Fuel Pump Inspection

Continuity Inspection

1. Remove the service hole cover. (See FUEL FILTER (HIGH-PRESSURE) REMOVAL/INSTALLATION.)




2. Disconnect the fuel pump connector.

3. Inspect for continuity between fuel pump connector terminals B and D using an ohmmeter.
- If there is no continuity, replace the fuel pump.

Fuel Pump Maximum Pressure Inspection

WARNING:
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, complete the "Fuel Line Safety Procedures".
- Fuel can ignite and cause serious injuries or death and damage if fuel is spilled over a hot engine. Always carry out the following procedure with the engine stopped.

1. Complete the "BEFORE REPAIR PROCEDURE".
2. Disconnect the negative battery cable.




3. Connect a fuel pressure gauge to the fuel pump and plug the outlet of the gauge as shown in the figure.
4. Connect the negative battery cable.

CAUTION: Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.




5. Short the DLC terminal F/P to body GND using a jumper wire.
6. Turn the ignition switch to ON, and measure the fuel pump pressure.

Specification:
KL: 500 - 630 kPa {5.0 - 6.5 kgf/sq.cm, 72 - 92 psi}
KJ: 630 - 800 kPa {6.4 - 8.2 kgf/sq.cm, 92 - 116 Psi}

7. Turn off the ignition switch and disconnect the jumper wire.
- If not as specified, replace the fuel pump.

8. Complete the "AFTER REPAIR PROCEDURE".

Fuel Pump Hold Pressure Inspection

WARNING:
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete the "Fuel Line Safety Procedures".
- Fuel can ignite and cause serious injuries or death and damage if it is spilled over a hot engine. Always carry out the following procedure with the engine stopped.

1. Complete the "BEFORE REPAIR PROCEDURE".
2. Disc6nnect the negative battery cable.




3. Connect a fuel pressure gauge to the fuel pump and plug the outlet of the gauge as shown in the figure.
4. Connect the negative battery cable.




5. Short the DLC terminal F/P to body GND using a jumper wire.

CAUTION: Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.

6. Turn the ignition switch to ON for approx. 10 s to operate the fuel pump.
7. Turn off the ignition switch. Wait for 5 min, and measure the fuel pressure.

Specification: More than 150 kPa {1.5 kgf/sq.cm, 21 Psi}

8. Disconnect the jumper wire.
- If not as specified, replace the fuel pump.

9. Complete the "AFTER REPAIR PROCEDURE".

FUEL PUMP (TRANSFER) INSPECTION




1. Remove the fuel pump (transfer).
2. Verify that air flows through the fuel pump from ports A and B to C.
3. Clean any clogs with compressed air.
4. Block ports B and C, apply pressure of over 167 kPa {1 .70 kgf/sq.cm, 24.2 Psi} to port A, and verify that air comes out from port D.
- If not as specified, replace the fuel pump (transfer).