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3-80 FUEL SYSTEM (DFI)
Fuel Pump
•
Connect the hand tester (25 V DC) to the fuel pump con-
nector [A] with needle adapter set.
Front [
B]
Special Tools - Hand Tester: 57001–1394
Needle Adapter Set: 57001–1457
○
Measure the operating voltage with the engine stopped,
and with the connector joined.
•
Turn the ignition switch ON.
○
The tester needle should indicate battery voltage for 3
seconds, and then 0 V.
Pump Operating Voltage at Pump
Connections to Pump Connectors
Teste
r(+)→ Y/R Lead
Tester (–) → BK/W Lead
Operating Voltage at Pump Connector
Standard: Battery Voltage (12.6 V or more) for 3
seconds, and then 0 V.
If the reading stays on battery voltage, and never shows
0 V. Check the ECU and fuel pump relay.
If the voltage is in specification, but the pump doesn’t
work, replace the pump.
If there is still no battery voltage, check the pump relay
(see this chapter).
Pressure Regulator Removal
○
The pressure regulator [A] i s built into the fuel pump [B]
and cannot be removed.
Pump Screen, Fuel Filter Cleaning
○
The pump screen [A] and fuel filter [B] are built into the
pump and cannot be cleaned or checked.
If the pump screen or fuel filter is suspected of clogging
or being damaged, replace it with the fuel pump as a set.