SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1990B2600I LE-5, 2D PICKUP, RWD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGTRANSFER PUMP CONTROL UNIT (PROTEGE 4WD ONLY)
1990 Mazda B2600i LE-5, 2D Pickup, RWD, Standard

Transfer Pump Control Unit (Protege 4WD Only)

1990 Mazda B2600i LE-5, 2D Pickup, RWD, StandardSECTION Transfer Pump Control Unit (Protege 4WD Only)
  1. Turn ignition on. Ensure fuel gauge reads more than half full and transfer pump operation is heard. Ground transfer pump connector terminal Yellow/Blue and verify pump stops. Remove the ground from terminal Yellow/Blue and verify pump operates after about 10 seconds. If not, see TRANSFER PUMP in this article. See Figure .
  2. 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 not, 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.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.