Fuel Delivery and Air Induction: Testing and Inspection
1UR-FSE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION
1. CHECK FOR FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK
(a) Check fuel pump operation.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(3) Push the Techstream main switch ON.
(4) Select the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump /Speed.
(5) Check for pressure in the fuel inlet tube from the fuel line. Check that sounds of fuel flowing in the fuel tank can be heard. If no sounds can be heard, check the instrument panel junction block, fuel pump, ECM and wiring connectors.
(b) Inspect for fuel leaks.
(1) Check that there are no fuel leaks from the fuel system after performing any maintenance. If there is a fuel leak, repair or replace parts as necessary.
(c) Turn the engine switch off.
(d) Disconnect the Techstream from the DLC3.
2. CHECK FUEL PRESSURE
(a) Using a voltmeter, measure the battery voltage according to the value(s) in the table below.
Standard voltage:
(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 (for 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 : 09268-31012
09268-41500
90467-13001
95336-08070
SST : 09268-45014
09268-41200
09268-41220
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) Push the Techstream main switch ON.
(4) Select 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 to 6 kgf/cm2, 28 to 85 psi)
(j) 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 to 6 kgf/cm2, 28 to 85 psi)
(m) 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
(o) 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) Inspect 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) Push the Techstream main switch ON.
(d) Start and warm up the engine.
(e) Run the engine at idle.
(f) Select the following menus: Powertrain / Engine / Data List / Fuel Press.
(g) Check the high pressure side fuel pressure.
Standard fuel pressure:
3.5 to 4.5 MPa (35.7 to 45.9 kgf/cm2, 508 to 653 psi)
(g) If the pressure is not as specified, check the fuel pump, high pressure side fuel pump, fuel pressure sensor and wirings.
(h) Stop the engine.
4. PERFORM INITIALIZATION
(a) Perform initialization Repair Instruction - Initialization.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.