Fuel Leakage Inspection After Pump Unit Installation; Fuel Pump Unit Disassembly/Assembly; Fuel Pump Unit Inspection; Fuel Pump Operation Inspection - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• If the specified tightening torque cannot be obtained, replace the fuel pump cap and gasket.
• If the specified tightening torque cannot be obtained after replacement of the fuel pump cap and
gasket, replace the fuel tank.
Fuel pump cap tightening torque
80-90 N·m {8.2-9.1 kgf·m, 59-66 ft·lbf}

Fuel Leakage Inspection After Pump Unit Installation

1. Before installing the fuel tank, verify that there is no leakage when a pressure of +5.9 kPa {+44 mmHg,
+1.7 inHg} is applied to the fuel tank.
2. Install the fuel tank. (See
3. Drive the vehicle starting from a standstill and brake suddenly five to six times at a low speed.
4. Stop the vehicle and verify from outside the vehicle that there is no fuel leakage around the fuel pump
unit.

FUEL PUMP UNIT DISASSEMBLY/ASSEMBLY

Note
• The fuel pump unit cannot be disassembled.

FUEL PUMP UNIT INSPECTION

Fuel Pump Operation Inspection

1. Connect the WDS or equivalent to the DLC-2.
2. Remove the fuel-filler cap.
3. Turn the ignition switch to the ON position.
4. Using the simulation function "FP", verify that operation sound is heard from the fuel pump when "FP"
is turned from OFF to ON.
Downloaded from
FUEL TANK REMOVAL/INSTALLATION.)
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