Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1991MPV 3D VAN CARGOREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEM (FUEL INJECTION)CIRCUIT OPENING RELAY (EXCEPT NAVAJO)
1991 Mazda MPV 3D Van Cargo
Circuit Opening Relay (Except NAVAJO)
1991 Mazda MPV 3D Van CargoSECTION Circuit Opening Relay (Except NAVAJO)
- 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.
- If voltages are okay, remove relay from vehicle. Check relay operation using a 12-volt battery source and perform resistance tests. See Fig 1 .
CIRCUIT OPENING RELAY LOCATIONS
| Application | Location |
|---|---|
| B2200, B2600i & 929 | Behind Left Kick Panel |
| Miata | Under Dash, Left Of Steering Column |
| MPV | Mounted On ECU, Under Protective Cover On Passenger Side Floor |
| MX-6 & 626 | On Fuse Block |
| Protege & 323 | On Passenger Side Of Firewall, 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 |
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:
- • 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.