Toyota fault code explanation

[MarkII]

Thanks for the help, we were wondering yesterday would this have been an issue.

So we got another battery, put it in the boot, and wired the fuel pump to it directly, so it was on all the time, and it made no difference, so that would eliminate that wouldnt it? If not to you have any idea where the relays ( i assume you mean it has 2) are located. 1 seems to be in the passenger footwell...

Had the battery out for a week and no change!

its this relay that's giving the trouble with your car Fred.
http://www.toyodiy.com/parts/p_J_199....html?hl=28380

[Fredericks Balls]

its this relay that's giving the trouble with your car Fred.
http://www.toyodiy.com/parts/p_J_199....html?hl=28380

You reckon? Sorry to seem like a complete twonk im useless with this stuff, but if we already wired up the pump to run directly to power (a battery) and it was on constantly and the car was still the same would that not mean that the pump wiring/relays/etc is ok?

If thats not the case, am I right in thinking there are two relays or just the one? (because you said it starts on 12v and runs on 8v)


I appreciate the help mate

[MarkII]

its two functions of one relay, it uses 12v to prime and start and 8v to run. dude the same thing happened to my jzx90.
so i tested everything, pump was fine, but the signal wasn't there to activate the pump properly.

at the time it happened to me i was building the car for track, which worked out in my favour as i done the research and knew where the prob was so when i gave the car to mcnamara in cork to build my cage they fixed it cost feck all to fix as i found the prob and they had the know how to fix it,
this was 2 years ago next feb.
my pump runs all the time now and never had a days trouble with it since.

[MarkII]

this is the other relay you were talking about on the passenger side

http://www.toyodiy.com/parts/p_J_199...html?hl=85910A

[Fredericks Balls]

Mate, i really appreciate the info. I also spoke to Nicad7 on Driftworks, he has just sold the red Irish reg'd JZX81. He had the same problem and he wired up the pump directly and with a switch and it runs all the time. He said it was starting and then just losing pressure, which sounds like your problem.


So one last thing, do you know how your pump is wired up? Is it as straight forward as wiring it straight to the battery with, say a switch on the dash even?


Thanks again for the help

[Fredericks Balls]

this is the other relay you were talking about on the passenger side

http://www.toyodiy.com/parts/p_J_199...html?hl=85910A

Thats the one we found the other night, and it was clicking. But we never actually forund the relay on the drivers side, we were trying to find exactly what you posted to find where the parts are, so i will check that tomorrow

Thanks

[MarkII]

i left it to mcnamara's to repair it,
i figured out what the problem was and that's about all i done,
as far as i know:
its been directed to a fuse and not a relay on the driver side foot well.

the day i collected the car i tested it b4 i left and it did actually fail so the lads increased a fuse size, its ran sweet ever since.

my friends mkIII 1jz supra done the same and sorted it with direct power.

[MarkII]

i meant to say that when the car has had the ecu reset it won't idol right and would cut out,it won't want to stay running, you would have to keep the foot down to stop it from cutting out and drive it and start it a good few times to have her recognise the modifications that have been done over the years.

that's one reason why i never let the ecu reset on my car any more.

if it still cuts out even with the foot kept down then its 110% that relay giving the trouble.

hope this helps you sort out your problem.

[Fredericks Balls]

Hey, with regards keeping it runnin, boot to floor on start up wont keep it running, doesnt want to run no matter what

So I raced home to try it, only to find out the relay isnt interchangable (I had hoped it was one of the silver cylindrical relays lol). I just rang Toyota and ordered one, will take max 1 week but I could have it on Wednesday. Feck it, if its changed and its no difference then at least thats the fuel system eliminated.

It has 4 prongs, the gold (power) one is all marked, like black or scorched. Maybe thats a sign it has failed?

Another suggestion was to just wire up the pump directly to a 12V supply, fuse it and put a switch on the dash, which is fine for comp use but i'd rather not for the road incase it was ever in an accident...

So all I can do is wait!

Mate, thanks again for all the help, i really do appreciate it and I will let you know how it goes

[MarkII]

alright Fred,
hows it going?
have Toyota not got the part in for ya yet???
its very odd if they haven't got it in by now!!