Circuit Opening Relay

1990 Mazda 626 LX, 4D Hatchback, 2.2 1, AutomaticSECTION Circuit Opening Relay
  1. With relay connected, ensure specified voltage is present at relay terminals. See FUEL PUMP RELAY CIRCUIT VOLTAGES table. For locations of circuit opening relay, see CIRCUIT OPENING RELAY LOCATIONS table.
    CIRCUIT OPENING RELAY LOCATIONS

    Application Location
    B2600i & 929 Behind Left Kick Panel
    Miata Under Dash, Left Of Steering Column
    MPV Mounted On ECU, Under Protective Cover On Passenger Side's Floor
    MX-6 & 626 On Fuse Block
    Protege & 323 On Passenger Side's Wall, Near ECU
    RX7 On Bracket Behind Instrument Panel
    FUEL PUMP RELAY CIRCUIT VOLTAGES

    Terminal Ignition ON Volts Ignition START Volts Idle Volts
    Fp 0 12 12
    Fc 12 0 0
    B 12 12 12
    STA 0 12 0
    E1 0 0 0
  2. If voltages are okay, remove relay from vehicle. Check relay operation using a 12-volt battery source and perform resistance tests. See Fig 1 .
Fig 1: Testing Fuel Pump Relay
G117621Courtesy of MAZDA MOTORS CORP.
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.

When to See a Mechanic

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

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