Fuel Pump Resistor/Relay; Transfer Pump Control - Mazda 323 Workshop Manual Supplement

F2
FUEL SYSTEM
93GOF2-726
FUEL PUMP RESISTOR/RELAY [BP TURBO]
The fuel
pump resistorlretay supplies battery voltage to the
fuel pump when the ECU 11 circuit is OFF, and approx. 1 OV
when the ECU 11 circuit is ON. It is mounted on the firewall.
TRANSFER PUMP CONTROL
Outline
The fuel tank is buitt with separate right and left sections to accommodate the.
installation of
the propeller
shaft. As fuel is puited from the right side of the tank, the
transfer pump pumps the fuel from the left to
the
right (fuel pumb) side to balance the fuel level.
FUEL IN LEFT TANK
I
FUEL PUMP CONTROL. UNIT
/
TRANSFER PUMP
TRANSFER PUMP SWITCH: OFF
NO FUEL IN LEFT
TANK
FUEL PUMP CONTROL UNIT
/
TRiNSFER PUMP
TRANSFER PUMP SWITCH: UN
93GOF2-727
Operation
1. Whenever the ignition switch is ON and fuel is in the left (transfer pump)
side of the fuel tank the fuel pump
switch is open, the transfer pump circuit in the fuel pump control unit is
closed,
and the transfer pump
operates.
2. When the fuel in the left side of the tank drips betow a specified point, the fuel pump switch is grounded
and the transfer pump stops operation.
3. To prevent the transfer pump from
being
turned ON and OFF repeatedly, possibly shorting the life of the
pump, when the vehicle is driven on a rough
road
and
the fuel level is low, there is a
ten-second
delay
circuit in the control unit to delay the turning ON and OFF the pump.
f2--I 8