Fuel Pump Hold Pressure Inspection
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Mazda Tribute, 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect fuel inlet hose at fuel rail. Install fuel pressure gauge to fuel inlet hose and plug fuel pressure gauge outlet hose. On 626, go to next step. On all other models, go to step 3 .
- Locate and remove fuel pump relay. Ground fuel pump relay socket terminal No. 30. Reconnect negative battery cable for 10 seconds to operate fuel pump. Disconnect negative battery cable and jumper wire. Wait 5 minutes and observe fuel pressure. See FUEL PUMP HOLD PRESSURE table. If fuel pressure is not as specified, replace fuel pump.
- Reconnect negative battery cable. Locate DLC-1 on left side of engine compartment. Connect a fused jumper wire between DLC-1 terminals F/P and GND. See Figure . Turn ignition switch on for 10 seconds to operate fuel pump. Turn ignition switch off and disconnect fused jumper wire. Wait 5 minutes and observe fuel pressure. See FUEL PUMP HOLD PRESSURE table. On all models, if fuel pressure is not as specified, replace fuel pump.
FUEL PUMP HOLD PRESSURE
| Application | Pressure psi (kg/cm2 ) |
|---|---|
| Miata, Protege, Protege5 & 626 | 50 (3.5) |
| Millenia | 21 (1.5) |
| MPV | 59.2 (4.2) |