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Starter relay coil 2003 mazda protege 512/24/2023 ![]() It is usually not the problem, but it is part of the checks for fuel pump operation. It is usually found under center of dash. There is also the circuit opening relay tied in to fuel pump operation. Check the 7.5 amp ignition fuse and the 15 amp EFI fuse and the EFI main relay, all located in the fuse box next to your battery. Not saying I know them all, it is Firmware logic in the PCM.Īre you sure it's running when cranking? It should have come on when key turned on. If pump is dead (voltage dead) to pump cranking, no longer than 10seonds(not overheating starter)į6 wire at ECU/PCM is check next or at FP relay.Ĭheck all pins of FP relay for correct voltage cranked (dead engine STARTER Good)Īnd be fully aware of all ways the PCU will shut down the FP relay ![]() So PCM F6 dark green/white wire is what energizes the FP relay coil. then oil pressure good susains the fuel pump relay. ![]() Oops this 2.2 L puppy has oil pressure switch that kills the pump fast after a short run of he engine, saving it.Īll fuses must be good, top PCM too, f9/10Īnd check engine light good must glow key on or PCM is dead It does not work like say a swimming pool pump.sorry It's home users (DIY guys that do no know this ) so here is my lil' hints. deep inside.Īll this is covered in ASE classes to techs. On some cars fuel relay goes off one if spark is lost and for sure injectors are shut down spark seen dead. from broken fuel lines, and is USA law too this. did.Ĭrash ,engine stalls and pump goes off line and not a huge fire. These rules in the PCM prevents crash and burn, like Ms Heche(RIP). I can only assume cranking works all good? The PCM energizes the relay pump if you crank the starter ![]() Next is the relay, most have 4 pins as yours does. So on dead engine all techs know this and crank at the same time measure the 2 power pins to the pump. (keyed on only not cranked) and then.Īnd for sure the same relay closes full time, cranking or running. The pump only runs key on for 1 or 3 seconds,called the injector PRIMING state. Your doing the tests wrong (best I can tell) ![]()
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