Fuel Pump Amperage Test
NOTE:
Perform FUEL PUMP VOLUME TEST
, FUEL PUMP PRESSURE TEST
and FUEL PRESSURE LEAKDOWN TEST
before performing FUEL PUMP AMPERAGE TEST. After each repair procedure has been completed, reconnect all components. Perform TEST VER-1: POWERTRAIN VERIFICATION
under VERIFICATION TESTS to ensure system is functioning properly.
- Ensure fuel tank temperature is more than 50°F (10°C). Connect Low Current Shunt (LCS) adapter into DRB-III(R) scan tool SET 1 connector. See Fig 1 . Connect DRB-III(R) scan tool to Data Link Connector (DLC). Connect test lead cables into 10-amp (10A +) and common (-) connectors on LCS. Access MAIN MENU on scan tool. Press DVOM button.
- Use left/right arrow keys to highlight CHANNEL 1 function on scan tool. Press ENTER 3 times. Use up/down arrow keys to high light RANGE on scan tool. Press ENTER to change from 2-amp scale to 10-amp scale. Remove Power Distribution Center (PDC) cover and remove fuel pump relay. PDC is located at driver's side front corner of engine compartment, near battery. See Figure
or Figure
. Attach test leads from LCS adapter into PDC relay cavities No. 30 and 87. See Fig 2
.
Fuel pump will be operated when LCS adapter leads are connected to relay cavities. Read fuel pump amperage from DRB-III(R) scan tool screen. Amperage should be less than 10 amps. If amperage is 10 amps or more, replace fuel pump module assembly. If amperage is less than 10 amps and FUEL PUMP PRESSURE, FUEL PUMP CAPACITY and FUEL PRESSURE LEAK DOWN test readings are okay, fuel pump module is okay.
NOTE:
Changing scan tool from 2-amp to 10-amp scale must be done to avoid damage to scan tool or LCS adapter.