Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Ok, mine is a 38770-MBG-671. So there could be something on the 2000/2001 ECU that isn't shown on the 98 service manual wiring diagram. Unfortunately, I don't know of any source for the later diagrams. It is unlikely, but possible that the later dashboard must be connected. If this was my project, I would triple check my ground circuit wiring and measure resistance from the ECU connector to the negative battery terminal. After that, I would clean the connector and pray. If this failed, I would be hunting for a 98-99 ECU. I hate recommending a replacement ECU though, it seems like a cop-out. It might actually be the culprit here though. Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 I can find no other diagram other than "98 - 01"............so it would seem they are the same, but yeah, if there are a different set of pin-outs or somethin...that would be great to know, can someone please confirm the ECU's main power "IN"(+).....and what the voltage should be?....G/R? Link to comment Share on other sites More sharing options...
Member Contributer RC1237V Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Aside from jumping the relays, I would say try your ECU in someone else's bike. We used to have a rule at the Porsche shop that if we suspected a ECU was bad we tried it in another car that we knew was working. We would never do it the other way around, in case some wiring fault was frying the ECU, or something else was amiss. A running bike is a "known quantity", yours has been modified, and has been sitting for quite sometime. If you have no one you know locally, maybe someone on this list with a fifth gen will try your ECU in their bike, and at least let you know if it is good or not. That way you know whether to look for further faults, or look for an ECU. Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 I understand and appreciate that type of troubleshooting, when available. Link to comment Share on other sites More sharing options...
Member Contributer Vee-Ef-Ar Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 I'm lead to believe this is a 00-01 wiring diagram. Could be wrong, good luck Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 I can find no other diagram other than "98 - 01"............so it would seem they are the same, but yeah, if there are a different set of pin-outs or somethin...that would be great to know, can someone please confirm the ECU's main power "IN"(+).....and what the voltage should be?....G/R? Main power in is: Pin B8, Bl/W, around 12-15 volts input The other wire you are asking about: Green/Red is the Ground Safety Circuit (Can be pulled to ground through ECU->clutch switch->sidestand swtich->chassis OR ECU->clutch diode->neutral switch->chassis I'm lead to believe this is a 00-01 wiring diagram. Could be wrong, good luck Looks like the same one I have (98-99). I see a noticeable lack of O2 sensors, which would indicate that this is not for a 00-01. Link to comment Share on other sites More sharing options...
Member Contributer Vee-Ef-Ar Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 I can find no other diagram other than "98 - 01"............so it would seem they are the same, but yeah, if there are a different set of pin-outs or somethin...that would be great to know, can someone please confirm the ECU's main power "IN"(+).....and what the voltage should be?....G/R? Main power in is: Pin B8, Bl/W, around 12-15 volts input The other wire you are asking about: Green/Red is the Ground Safety Circuit (Can be pulled to ground through ECU->clutch switch->sidestand swtich->chassis OR ECU->clutch diode->neutral switch->chassis I'm lead to believe this is a 00-01 wiring diagram. Could be wrong, good luck Looks like the same one I have (98-99). I see a noticeable lack of O2 sensors, which would indicate that this is not for a 00-01. O2 sensors are top right corner Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 I can find no other diagram other than "98 - 01"............so it would seem they are the same, but yeah, if there are a different set of pin-outs or somethin...that would be great to know, can someone please confirm the ECU's main power "IN"(+).....and what the voltage should be?....G/R? Main power in is: Pin B8, Bl/W, around 12-15 volts input The other wire you are asking about: Green/Red is the Ground Safety Circuit (Can be pulled to ground through ECU->clutch switch->sidestand swtich->chassis OR ECU->clutch diode->neutral switch->chassis I'm lead to believe this is a 00-01 wiring diagram. Could be wrong, good luck Looks like the same one I have (98-99). I see a noticeable lack of O2 sensors, which would indicate that this is not for a 00-01. O2 sensors are top right cornerAh yes, got a higher resolution image?Sent from my SGH-M919 using Tapatalk Link to comment Share on other sites More sharing options...
Member Contributer ggathagan Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Ah yes, got a higher resolution image?Sent from my SGH-M919 using Tapatalk The later versions of the manual had both versions of the wiring diagram ('98-'99 and '00-'01). Two of the PDFs of the manual in the downloads section can be zoomed in on without getting too ugly. page 558 from marriedman's manual download: http://www.vfrdiscussion.com/forum/index.php/files/download/171-98-01-honda-vfr-service-manual-optimized-bookmarked/ page 255 from HS's manual part B download: http://www.vfrdiscussion.com/forum/index.php/files/getdownload/534-1998-2001-service-manual-part-a-and-b/ Link to comment Share on other sites More sharing options...
Member Contributer Vee-Ef-Ar Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Yeah it's from one of those. I think the attaching on VFRD made it smaller. The original I have is 1mb Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 Thanks ggathagan and Vee-Ef-Ar for clarifiying the pin outs for the different year ECU's Now, from what I can see, if I'm reading it right, it was only "additions" in the 00/01 ECU....no changing of pin outs.........right? and nothing added that should alter being able to turn on fuel pump/start the engine.....right? Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 OK Fellers..........just saw somethin looks like 00/01 ignition has a 4 wire connector with resistance/voltage reference that goes back to the ECU..................since I have this wired like a 98/99 (only 3 wire) I'm guessin maybe that's why I ain't starting Soooooo......can anybody happen to help me get the correct resistance to that input of the 00/01 ECU? Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 ok kids.....I'm convinced that this is why I'm not starting............so here is what I need help with: my wire harness has this: my ECU expects this (not worried about the O2 connections, just the pink ignition one): can anybody help me wire that up somehow so I don't gotta buy more stuff? I know it's a touchy subject and don't wanna put anybody out.........happy to discuss in a PM Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Unfortunately, the later wiring diagrams don't provide any clue to the exact purpose of the pink wire. Even the switch schematic at the bottom left of the page does not indicate the connectivity of the pink wire. I don't have any first hand experiences with the 4 wire ignition switches so I can't be much help there. Some threads on this forum mention the pink wire, but none really say what it does. We would need someone with a 00/01 bike to probe the connection with the switch on/off to determine the function. All the other wires going into that connection are carrying or returning +12v. Now it may be as simple as returning +12v, or there may be a resistor in the circuit that returns a lower voltage. To complicate matters further, if the body of the switch mechanism is grounded to the chassis, then something all together different may be occurring. We would need to know: Resistance between the other 3 outputs and pink with the key on and off Resistance between pink and chassis key on/off Voltage at B13 of the ECU connector key on/off Even with this, I can still think of some other trickery employed that would confound the whole experiment. If the owner of a 00/01 bike could kindly check this, we may be able to devise a solution. Please don't post this information in the open forum, use PMs. It may still prove easier to acquire a 00/01 ignition switch with 4 wire output. The only other issue is that both the wiring diagram scans have the pink wire fade away shortly below the ignition switch, so this wire may or may not have other connections than the ECU. It looks like a direct wire though. Link to comment Share on other sites More sharing options...
Spraintz Posted April 7, 2016 Author Share Posted April 7, 2016 lol...yeah, the pinkwire fade away kinda through me for a minute........but I'm pretty confident in the straight through tho. Link to comment Share on other sites More sharing options...
lanesmatb Posted April 7, 2016 Share Posted April 7, 2016 May shed some light on the "pink" ignition wire: http://www.fireblades.org/forums/honda-fireblade/91903-1998-cbr900-rrw-ignition-diode.html http://www.fireblades.org/forums/electronics/104449-99-cbr-900-rr-ignition-switch-problem.html At least on the 900, there is a diode between the ignition and the ECM to drop the voltage and send signal to ECM. It wouldn't surprise me that the VFR has a similar setup. Scott Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 I PM'd him something very similar about the CBR929rr switch. I don't like discussing hotwiring openly, but this seems like it is pretty much all over the net already. Link to comment Share on other sites More sharing options...
Member Contributer MaxSwell Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Perhaps I can help with a spare ECU from 2000 VFR800fi or 2001 VFR800fi wrecks. I plan to combine the two into one working machine and could spare an ECU for a while for testing purposes. So let me know if I can help. Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Got a spare ignition switch? Link to comment Share on other sites More sharing options...
Member Contributer MaxSwell Posted April 7, 2016 Member Contributer Share Posted April 7, 2016 Got a spare ignition switch? Sending PM. Link to comment Share on other sites More sharing options...
Spraintz Posted April 8, 2016 Author Share Posted April 8, 2016 Man.....you guys kick ass. She is up and running!!!!! Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 8, 2016 Member Contributer Share Posted April 8, 2016 Video or it didn't happen! That and I want to hear a VFR with almost no exhaust system. Link to comment Share on other sites More sharing options...
Spraintz Posted April 8, 2016 Author Share Posted April 8, 2016 Link to comment Share on other sites More sharing options...
SEBSPEED Posted April 8, 2016 Share Posted April 8, 2016 Well then! What was the problem exactly? Link to comment Share on other sites More sharing options...
Member Contributer Cogswell Posted April 8, 2016 Member Contributer Share Posted April 8, 2016 You'll be the envy of everyone at shows you take that to. You'll fire it up and they'll say "WHOA - wazzat?" Very cool project. Congrats. Link to comment Share on other sites More sharing options...
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