery terminal.