Transfer Pump Control Unit (Protege 4WD)
- Turn ignition on. Ensure fuel gauge reads more than half full and transfer pump operation is heard. Ground transfer pump connector Yellow/Blue wire, and verify pump stops. Remove the ground from terminal Yellow/Blue wire, and verify pump operates after about 10 seconds. If pump does not operate as specified, see TRANSFER PUMP. See Fig 1
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Courtesy of MAZDA MOTORS CORP.
- Turn ignition on. Ground fuel pump control unit terminal "M" with jumper wire. Verify that zero volts is present at control unit terminal "N". Remove the jumper wire and check that voltage is 12 volts in about 10 seconds. If voltage is not as specified, disconnect transfer pump connector. Turn ignition on. Verify that the voltage is 12 volts at terminal "N" of the transfer pump connector. If not, replace transfer pump control unit.