2005 Mazda 3 Fuel Line Pressure Inspection
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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 “BEFORE SERVICE PRECAUTION” before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION.) 2. Disconnect the negative battery cable. 3. Disconnect the quick release connector (in the engine compartment). (See QUICK RELEASE CONNECTOR (FUEL SYSTEM) 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 WDS or equivalent Zoom
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 “BEFORE SERVICE PRECAUTION” before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION.) 2. Disconnect the negative battery cable. 3. Disconnect the quick release connector (in the engine compartment). (See QUICK RELEASE CONNECTOR (FUEL SYSTEM) 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 WDS or equivalent Zoom
1. Connect the WDS or equivalent to the DLC-2. 2. Start the fuel pump
using the “FP” simulation function. Not using WDS or equivalent Zoom
1. Remove the fuel pump relay. CAUTION: Be careful to short the
specified terminal as shorting the wrong terminal of the main fuse block
may cause a malfunction. 2. Using a jumper wire, short fuel pump relay
terminals C and D and connect the negative battery cable to start the
fuel pump. 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 leakage If it
exceeds the specification: Pressure regulator Fuel pressure
(Reference) 350-410 kPa {3.57-4.18 kgf/sq.cm, 50.8-59.4 psi} 10. Stop
the fuel pump using the following procedure: Using WDS or equivalent
1. Stop the fuel pump using the “FP” simulation function. Not using WDS
or equivalent 1. 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 line for clogging
or leakage
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