Fuel pump relay?
11-12-2007, 11:51 AM
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Fuel pump relay?
I am looking for a diagram, or pictures of the relays for the fuel pump...or, can someone tell me where they are located?? My fuel pump works, just no voltage getting to it.....thanks
11-12-2007, 02:05 PM
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The make and model is under my post, sorry I left out the motor info, 1988 toyota 4runner, 22re SR5 5 speed, hopefully you can help me, thanks
Last edited by my4runner; 11-12-2007 at 02:06 PM.
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11-12-2007, 03:45 PM
#8
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ok a couple tips on troubleshooting the fuel pump.
check the EFI fuse first (it's located inside the engine compartment on the passengers side fuse panel)
if thats good you can test the relay, and test the wires.
note that the pump will only run with the engine running, and i dont believe it runs with the key in the on position like a lot of cars/trucks.
way more likely to be a wire break/corrosion/a fuse than the relay.
check the EFI fuse first (it's located inside the engine compartment on the passengers side fuse panel)
if thats good you can test the relay, and test the wires.
note that the pump will only run with the engine running, and i dont believe it runs with the key in the on position like a lot of cars/trucks.
way more likely to be a wire break/corrosion/a fuse than the relay.
11-12-2007, 07:04 PM
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Really common for the "circut opening relay" to corrode due to a windshield leak on the passenger side. Like other said it is above the ECU about 3". Also the window leak will sometimes make the heater relay poop out.
11-13-2007, 07:58 AM
#11
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ok a couple tips on troubleshooting the fuel pump.
check the EFI fuse first (it's located inside the engine compartment on the passengers side fuse panel)
if thats good you can test the relay, and test the wires.
note that the pump will only run with the engine running, and i dont believe it runs with the key in the on position like a lot of cars/trucks.
way more likely to be a wire break/corrosion/a fuse than the relay.
check the EFI fuse first (it's located inside the engine compartment on the passengers side fuse panel)
if thats good you can test the relay, and test the wires.
note that the pump will only run with the engine running, and i dont believe it runs with the key in the on position like a lot of cars/trucks.
way more likely to be a wire break/corrosion/a fuse than the relay.
If it's not the fuse and you find it to be they relay, depending on how it's bad there is way to "bypass" it. Simple and easy....and cheap.
11-13-2007, 08:56 AM
#13
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Have you checked the fuse yet? You ought to do that first, eh.
Bypassing is not really what you're doing, but to do it just bend the contact tab over to make constant contact. The tab is "supposed" to make contact when the ignition is switched on, but may not be....maybe from corrosion or just wear. Mine was corrosion. Anyhow, doing this means the fuel pump will come on and run continuously when you turn the key on, so you have to keep that in mind anytime you doing something with the vehicle. Also, if you ever have a wreck and the key is still on. Mine has been "bypassed" for six years now without incident. I just try avoid having wrecks...hahaha. Really, though, I intend to change it out at some point because it really is a last resort sort of fix. I've kinda been putting it off until some other things have been taken care.
EDIT: Just thought of this....you could just take some wire and double it up or whatever you need to do to fill the gap and jump the contact and see if it makes the pump run.
Bypassing is not really what you're doing, but to do it just bend the contact tab over to make constant contact. The tab is "supposed" to make contact when the ignition is switched on, but may not be....maybe from corrosion or just wear. Mine was corrosion. Anyhow, doing this means the fuel pump will come on and run continuously when you turn the key on, so you have to keep that in mind anytime you doing something with the vehicle. Also, if you ever have a wreck and the key is still on. Mine has been "bypassed" for six years now without incident. I just try avoid having wrecks...hahaha. Really, though, I intend to change it out at some point because it really is a last resort sort of fix. I've kinda been putting it off until some other things have been taken care.
EDIT: Just thought of this....you could just take some wire and double it up or whatever you need to do to fill the gap and jump the contact and see if it makes the pump run.
Last edited by thook; 11-13-2007 at 08:59 AM.
11-13-2007, 09:10 AM
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Ok, I will check all the fuses again, can you tell me exactly where any other relays and/or fuses are located for the fuel pump? If I can find out where these are, I should be able to troubleshoot a bit easier....thanks
11-13-2007, 12:59 PM
#15
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the fuse that runs the pump, as stated above, is the efi fuse, which again is located in the engine compartment, passenger side fender, in the fuse box. look at the inside top of the box and theres a "map" of which fuse is which. check that the efi fuse hasnt blown. should take less than 2 minutes even not having found it before...
its just that and the pump relay
its just that and the pump relay
Last edited by MMA_Alex; 11-13-2007 at 01:01 PM.
11-13-2007, 01:11 PM
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Thank you, I am on a mission now, hopefully by tomorrow, I will have the answer, and I can get my 4runner back on the road.....thanks everyone!!
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