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delambo · 10-12-05, 11:09 PM

Does anyone have a wiring diagram or ECU pin data for a '92 Honda legend?

jakeyfly · 11-12-05, 12:23 AM

nothing on the legend m8, just some usa 3.2's. pin data probs differant, but if ya let me know how many plugs and how many pins per plug on pcm we can see if any are close, long shot i know but worth a look

delambo · 12-12-05, 06:17 PM

Reason for asking is I have a customer with one - no go. It has no ignition or injection pulse so I naturally suspect the ckp sensor or the factory immobiliser has gone faulty. I have looked but cant find a CKP sensor so I stripped the front out as my customer said he wanted a new cambelt fitted anyway. Didnt find a ckp sensor there but I did find a mass of cmp sensors (4 on one plate) on the right hand bank behind the pulley. They all have around the same resistance (6.7 Kohms ish), but only 2 of them give out a nice pattern. The pattern is similar to a wheel speed sensor and there is not a tooth missing on the pulley so I can only see that it can be a camshaft SPEED sensor otherwise I dont see how the ECU can determine TDC. Why would it need 4 sensors on one block? The long and short of it though is that the resin around the sensors has melted so it has obviously got very hot and 2 of the sensors clearly give a poor signal so i think it needs replacing anyway (at 118.77 +vat!! For 4 magnets with coils of wire around them!!). I see no reason for the vehicle to not run like this though? I am really doubting myself and have a horrible feeling it will not make the car run again! Any suggestions? Without a wiring diagram or at the very least some ECU pin data it will be very tricky to dignose and repair (or remove) the immobiliser. Why do I take these jobs on?!! Especialy when I am as busy as I am at the moment!

jakeyfly · 13-12-05, 08:25 AM

Hi, well thats the same line of attack i would take, i take it this is an old relick? will it have an immo??.
as for the four sensors, i agree if there is no refrence point they can only be for cam speed, 6.7K seems very high mind, maby 670ohms? just had a look on A/D and the trigger should be on crankshaft, sensor must be hiding mate.
will have another a look for info when i get to work

delambo · 13-12-05, 09:31 AM

Not exactly an old relic, its 92 K reg. The key is quite chunky and one has a red dot on it. The customer is under the impression that it has an immobiliser and he acctually believes I am barking up the wrong tree by looking at the CKP sensor but if he knows so much why is he paying me to look at it?!

fireman · 13-12-05, 06:56 PM

tell him the ecu has gone put it back together and tell him to collect it and cut ya losses. Some customers only ever stop moaning when they get the bill from Honda direct at Ã‚Â£70+ an hour then see how greatfull he will become then.

jakeyfly · 13-12-05, 11:40 PM

found some data on this now, but getting it of the program is damm tricky(can only print it or copy complete screen), heres a little on the sensors for now, i will look further tomorrow to see if i can find immo info

jakeyfly · 13-12-05, 11:47 PM

opps forgot info

delambo · 14-12-05, 06:28 PM

Jakefly, you are a legend! That is the part that I am replacing so it just clarifies what I had suspected and makes me worry a little less that I have got the wrong bit. Still dont understand how it knows where tdc is though with no reference point? Only thing I can imagine is that some of the teeth are slightly further apart than others, enough for the ECU to determine a difference but not enough to be noticed on a small handheld scope. Dont worry about the immobiliser info just yet as I am fairly sure this will fix it now. Out of interest where did you come by the info?

Telling my customer its the ECU and sending him off to Honda could cost my reputation and as a result a lot of money. I dont generally do servicing and repairs, I am a dianostic specialist and this is a trade customer who generally spends a couple of hundred quid a month with me. If I lost his confidence with a misdiagnose like that, he would probably inclined not to use me again, and not only that, he could potentially bad mouth me to lots of my other trade customers. Nice try though Fireman, I did try admiting I have no info and sending him away but he still said soldier on and see what happens.

jakeyfly · 15-12-05, 08:35 PM

Info from alldata.
yes its a strange setup. they just look like inductive sensors so any scope should pick up the waveform (what scope are you using?), if you get time can you scope them again with the new sensors an save a copy. maby worth checking both ckp at the same time, there has to be a reference of some sort as you allready said

10-12-05, 11:09 PM	#1 (permalink)
delambo Senior Member Join Date: Sep 2005 Location: infront of my pc Posts: 426 Thanks: 0 Thanked 15 Times in 6 Posts	Honda legend. Does anyone have a wiring diagram or ECU pin data for a '92 Honda legend? __________________ If it seems too good to be true, it probably is.

11-12-05, 12:23 AM	#2 (permalink)
jakeyfly Super Drunk Moderator Join Date: Oct 2005 Posts: 209 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Honda legend. nothing on the legend m8, just some usa 3.2's. pin data probs differant, but if ya let me know how many plugs and how many pins per plug on pcm we can see if any are close, long shot i know but worth a look

12-12-05, 06:17 PM	#3 (permalink)
delambo Senior Member Join Date: Sep 2005 Location: infront of my pc Posts: 426 Thanks: 0 Thanked 15 Times in 6 Posts	Re: Honda legend. Reason for asking is I have a customer with one - no go. It has no ignition or injection pulse so I naturally suspect the ckp sensor or the factory immobiliser has gone faulty. I have looked but cant find a CKP sensor so I stripped the front out as my customer said he wanted a new cambelt fitted anyway. Didnt find a ckp sensor there but I did find a mass of cmp sensors (4 on one plate) on the right hand bank behind the pulley. They all have around the same resistance (6.7 Kohms ish), but only 2 of them give out a nice pattern. The pattern is similar to a wheel speed sensor and there is not a tooth missing on the pulley so I can only see that it can be a camshaft SPEED sensor otherwise I dont see how the ECU can determine TDC. Why would it need 4 sensors on one block? The long and short of it though is that the resin around the sensors has melted so it has obviously got very hot and 2 of the sensors clearly give a poor signal so i think it needs replacing anyway (at 118.77 +vat!! For 4 magnets with coils of wire around them!!). I see no reason for the vehicle to not run like this though? I am really doubting myself and have a horrible feeling it will not make the car run again! Any suggestions? Without a wiring diagram or at the very least some ECU pin data it will be very tricky to dignose and repair (or remove) the immobiliser. Why do I take these jobs on?!! Especialy when I am as busy as I am at the moment! __________________ If it seems too good to be true, it probably is.

13-12-05, 08:25 AM	#4 (permalink)
jakeyfly Super Drunk Moderator Join Date: Oct 2005 Posts: 209 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Honda legend. Hi, well thats the same line of attack i would take, i take it this is an old relick? will it have an immo??. as for the four sensors, i agree if there is no refrence point they can only be for cam speed, 6.7K seems very high mind, maby 670ohms? just had a look on A/D and the trigger should be on crankshaft, sensor must be hiding mate. will have another a look for info when i get to work

13-12-05, 09:31 AM	#5 (permalink)
delambo Senior Member Join Date: Sep 2005 Location: infront of my pc Posts: 426 Thanks: 0 Thanked 15 Times in 6 Posts	Re: Honda legend. Not exactly an old relic, its 92 K reg. The key is quite chunky and one has a red dot on it. The customer is under the impression that it has an immobiliser and he acctually believes I am barking up the wrong tree by looking at the CKP sensor but if he knows so much why is he paying me to look at it?! __________________ If it seems too good to be true, it probably is.

13-12-05, 06:56 PM	#6 (permalink)
fireman Senior Member Join Date: Sep 2005 Posts: 197 Thanks: 0 Thanked 1 Time in 1 Post	Re: Honda legend. tell him the ecu has gone put it back together and tell him to collect it and cut ya losses. Some customers only ever stop moaning when they get the bill from Honda direct at Ã‚Â£70+ an hour then see how greatfull he will become then.

13-12-05, 11:40 PM	#7 (permalink)
jakeyfly Super Drunk Moderator Join Date: Oct 2005 Posts: 209 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Honda legend. found some data on this now, but getting it of the program is damm tricky(can only print it or copy complete screen), heres a little on the sensors for now, i will look further tomorrow to see if i can find immo info

13-12-05, 11:47 PM	#8 (permalink)
jakeyfly Super Drunk Moderator Join Date: Oct 2005 Posts: 209 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Honda legend. opps forgot info

14-12-05, 06:28 PM	#9 (permalink)
delambo Senior Member Join Date: Sep 2005 Location: infront of my pc Posts: 426 Thanks: 0 Thanked 15 Times in 6 Posts	Re: Honda legend. Jakefly, you are a legend! That is the part that I am replacing so it just clarifies what I had suspected and makes me worry a little less that I have got the wrong bit. Still dont understand how it knows where tdc is though with no reference point? Only thing I can imagine is that some of the teeth are slightly further apart than others, enough for the ECU to determine a difference but not enough to be noticed on a small handheld scope. Dont worry about the immobiliser info just yet as I am fairly sure this will fix it now. Out of interest where did you come by the info? Telling my customer its the ECU and sending him off to Honda could cost my reputation and as a result a lot of money. I dont generally do servicing and repairs, I am a dianostic specialist and this is a trade customer who generally spends a couple of hundred quid a month with me. If I lost his confidence with a misdiagnose like that, he would probably inclined not to use me again, and not only that, he could potentially bad mouth me to lots of my other trade customers. Nice try though Fireman, I did try admiting I have no info and sending him away but he still said soldier on and see what happens. __________________ If it seems too good to be true, it probably is.

15-12-05, 08:35 PM	#10 (permalink)
jakeyfly Super Drunk Moderator Join Date: Oct 2005 Posts: 209 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Honda legend. Info from alldata. yes its a strange setup. they just look like inductive sensors so any scope should pick up the waveform (what scope are you using?), if you get time can you scope them again with the new sensors an save a copy. maby worth checking both ckp at the same time, there has to be a reference of some sort as you allready said