Fuel Pump (Service Code 46)
Measure the operating voltage with engine stopped and
with the connector joined.
Standard: Battery Voltage
If the reading is not battery voltage, check the wiring for
continuity (see Fuel Pump Circuit).
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation).
If the reading is in specification, but the fuel pump does
not operate, replace the fuel pump (see Fuel Pump Re-
Pressure Regulator Removal
The pressure regulator [A] is built into the fuel pump and
can not be removed.
Fuel Filter Cleaning
The fuel filter [A] is built into the pump and can not be
cleaned or checked.
If the fuel filter is suspected of clogging or being damaged,
replace it with the fuel pump as a set.
FUEL SYSTEM (DFI) 3-63