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+--- Thread: Tachometer jumps to 5K, couldn't find any info on error (/showthread.php?tid=69822)
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
OK.
access the ignitor unit. Its under the rear cowling so you will need to take this off. Take off grab bars. (4 allen bolts). Take off cowling note the screws under the cowling (metal and those plastic type things) underneath on both sides of the cowling. The ignitor unit has several plugs (harness) going into it; one harness has three wires of colour: BLUE, YELLOW, BLACK/BLUE . Remove that harness. Remove the TPS harness at the TPS sensor end (you've already done that if you have followed my instruction above). TPS Harness has the same colours. You now have two harnesses in your hand which are both ends of the TPS lead (one from TPS, one into Ignitor) Using the meter in CONTINUITY mode, check for continuity across all three wires. ie. touch BLUE on one harness end, touch BLUE on the other harness. "BEEP" ?? If three BEEPS (three colours) come back. If not then check your wiring for breaks/faults - which will be a nightmare as you will need to remove the TPS wiring from the bike so that you are holding these two harnesses on a workbench as one single end to end cable.
If you get three BEEPS, come back - wiring is good and the fault is likely to be the TPS unit which we can check simply and replace simply
As you own a fluke I'm presuming you are not a novice in electrics so am I ok to dispense with the electrical dumbing down - so as not to unduly patronise you and make this post much simpler :b
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
(03-08-14, 10:32 AM)keratos link Wrote:OK.
access the ignitor unit. Its under the rear cowling so you will need to take this off. Take off grab bars. (4 allen bolts). Take off cowling note the screws under the cowling (metal and those plastic type things) underneath on both sides of the cowling. The ignitor unit has several plugs (harness) going into it; one harness has three wires of colour: BLUE, YELLOW, BLACK/BLUE . Remove that harness. Remove the TPS harness at the TPS sensor end (you've already done that if you have followed my instruction above). TPS Harness has the same colours. You now have two harnesses in your hand which are both ends of the TPS lead (one from TPS, one into Ignitor) Using the meter in CONTINUITY mode, check for continuity across all three wires. ie. touch BLUE on one harness end, touch BLUE on the other harness. "BEEP" ?? If three BEEPS (three colours) come back. If not then check your wiring for breaks/faults - which will be a nightmare as you will need to remove the TPS wiring from the bike so that you are holding these two harnesses on a workbench as one single end to end cable.
If you get three BEEPS, come back - wiring is good and the fault is likely to be the TPS unit which we can check simply and replace simply
As you own a fluke I'm presuming you are not a novice in electrics so am I ok to dispense with the electrical dumbing down - so as not to unduly patronise you and make this post much simpler :b
Two things
1. Unplug the TPS turn on the ignition switch, does the rev counter remain at 0 or go to 3000.
now Plug the TPs back in, what does the rev counter do?
2. Keratos, You electrical test advice is good, but there is no need to remove the grab rail or remove the cowling to disconnect the ECU.
Remove the rear stop/tail light unit to give access. it is held on with to 10mm bolts behind the tool kit, you can then undo the connecters to the ECU. Have done this loads of time when fault finding and testing ECUs. A bit fiddley but a lot less hassle than removing all the cowling if you have a Givi Carrier fitted.
3. Not all meters have a beep system
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
Ahem, with respect...
Remove cowling makes it easier
He has a fluke so it has a beep system
He didn't need to do your test because he had already put the TPS in setup mode and it goes to 5k
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
Just making a point for those who may not know and have a rear rack fitted.
15 minutes will have the tail light out, your ECU to TPS test done and all back together. How can I be so sure, I did it yesterday
The simplest thing to do is remove the TPS.
Check the carburettor to ensure the projection end in not broken or damaged.
Turn the TPS using a flat screwdriver to see if the Rev counter changes and if it does replace the TPS if it remains at 5000 replace the TPS.
The TPS can go high resistance, but that would show 10K.
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
Good point. I should provide info making no assumptions as to who may read this thread in future. Good point
Yea 15 to 20 mins is what it took me and I removed the cowling :lol but we shall see if he can do it with or without removal of cowling.... I prefer to remove for ease of access and I have a Givi top box on so it involved a bit more, but only a few minutes.
He should first check the wiring through, to remove that potential from the problem domain as any TPS issue may be masked or affected by poor connections/wiring. Its a simple check. Then move to the TPS after we have confirmed good wiring/connections from TPS to ICU.
Just a minor point , an ECU = Electronic Control Unit as far as my electronic engineering MSc went - also referred to as ECM (Electronic Control Module) which are typically multifunctional and manage various logic circuits associated with automotive applications - new vehicles ECU are quite advanced and include all sorts of applications from tyre pressure to advanced driving modes. However this subject Fazer unit is - as I observe the simple wiring diagram - only preoccupied with the service of the ignition system so technically is an ICU (Ignition control unit) although yamaha termed it a Ignitor. Very minor point not changing the diagnostic for arieljt
EDIT: I'm off to my usual Sunday lunchtime pint and scampi in a minute so please carry on with unfazed who is familiar with TPS problems and more learned with a Fazer than moi !.
Dont forget to check the TPS resistance arieljt:
1. disconnect TPS harness from TPS unit
2. Measure resistance across the TPS terminal where the BLUE and BLACK.BLUE wires connect. this is the TPS terminals not the harness. should be 3.5 to 6.5 +/- 0.5 Kohms
3. Measure resistance across YELLOW and BLACK/BLUE TPS Terminals whilst moving the throttle. again , TPS terminals not the harness. should be zero to 5 +/- 1.5 Kohms
if either of these readings are out , then replace the TPS. If ok and wiring ok then the ICU needs replacing
Re: Tachometer jumps to 5K, couldn't find any info on error - arieljt - 03-08-14
(03-08-14, 10:32 AM)keratos link Wrote:OK.
access the ignitor unit. Its under the rear cowling so you will need to take this off. Take off grab bars. (4 allen bolts). Take off cowling note the screws under the cowling (metal and those plastic type things) underneath on both sides of the cowling. The ignitor unit has several plugs (harness) going into it; one harness has three wires of colour: BLUE, YELLOW, BLACK/BLUE . Remove that harness. Remove the TPS harness at the TPS sensor end (you've already done that if you have followed my instruction above). TPS Harness has the same colours. You now have two harnesses in your hand which are both ends of the TPS lead (one from TPS, one into Ignitor) Using the meter in CONTINUITY mode, check for continuity across all three wires. ie. touch BLUE on one harness end, touch BLUE on the other harness. "BEEP" ?? If three BEEPS (three colours) come back. If not then check your wiring for breaks/faults - which will be a nightmare as you will need to remove the TPS wiring from the bike so that you are holding these two harnesses on a workbench as one single end to end cable.
If you get three BEEPS, come back - wiring is good and the fault is likely to be the TPS unit which we can check simply and replace simply
As you own a fluke I'm presuming you are not a novice in electrics so am I ok to dispense with the electrical dumbing down - so as not to unduly patronise you and make this post much simpler :b
I see one unit with two harnesses coming into it, is it this one?:
![[Image: NeiwQOl.jpg]](http://imgur.com/NeiwQOl.jpg)
![[Image: z0nwfDm.jpg]](http://imgur.com/z0nwfDm.jpg)
EDIT: Could it be that this TPS is not original?:
![[Image: 3OtCH13.jpg]](http://imgur.com/3OtCH13.jpg)
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
That is it.
Yes is is a standard TPS, it is made by Mikuni
Do you have the security torx to open the bolts on the TPS.
The yamaha service manual has a section on the TPS, but needs to be searched using Throttle position system and is on pages 6-10 and 6-11. It also explains how to test it off and on the bike.
I would be surprised if the ECU or Ignitor as Yamaha call it is faulty since they are extremely reliable and rarely fail.
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
Just picking this up on my phone now...
That IS your ICU (although there should be more than two harnesses going into it. Never mind. And that IS your TPS. Good. Right... There are Three colours coming out of the harness from the TPS. Look for a harness going into the ICU with same three colours... Then run the tests I gave above
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
(03-08-14, 11:28 AM)keratos link Wrote:Just a minor point , an ECU = Electronic Control Unit as far as my electronic engineering MSc went - also referred to as ECM (Electronic Control Module) which are typically multifunctional and manage various logic circuits associated with automotive applications - new vehicles ECU are quite advanced and include all sorts of applications from tyre pressure to advanced driving modes. However this subject Fazer unit is - as I observe the simple wiring diagram - only preoccupied with the service of the ignition system so technically is an ICU (Ignition control unit) although yamaha termed it a Ignitor. Very minor point not changing the diagnostic for arieljt
Does the Acronym ECU also stands for Engine control Unit :lol
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
Possibly. Who knows. All I can deduce from the wiring diagram is that the subject unit I refer to as an ICU -ignition control unit-is only controlling ignition. Not the engine perse, not the other electronics, nothing else bar ignition
For example, an ECU on a given vehicle might control alarm,immobilser, instrumentation, RPM, braking, auto transmission, warnings, speed (limp mode) Etc etc so in that context... not limited to engine only, hence Electronic Control Unit / module.
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
I'm looking at the pics...
Could it be that your TPS color leads are as follows
BLUE = your green
YELLOW = YOUR YELLOW
BLACK/BLUE = your white red
Lke I said ... check at the TPS end and at ICU end. Three colours will be the same at both ends... Then run the tests I gave advice on
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
(03-08-14, 01:08 PM)unfazed link Wrote:.,.+1 for the correct term ...'Acronymn' rather than using 'abbreviation' ... Perfect grammar !
Does the Acronym ECU also stands for Engine control Unit :lol
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
so how is the testing going ??? is it a case of no news = good news
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
(03-08-14, 02:19 PM)keratos link Wrote:[quote author=unfazed link=topic=14224.msg160948#msg160948 date=1407067728].,.+1 for the correct term ...'Acronymn' rather than using 'abbreviation' ... Perfect grammar !
Does the Acronym ECU also stands for Engine control Unit :lol
[/quote]
What else would you expect from an ex college lecturer of Management Information Systems :rolleyes
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
geek! :book
un
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
Welcome to the club :lol
Re: Tachometer jumps to 5K, couldn't find any info on error - keratos - 03-08-14
(03-08-14, 10:52 PM)unfazed link Wrote:Welcome to the club :lolI inserted some smileys into the last post but they didnt appear so the "geek" hopefully wasnt taken out of context. smileys reinserted
so we have student and lecturer - although admittedly 'twas a long time since I left uni :deal
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 03-08-14
:lol
Re: Tachometer jumps to 5K, couldn't find any info on error - arieljt - 04-08-14
(03-08-14, 09:37 PM)keratos link Wrote:so how is the testing going ??? is it a case of no news = good news
I wish :rolleyes and no, I wouldn't disappear like that
I just tested the continuity and the cables are good. Even if i move them around there is no problem with them.
Now, for the resistance, I didn't understand where do I test it, can someone please clarify?
btw, you guys rock! thank you all for helping
Re: Tachometer jumps to 5K, couldn't find any info on error - unfazed - 04-08-14
Have you downloaded the service manual from here? Yamaha FZS600 1998 Service Manual 5dm1-ae1
Go to page 6-10 and follow the tests with the TPS on the bike.
Let us know the results