Fuel Pump Unit Inspection - Mazda 6 2002 Workshop Manual

2. Assemble in the reverse order of disassembly.
1 Packing
2 Fuel pump unit
3 Fuel gauge sender unit
End Of Sie

FUEL PUMP UNIT INSPECTION

Caution
• • • • It is normal to hear the fuel pump operating when the ignition switch is turned to the ON position.
Note
• To improve startability, the fuel pump control operates the fuel pump unit when the ignition switch is
turned to the ON position. Due to this, fuel pressure is rapidly increased and fuel control is stabilized.
Continuity Inspection
Note
• Perform the following inspection only when directed.
1. Disconnect the negative battery cable.
2. Remove the service hole cover. (See
3. Disconnect the fuel pump unit connector.
4. Inspect for continuity between fuel pump unit
connector terminals B and D.
• If there is no continuity, replace the fuel pump
body.
• If as specified carry out the “Circuit Open/
Short Inspection”.
Circuit Open/Short Inspection
1. Inspect the following wiring harnesses for open or
short circuit (continuity check).
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— 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
• If there is continuity, the circuit is short. Repair or
replace the harness.
— Fuel pump unit terminal D (harness-side) and
power supply.
— Fuel pump unit terminal B (harness-side) and body GND.
FUEL SYSTEM
.
F–22 FUEL PUMP UNIT REMOVAL/INSTALLATION.)
F
A6E3912W025
A6E391213350W03
A6E3912W018
A6E3912W019
F–25