Fuel Pressure: Testing and Inspection

ON-VEHICLE INSPECTION

1. CHECK FUEL PRESSURE
a. Discharge fuel system pressure.
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.




e. Install SST (pressure gauge) using other SST as shown in the illustration.

SST 09268-31011 (09268-41500, 90467-13001, 95336-08070), 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 intelligent tester (with CAN VIM) to the DLC3.
i. Measure the fuel pressure.

Standard: 304 to 343 kPa (3.1 to 3.5 kgf/sq.cm, 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 intelligent tester from the DLC3.
k. Set the vehicle to inspection mode.
l. Start the engine.
m. Measure the fuel pressure at idle.

Standard: 304 to 343 kPa (3.1 to 3.5 kgf/sq.cm, 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/sq.cm, 21 psi) or more

If the fuel pressure is not as specified, check the fuel tank or fuel injectors.

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.

2. CHECK FUEL PUMP




a. Connect the intelligent tester (with CAN VIM) to the DLC3.
b. Turn the power switch on (IG).

NOTE: Do not start the engine.

c. Turn the intelligent tester on.
d. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.

e. Check the fuel pump operation while operating it with the intelligent tester.

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.