Mazda Protege 5. Manual — part 151

FUEL SYSTEM

01–14–29

01–14

(2) Lift the tab on the blue locking coupler until

the fuel line can be released.

(3) Pull the fuel hose straight back.

Note

•

The blue stopper may be removed from the
quick connector. Take care not to lose it.
Reinstall it to the quick release connector
before reconnecting the fuel line.

•

The orange locking coupler has two internal
locking tabs which retain the pulsation
damper pipe. Be sure that the tab on the
locking coupler is rotated until it stops to
release two internal locking tabs.

4. Push the SST quick release connector into the

fuel distributor and fuel main hose into the SST
until a click is heard.

5. Turn the lever on the SST as shown.
6. Connect the battery negative cable.
7. Start the engine and let it idle.
8. Measure the fuel line pressure after approx. 2

min.

Fuel line pressure

210—250 kPa {2.1—2.6 kgf/cm

2

, 30—36 psi}

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FUEL SYSTEM

01–14–30

9. Disconnect the vacuum hose from the pressure

regulator and measure the fuel line pressure.

Fuel line pressure

270—310 kPa {2.7—3.2 kgf/cm

2

, 39—45 psi}

10. Turn the ignition switch off.

11. Disconnect the SST.

Note

•

A checker tab is integrated with the quick
release connector for new plastic fuel hoses.
The checker tab will be released from the
quick release connector after it is completely
engaged with the fuel pipe.

12. Inspect the plastic fuel hose and pulsation

damper sealing surface for damage and
deformation, and replace if necessary.

•

If the quick release connector O-ring is
damaged or has slipped, replace the plastic
fuel hose.

13. Apply a small amount of clean engine oil to the sealing surface of the pulsation damper.
14. Reconnect the plastic fuel hose straight to the pulsation damper until a click is heard.
15. 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.

•

If quick release connector does not move at all, verify that O-ring is not damaged and slipped, and
reconnect the quick release connector.

16. Attach the lock clip to the quick release connector

in the direction of the fuel distributor and lock it,
as shown in the figure.

17. Complete the “AFTER REPAIR PROCEDURE”.

(See 01–14–5 AFTER REPAIR PROCEDURE.)

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PULSATION DAMPER REMOVAL/INSTALLATION

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1. Remove and install the pulsation damper. (See 01–14–21 FUEL INJECTOR REMOVAL/INSTALLATION.)

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FUEL SYSTEM

01–14–31

01–14

PULSATION DAMPER INSPECTION

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1. Remove the pulsation damper. (See 01–14–21 FUEL INJECTOR REMOVAL/INSTALLATION.)
2. Visually inspect the pulsation damper for damage and cracks. Also inspect that there is no extreme rust which

will cause fuel leakage.

•

If either is observed, replace the pulsation damper.

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PRC SOLENOID VALVE REMOVAL/INSTALLATION

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1. Remove and install the PRC solenoid valve.

•

Remove the PRC solenoid valve from the intake manifold. (See 01–13A–5 INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION [ZM].)

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PRC SOLENOID VALVE INSPECTION

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Airflow Inspection

Note

•

Perform the following test only as directed.

1. Carry out the “Pressure Regulator Control Inspection”. (See 01–03A–59 Pressure Regulator Control

Inspection.) (See 01–03B–58 Pressure Regulator Control Inspection.)

•

If not as specified, perform the further inspection for the PRC solenoid valve.

2. Disconnect the negative battery cable.
3. Remove the PRC solenoid valve.
4. Inspect airflow between each port under the

following conditions.

•

If not as specified, replace the PRC solenoid
valve.

•

If as specified but the “Pressure Regulator
Control Inspection” failed, carry out the
“Circuit Open/Short Inspection”.
— If there is an open or short circuit, repair

or replace wiring harnesses.

— If there is no open or short circuit, replace

PRC solenoid valve.

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FUEL SYSTEM

01–14–32

Circuit Open/Short Inspection

1. Remove the PCM.
2. Connect the SST (104 Pin Breakout Box) to the

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m {80—110 kgf·cm, 69.5—95.4

in·lbf}

4. Inspect for an open or short circuit in the following

wiring harnesses by probing the applicable
sensor and SST (104 Pin Breakout Box) terminals
with ohmmeter leads.
Open circuit

•

Power circuit (PRC solenoid valve connector
terminal A and main relay connector terminal D through common connector)

•

GND circuit (PRC solenoid valve connector terminal B and PCM connector terminal 95)

Short circuit

•

Power circuit (PRC solenoid valve connector terminal A and main relay connector terminal D through
common connector to GND)

•

GND circuit (PRC solenoid valve connector terminal B and PCM connector terminal 95 to GND)

5. Reconnect the PRC solenoid valve connector.
6. Reconnect the negative battery cable.

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