12v 1uo941243c Relay repairable?

[sam_sam_sam]

Re: 12v 1uo941243c Relay repairable? SOLVED

Hi everyone who helped me with this problem. Well after 3 and a half months of search and support from various mechanics and friends the problem is solved and I think you need to know what was the error and of course the solution .
At first I changed the speed sensor but it didn't solve the problem. two days ago i decided to change lambda sensor i inserted my hand behind the engine to see if i could reach it with a tool quite crowded there and guess ? it was loose trying to get it out it didn't go so i screwed it back into place with my fingers and then thought let start the car to see and what happened ? yes yes yes it really started an incredible story

Yea that would probably be the case if it completely failed this would make sense I caution you that you need to make sure that this sensor is tight before you start driving the car because if not you will destroy the the treads in the manifold and you will have more problems than you need
You might have to use a line wrench or a box end wrench to tighten if you not use anything else

[bohaboha]

Re: 12v 1uo941243c Relay repairable? SOLVED

Hi everyone who helped me with this problem. Well after 3 and a half months of search and support from various mechanics and friends the problem is solved and I think you need to know what was the error and of course the solution .
At first I changed the speed sensor but it didn't solve the problem. two days ago i decided to change lambda sensor i inserted my hand behind the engine to see if i could reach it with a tool quite crowded there and guess ? it was loose trying to get it out it didn't go so i screwed it back into place with my fingers and then thought let start the car to see and what happened ? yes yes yes it really started an incredible story

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

the diagrams i posted are the only ones i have for that car .

thanks it's great i made a single sheet of it so to have a total view and i think the solution is there. i was thinking you might have something more on your autodata. because i see more specific shema for ECM

[petehall347]

Re: 12v 1uo941243c Relay repairable?

the diagrams i posted are the only ones i have for that car .

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

Hi petehall347,redwire,sam_sam_sam,stj and everyone else who helps and helped with this thread. No it's not solved yet because the engine can't communicate with the ECM and I'm trying to solve it to move forward.Now thought maybe petehall347 c an help me with more info or any diagrams that can ease the search

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

First you need to know if you have a short circuit on any of those circuit because if it does it might not let it activate this relay for safety reasons

I am, but I'm thinking in the wrong way

[sam_sam_sam]

Re: 12v 1uo941243c Relay repairable?

First you need to know if you have a short circuit on any of those circuit because if it does it might not let it activate this relay for safety reasons

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

From the .pdf in post #50, master power relay K20 gets a 50A feed and seems to be controlled by the ECU.
It has four (output) branches - F28 15A fuel pump, F43 10A, F32 10A, F34 10A are for ECU controlled solenoid valves.
K20 also switches power to the instrument cluster.

For safety or because of fault codes, the ECU might not want to be turning on the fuel pump (master relay K20) in the first place.

that's what is shown. you said earlier: "I think OP doesn't know how to test them or is making bad conclusions leading to a goose chase?" would you like to help and tell me how i would i test please

[redwire]

Re: 12v 1uo941243c Relay repairable?

From the .pdf in post #50, master power relay K20 gets a 50A feed and seems to be controlled by the ECU.
It has four (output) branches - F28 15A fuel pump, F43 10A, F32 10A, F34 10A are for ECU controlled solenoid valves.
K20 also switches power to the instrument cluster.

For safety or because of fault codes, the ECU might not want to be turning on the fuel pump (master relay K20) in the first place.

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

those 4 fuses from before are powered by the fuel pump relay . which gets the power from that 50 amp fuse .

honestly i don't know where the 50amp and dem steel fuses on the battery look to be fully tested with continuity and volts but don't know if they are 50 amp i'll check extra tomorrow

[petehall347]

Re: 12v 1uo941243c Relay repairable?

those 4 fuses from before are powered by the fuel pump relay . which gets the power from that 50 amp fuse .

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

you said the 4 fuses all blew ?

no not blow they are ok but when testing i get 0 volt on multimeter and no light on tester

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

yes indeed . only 1 way is to be methodical with these things an study the diagrams to narrow things down .

i'm trying to search methodic. the biggest problem is to know why no current flows to these four fuses as well as no current to the crank sensor i can't find the root to them and i don't know if they comunicate with the ECM or the ECU

[petehall347]

Re: 12v 1uo941243c Relay repairable?

you said the 4 fuses all blew ?

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

all fuses and relays etc need to be installed to proceed properly .

of course it was just a thing that I wanted to try

[bohaboha]

Re: 12v 1uo941243c Relay repairable?

The fusible links all looked OK in the picture. I think OP doesn't know how to test them or is making bad conclusions leading to a goose chase?

no wonder you lose power first I had a fuse that was blown then there were four fuses that were intact but they had no power plus a friend car mechanic who wanted to help but couldn't get connected to the car computer and another thing there aren't anywhere the high amps fuses like in other cars

[petehall347]

Re: 12v 1uo941243c Relay repairable?

all fuses and relays etc need to be installed to proceed properly .

[petehall347]

Re: 12v 1uo941243c Relay repairable?

The fusible links all looked OK in the picture. I think OP doesn't know how to test them or is making bad conclusions leading to a goose chase?

yes indeed . only 1 way is to be methodical with these things an study the diagrams to narrow things down .

[redwire]

Re: 12v 1uo941243c Relay repairable?

The fusible links all looked OK in the picture. I think OP doesn't know how to test them or is making bad conclusions leading to a goose chase?

[petehall347]

Re: 12v 1uo941243c Relay repairable?

cant say if normal but i guess it is . did you replace the 50a fuse ?