Fuel Delivery and Air Induction: Testing and Inspection

1NZ-FXE FUEL: FUEL SYSTEM: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. CHECK FUEL PRESSURE
(a) Discharge fuel system pressure Removal.
(b) Using a voltmeter, measure the battery voltage.
Standard voltage:
11 to 14 V
(c) Disconnect the cable from the negative (-) battery terminal.
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

(d) Disconnect the fuel tube Removal.





(e) Install SST (pressure gauge) using other SST as shown in the illustration.
SST: 09268-31012
09268-41500
90467-13001
95336-08070
SST: 09268-45014
09268-41200
09268-41220
09268-41250
(f) Wipe up any gasoline.
(g) Connect the cable to the negative (-) battery terminal.
(h) Connect the Techstream to the DLC3.
(i) Measure the fuel pressure.
Standard:
304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
- If the fuel pressure is greater than the standard value, replace the fuel tank.
- If the fuel pressure is less than the standard value, check the connection of the fuel hose and fuel tank.

(j) Disconnect the Techstream from the DLC3.
(k) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(l) Start the engine.
(m) Measure the fuel pressure at idle.
Standard:
304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
(n) Stop the engine.
(o) After stopping the engine, check that the fuel pressure does not change for 5 minutes.
Standard:
147 kPa (1.5 kgf/cm2, 21 psi) or more
If the fuel pressure is not as specified, check the fuel tank or fuel injectors Testing and Inspection.
(p) After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST to prevent gasoline from spilling out.
(q) Connect the fuel tube Installation.
2. CHECK FUEL PUMP
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
NOTE: Do not start the engine.

(c) Turn the Techstream on.
(d) Select the following menu items: Power train / Engine and ECT / Active Test / Control the Fuel Pump Speed.
(e) Check the fuel pump operation while operating it with the Techstream.
If the fuel pump does not operate, replace the fuel tank.
3. INSPECT FOR FUEL LEAK
(a) Check that there are no leaks in the fuel system while fuel pressure is applied.