Mazda 6 manuals

Mazda 6 Service Manual: Fuel pump unit inspection

Caution

Note

Continuity Inspection

Note

1. Disconnect the negative battery cable.

2. Remove the service hole cover. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.)

3. Disconnect the fuel pump unit connector.


4. Inspect for continuity between fuel pump unit connector terminals B and D.

Circuit Open/Short Inspection

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


Open circuit

- Fuel pump unit terminal D (harness-side) and body GND.

- Fuel pump relay terminal D (harness-side) and fuel pump unit terminal B (harness-side).

Short circuit

- Fuel pump unit terminal D (harness-side) and power supply.

- Fuel pump unit terminal B (harness-side) and body GND.

Fuel Pump Hold Pressure Inspection

Warning

Caution

Note

1. Complete the BEFORE REPAIR PROCEDURE. (See BEFORE REPAIR PROCEDURE.)

2. Disconnect the negative battery cable.

3. Remove the air cleaner.

Caution

4. Disconnect the quick release connector from the fuel tank as follows:

(1) Push the tab on the locking coupler 90°

until it stops.

(2) Pull the fuel hose straight back.

Note



5. Cover the disconnected quick release connector with vinyl sheet or the like to prevent it from being scratched or contaminated with foreign material.


6. Turn the lever 90 degrees

against the hose of the SST

to plug the SST

outlet.


7. Push the SST

quick release connector into the fuel pipe until a click is heard.

8. Set the fuel hose into a container to avoid fuel spills.

9. Connect the negative battery cable.

Caution

10. Short the check connector terminal F/P to body GND using a jumper wire.


11. Turn the ignition switch to ON to operate the fuel pump.

12. Turn the ignition switch to LOCK position.

13. Measure the fuel pump hold pressure after 5 minutes.

- Fuel line for clogging or leakage

Fuel pump hold pressure More than 200 kPa {2.0 kgf/cm2, 29 psi}

14. Disconnect the jumper wire.

15. Disconnect the SST

.

Note


16. Inspect the plastic fuel hose and fuel pipe sealing surface for damage and deformation, and replace as necessary.

17. Apply a small amount of clean engine oil to the sealing surface of the fuel pipe.

18. Reconnect the plastic fuel hose straight to the fuel pipe until a click is heard.

19. Lightly pull and push the quick release connector a few times by hand and verify that it can move 2.0-3.0 mm {0.08-0.11 in}

and it is connected securely.

20. Complete the AFTER REPAIR PROCEDURE. (See AFTER REPAIR PROCEDURE.)

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