Continuity Test

FUEL PUMP UNIT INSPECTION

Continuity Inspection

1. Disconnect the negative battery cable.
2. Disconnect the fuel pump unit connector.




3. Inspect for continuity between fuel pump unit connector terminals B and D.
- If there is continuity, perform the "Circuit Open/Short Inspection".
- If there is no continuity, replace the fuel pump.

Circuit Open/Short Inspection




1. Inspect the following wiring harnesses for open or short circuit (continuity check).

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- Fuel pump unit terminal D and body GND.
- Fuel pump relay terminal C and fuel pump unit terminal B.

Short circuit
- If there is continuity, the circuit is short. Repair or replace the harness.
- Fuel pump unit terminal D and power supply.
- Fuel pump unit terminal B and body GND.

Hold Pressure Inspection

WARNING: Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

1. Follow the before repair procedure and perform the fuel line safety procedure.
2. Disconnect the negative battery cable.
3. Disconnect the engine compartment-side quick release connector.




4. Turn the SST lever so that it is 90 ° to the hose and then plug the outlet of the SST.
5. Reconnect the quick release connector of the SST to the fuel pipe until a click is heard.
6. Verify that the quick release connector is firmly connected by pulling it by hand.
7. Prevent the fuel spillage by placing the fuel hose outlet (rubber hose) of the SST into a container
8. Connect the negative battery cable.

CAUTION: Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.




9. Ground the check connector terminal F/P using the jumper wire.
10. Turn the ignition switch to the ON position for 10 min and then operate the fuel pump.
11. Measure the fuel pressure 5 min after turning the ignition switch to the LOCK position.
- If not within the specification, inspect the following:
- Fuel filter clogging (low-pressure side and high-pressure side)
- Fuel line clogging or leakage

Standard: 200 kPa {2.0 kgf/sq.cm, 29 psi} or more

12. Disconnect the jumper wire.
13. Follow the before repair procedure and practice the fuel line safety procedure.
14. Disconnect the SST.
15. Connect the quick release connector.
16. Inspect all parts by performing the "AFTER REPAIR PROCEDURE".