Mazda 2: Fuel Line Pressure
FUEL LINE 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.
- A person charged with static electricity could cause a fire or
explosion, resulting in
death or serious injury. Before performing work on the fuel system,
discharge static
electricity by touching the vehicle body.
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it
may possibly
cause damage to the fuel pipe and quick release connector. Always clean the
quick
release connector joint area before disconnecting/connecting using cloth or
soft brush,
and make sure that it is free of foreign material.
1. Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE PRECAUTION).
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION).
3. Disconnect the quick release connector. (See QUICK RELEASE CONNECTOR
REMOVAL/INSTALLATION).

4. Turn the lever of the SST parallel to the hose as shown in the figure.

5. Insert the SST quick release connector into the fuel pipe until a click is
heard.
6. Verify that the quick release connector is firmly connected by pulling it by
hand.
7. Start the fuel pump using the following procedure.
Using M-MDS
- Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION).
- Connect the M-MDS to the DLC-2.
- Using the simulation function "FP", start the fuel pump. (See ON-BOARD
DIAGNOSTIC TEST).
Without using M-MDS
- Remove the fuel pump relay.

CAUTION:
- Short the specified terminals because shorting the wrong
terminal of the relay and fuse block may cause malfunctions.
- Using a jumper wire, short fuel pump relay terminals C and D in the
relay
and fuse block.

- Connect the negative battery cable and operate the fuel pump. (See
BATTERY REMOVAL/INSTALLATION).
8. Operate the fuel pump for 10 s.
9. Measure the fuel line pressure.
- If not within the specification, inspect the following:
If it less than the specification:
- Fuel pump unit
- Fuel line for clogging or leakage
If it exceeds the specification:
Fuel pressure
- 375-450 kPa {3.57-4.18 kgf/cm2, 50.8-59.4 psi}
10. Stop the fuel pump using the following procedure.
Using M-MDS
- Using the simulation function "FP", stop the fuel pump. (See ON-BOARD
DIAGNOSTIC TEST).
Without using M-MDS
- Disconnect the negative battery cable to stop the fuel pump.
11. Measure the fuel hold pressure after 5 min.
- If not within the specification, inspect the following:
Fuel hold pressure
- 250 kPa {2.55 kgf/cm2, 36.2 psi} or more
12. Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE
PRECAUTION).
13. Disconnect the SST.
14. Connect the quick release connector. (See QUICK RELEASE CONNECTOR
REMOVAL/INSTALLATION).
15. Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION).
READ NEXT:
FUEL TANK REMOVAL/INSTALLATION
WARNING:
Repairing a fuel tank containing fuel is dangerous. Explosion or fire
may cause death or serious
injury. Always properly steam clean a fuel tank before rep
FUEL PUMP UNIT REMOVAL/INSTALLATION
WARNING:
Fuel is very flammable liquid. If fuel spills or leaks from the
pressurized fuel system, it
will cause serious injury or death and facility breakage.
QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION
WARNING:
Fuel is very flammable liquid. If fuel spills or leaks from the
pressurized fuel system, it
will cause serious injury or death and facility b
SEE MORE:
EGR VALVE REMOVAL/INSTALLATION
1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION).
2. Remove the air cleaner cover. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION).
NOTE:
Because the air cleaner cover has already been removed and accessibility
is assured,
engine coolant
NOTE
If the following occurs while driving, it
could indicate a fl at tyre.
Steering becomes diffi cult.
The vehicle begins to vibrate
excessively.
The vehicle pulls in one direction.
If you have a fl at tyre, drive slowly to a
level spot that is well off the road and out
of the way
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