Fuel Pressure: Testing and Inspection
ON-VEHICLE INSPECTION1. CHECK FOR FUEL PUMP OPERATION AND FUEL LEAK
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch on (IG).
NOTE: Do not start the engine.
c. Turn the hand-held tester on.
d. On the hand-held tester, select following the items: Powertrain / Engine and ETC / Active Test / Control the Fuel Pump / speed.
e. Check fuel pump operation while operating it with the hand-held tester.
f. Check that there is pressure in the fuel inlet hose.
If the fuel pump does not operate, replace it.
g. Check that there are no fuel leaks from any part of the fuel system.
h. Turn the ignition switch off.
i. Disconnect the hand-held tester from the DLC3.
2. CHECK FUEL PRESSURE
a. Discharge fuel system pressure.
b. Using a voltmeter, measure the battery voltage.
Standard: 11 to 14 V
c. Disconnect the negative (-) battery cable.
d. Disconnect the fuel hose from the fuel main tube.
e. Install SST (pressure gauge) using SST and a fuel tube connector as shown in the illustration.
SST 09268- 41048 (90467- 13001, 95336- 08070, 09268-41500), 09268-45014 (09268-41200, 09268-41220, 09268-41250, 90467-13001)
f. Wipe up any gasoline.
g. Connect the negative (-) battery cable.
h. Connect the hand-held tester to the DLC3.
i. Start the engine.
j. Measure the fuel pressure at idle.
Fuel pressure:
304 to 343 kPa (3.1 to 3.5 kgf.sq.cm, 44.1 to 49.7 psi)
- If the fuel pressure is greater than the standard value, replace the fuel pump.
- If the fuel pressure is less than the standard value, check the connection of the fuel hose and the fuel pump.
k. Stop the engine.
l. Check that the fuel pressure remains as specified for 5 minutes after the engine stops.
Fuel pressure:
147 kPa (1.5 kgf.sq.cm, 21 psi) or more
If the fuel pressure is not as specified, check the fuel pump or fuel injector.
m. After checking the fuel pressure, carefully disconnect the negative (-) battery cable, and remove the SST and fuel tube connector to prevent gasoline from splashing.
n. Reconnect the fuel tube to the main fuel tube.
o. Check for fuel leaks.