Fuel Delivery and Air Induction: Testing and Inspection

ON-VEHICLE INSPECTION

1. CHECK FUEL PUMP

a. Connect the intelligent tester to the DLC3.
b. Turn the ignition switch to ON.

NOTE: Do not start the engine.

c. Turn the intelligent tester ON.
d. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
e. Check the fuel operation by operating it with the intelligent tester.

If the fuel pump does not operate, replace the fuel pump.

2. CHECK FUEL PRESSURE
a. Discharge the fuel system pressure.
b. Using a voltmeter, measure the battery voltage.

Standard: 9.0 to 14 V

c. Disconnect the cable from the negative battery terminal.
d. Remove the fuel pipe clamp.
e. Disconnect the fuel hose.

f. Install SST into the vehicle.

SST 09268-41048 (09268-41500, 90467-13001, 95336-08070), 09268-45014 (09268-41200, 09268-41220, 09268-41250)

g. Wipe off any spilt gasoline.
h. Connect the cable to the negative battery terminal.

Torque: 3.9 N.m (40 kgf.cm, 35 in.lbf)

i. Connect the intelligent tester to the DLC3.
j. Turn the ignition switch to ON.
k. Turn the intelligent tester ON.
l. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD /ON.
m. Measure the fuel pressure.

Standard: 281 to 287 kPa (2.87 to 2.93 kgf/sq.cm, 40.8 to 41.7 psi)

- If the pressure is too high, replace the fuel pressure regulator.
- If the pressure is too low, check the connection between the fuel hose and fuel pump.

n. Disconnect the intelligent tester from the DLC3.
o. Start the engine.
p. Measure the fuel pressure while the engine idles.

Standard: 281 to 287 kPa (2.87 to 2.93 kgf/sq.cm, 40.8 to 41.7 psi)

q. Stop the engine.
r. Check that the fuel pressure does not change for 5 minutes.

Standard: 147 kPa (1.5 kgf/sq.cm, 21 psi)

If the pressure is not as specified, check the fuel pump, pressure regulator and/or injector.

s. Discharge the fuel system pressure.
t. Disconnect the cable from the negative battery terminal.
u. Remove SST while being careful to prevent gasoline splashes.
v. Connect the fuel hose.
w. Install the fuel pipe clamp.
x. Connect the cable to the negative battery terminal.

Torque: 3.9 N.m (40 kgf.cm, 35 in.lbf)

3. CHECK FOR FUEL LEAKAGE