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 MANUALSMAZDA1991323 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEM (FUEL INJECTION)CIRCUIT OPENING RELAY (EXCEPT NAVAJO)
1991 Mazda 323 Base, Standard
Circuit Opening Relay (Except NAVAJO)
1991 Mazda 323 Base, StandardSECTION 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.