DR ALL-TERRAIN Service Manual Page 145

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FUEL SYSTEM (DFI) 3-81
Fuel Pump
Fuel Pump Operation Inspection
NOTE
Be sure the battery is fully charged.
Just listen to the pump sound in the fuel tank to confirm
pump operation.
Turn the ignition switch ON and make sure that the fuel
pump operates (make light sounds) for 3 seconds, and
then stops.
Turn the ignition switch OFF.
If the pump does not work as described above, inspect
the operating voltage.
Fuel Pump Operating Voltage Inspection
NOTE
Be sure the battery is fully charged.
Turn the ignition switch OFF.
Remove:
Electrical Parts Case (see Electrical Parts Case Re-
moval in the Frame chapter)
Temporary connect the ECU [A] and actuator controller
[B].
Open the fuel pump connector cap [C].
Connect the hand tester [D] DC 25 V) to the fuel pump
connector with needle adapter set.
Special Tools - Hand Tester: 57001-1394
Needle Adapter Set: 57001-1457
Pump Operating Voltage at Pump
Connections to Pump Connectors
Tester (+) W/R Lead
Tester (–) BK/Y Lead
Measure the operating voltage with the engine stopped,
and with the connector joined.
Turn the engine stop switch to run position.
Turn the ignition switch ON.
The tester needle should indicate battery voltage for 3
seconds, and then 0 V.
Operating Voltage at Pump Connector
Standard: Battery Voltage for 3 seconds, and then 0 V
If the reading stays on battery voltage, and never shows
0 V. Check the ECU for its ground and power supply (see
ECU Power Supply Inspection) and fuel pump relay.
If the voltage is in specification, but the pump doesn’t
work, replace the pump (see Fuel Pump Removal/Instal-
lation).
If there is still no battery voltage, check the pump relay
(see Relay Inspection in the Electrical System chapter).
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