TPS??? - Discuss TPS??? on CBRXX, the ultimate on-line community for Honda motorcyclists. Read it in Body / Paint / Electrical / Lights. (Discussion of Honda CBR 1100 XX Super Blackbird Bodywork, Seats, Seat Cowls, Paint, Windscreens, Electrical System, and Lights.)

Falcon23 · 05-05-2008, 1:17 AM

Does the XX have a throttle position sensor of any sort? Thanks!

Leftlaner · 05-05-2008, 2:19 AM

Not if you have carbs..! Maybe on the FI models though..?

Banshee · 05-05-2008, 7:40 AM

Sorry Leftlaner, that is not correct.

On the carbed bikes, the TPS is on the right hand side as you look from the back towards the front of the bike. (Just checked my '98 OEM manual.)

Falcon23 · 05-05-2008, 9:50 AM

Quote:

Originally Posted by Banshee

Sorry Leftlaner, that is not correct.

On the carbed bikes, the TPS is on the right hand side as you look from the back towards the front of the bike. (Just checked my '98 OEM manual.)

What section is it listed under in the manual? Where exactly is it located? What does it look like? Thanks.

HANKSXXX · 05-05-2008, 10:29 AM

It's a switch mounted to the end of the carbs. Look for wires going to the carbs and you found it....Left side on mine near #1 ???
Hank

Leftlaner · 05-05-2008, 10:30 AM

Banshee: I stand corrected, sorry!

Why on earth does a carbed machine need a TPS for? It couldn't be the timing, as this is mechanic (not electronic, right?), it couldn't be the air/fuel ratio (carbs take care of this).. So what IS it for??

Falcon23 · 05-05-2008, 2:17 PM

Right on, thanks for the info guys!

HANKSXXX · 05-05-2008, 5:40 PM

TPS changes timing relative to throttle opening...Hank

Banshee · 05-05-2008, 5:46 PM

Chapter 5-6 in the manual for my '98.

Strange, in the drawing it makes it look like it is on the right, oh well, that's Honda drawings for you!

Yes, just a roundish black thing with wires.

Leftlaner · 05-06-2008, 12:07 AM

Wow, I didn't know my 'bird was THAT refined..! I've pulled out the carbs before, and can't remember any electrical wires running to the carbs. Only choke and throttle wire. I'll definately have a closer look at this the next time my air box is out of the way.. Cheers guys, and thanks for enlightening me!

Evilbugster · 05-27-2009, 7:53 PM

Hi

Can anyone tell me what wires are what, in the throttle sensor on a carb engine. I presume there is a negative, a input voltage and a output signal voltage and the electrical diagram agrees as it says you have:

yelow/blue
blue/green
yellow/red

I have read the manual and it says that the inspection adaptor has the following wires but not what they attach to above.
green
red
white

Cheers

uis048 · 05-28-2009, 10:45 AM

TPS is a form of 'volume control' just like on an old radio. As you open the throttle this turns the volume up. This varies a voltage back to the ECU depending on throttle position. The ECU then varies the amount of advance / retard it gives to the sparks with reference to the RPM sensor on the crank. The two readings allow the ECU to give a 'better' spark firing time depending on engine load and throttle opening.
My old EXUP had one that always failed, never seemed to make that much difference to performance.

Evilbugster · 05-28-2009, 11:22 AM

Thank you for the info on how it works, I guessed it was something like that.
What I am looking for is what wire is the negative, the input and the out put.
I have contacted main dealers and even they can't tell me. They do however want to sell me the adaptor for £28 plus vat or the new unit for £150 plus vat, rip off merhcants I think.

If I use the voltage meter and only put a small amount through e.g. 1 volt, could i track down the wires or would this damage it?

bullet · 05-28-2009, 12:01 PM

Yes the carbed models feature a tps...and the ignition is digital

For the Fi models i think that the tps is unfortunately part of the whole intake system...

Evilbugster · 05-28-2009, 12:43 PM

Thank you

What I really need to know is what colour wire is:
The earth
The input
The output

I even know the wire colours,
yelow/blue
blue/green
yellow/red

I just need to know what colour relates to the function e.g.
The earth wire is Blue/green

bullet · 05-28-2009, 12:45 PM

Download the service manual from the approriate section of the forum...i'm sure it has all the related info....

smurf211 · 05-28-2009, 1:18 PM

Here's a shot of the carb version. Item 15. // sm

JohnS · 05-28-2009, 6:50 PM

Use your multimeter to identify the wires. Using the resistance scale with one probe on earth, test each wire with the other probe. The wire that has zero resistance is the earth wire.

Go to the voltage scale on the meter with the ignition on and one probe connected to earth, test each wire with the other probe. The wire with a voltage present will be power in. Power in may not be 12 volts and is likely to be 5 volts.

The remaining wire will be power out to the control unit.

These tests should be done with the harness unplugged from the TPS.

Once the wires are identified, plug the TPS back in and measure the voltage with one probe on the output wire and one on a good earth and the ignition on.

You should get a reading around .4 of volt, then smoothly open the throttle and the reading should rise to 5 volts on full throttle. Look for any areas where the voltage jumps up or down as the throttle is moved as these will indicate a faulty TPS.

The voltages I have quoted are what most TPS units run at and are not specific to the Bird. You should look up the real figure in your manual.

JohnS

Evilbugster · 05-28-2009, 7:12 PM

Brillant, I will give that ago

Thank you

smurf211 · 05-28-2009, 8:32 PM

Get a Haynes manual, they have color schematics per year. Here are some shots of my 2000 taken while I was working on the FPR which is co located. hth // smurf

DeathWish01 · 05-28-2009, 9:49 PM

didn't you get the memo about the TPS reports? geesh....

smurf211 · 05-29-2009, 5:12 AM

Quote:

Originally Posted by DeathWish01

didn't you get the memo about the TPS reports? geesh....

Uh, yeah..... Mike, ....yeah ... we are going to need you to come in this Saturday to work on those reports and uh, yeah... better make that Sunday too. Yeah.......

uis048 · 05-29-2009, 6:53 AM

Just about to write up the voltages but I could'nt have put it better than JohnS.

Just as a matter of interest, on the Yamaha, you set the correct position of the TPS with the rev counter. There was a sequence of unplugging and plugging the TPS until the rev counter was enabled. Then when you altered the position of the TPS the rev counter needle would swing up and down the scale. It was set correctly when the needle read 5000 rpm, does anyone know if the 'birds TPS is set up the same way?

Cheers

DeathWish01 · 05-29-2009, 6:28 PM

Quote:

Originally Posted by smurf211

Uh, yeah..... Mike, ....yeah ... we are going to need you to come in this Saturday to work on those reports and uh, yeah... better make that Sunday too. Yeah.......

dammit how did i know this would backfire on me......

im gonna have to say no...
"f*ck you.... f*ck you... f*ck you... your cool, im outta here"

05-05-2008, 2:19 AM	#2
Leftlaner Join Date: Oct 30 2006 Location: Norway Posts: 520	Re: TPS??? Not if you have carbs..! Maybe on the FI models though..? __________________ To do is to be - Socrates To be is to do - Jean-Paul Sartre Do-be-do-be-do - Frank Sinatra

05-05-2008, 7:40 AM	#3
Banshee Join Date: Jun 21 2007 Location: Springwood, West of Hell (Sydney), Australia Age: 43 Posts: 1,165	Re: TPS??? Sorry Leftlaner, that is not correct. On the carbed bikes, the TPS is on the right hand side as you look from the back towards the front of the bike. (Just checked my '98 OEM manual.)

05-05-2008, 10:29 AM	#5
HANKSXXX Join Date: Dec 10 2006 Location: Augusta NJ Posts: 592	Re: TPS??? It's a switch mounted to the end of the carbs. Look for wires going to the carbs and you found it....Left side on mine near #1 ??? Hank

05-05-2008, 10:30 AM	#6
Leftlaner Join Date: Oct 30 2006 Location: Norway Posts: 520	Re: TPS??? Banshee: I stand corrected, sorry! Why on earth does a carbed machine need a TPS for? It couldn't be the timing, as this is mechanic (not electronic, right?), it couldn't be the air/fuel ratio (carbs take care of this).. So what IS it for?? __________________ To do is to be - Socrates To be is to do - Jean-Paul Sartre Do-be-do-be-do - Frank Sinatra

05-05-2008, 2:17 PM	#7
Falcon23 Fastest XX in AZ!!! Join Date: Jun 08 2007 Location: Glendale, AZ Age: 25 Posts: 343	Re: TPS??? Right on, thanks for the info guys! __________________ "The thrill of a good price fades far sooner than the pain of a poor product" 98 XX: Titanium Force Full Ti Exhaust (best exhaust ever!!!), Factory Pro Jet Kit, K&N Drop-in, Dynatek DRL-400 2 Step Rev Limiter, AFAM 16/46 Sprockets, Michelin Pilot Powers-120/190

05-05-2008, 5:40 PM	#8
HANKSXXX Join Date: Dec 10 2006 Location: Augusta NJ Posts: 592	Re: TPS??? TPS changes timing relative to throttle opening...Hank

05-05-2008, 5:46 PM	#9
Banshee Join Date: Jun 21 2007 Location: Springwood, West of Hell (Sydney), Australia Age: 43 Posts: 1,165	Re: TPS??? Chapter 5-6 in the manual for my '98. Strange, in the drawing it makes it look like it is on the right, oh well, that's Honda drawings for you! Yes, just a roundish black thing with wires.

05-06-2008, 12:07 AM	#10
Leftlaner Join Date: Oct 30 2006 Location: Norway Posts: 520	Re: TPS??? Wow, I didn't know my 'bird was THAT refined..! I've pulled out the carbs before, and can't remember any electrical wires running to the carbs. Only choke and throttle wire. I'll definately have a closer look at this the next time my air box is out of the way.. Cheers guys, and thanks for enlightening me! __________________ To do is to be - Socrates To be is to do - Jean-Paul Sartre Do-be-do-be-do - Frank Sinatra

05-27-2009, 7:53 PM	#11
Evilbugster Join Date: May 27 2009 Location: essex Posts: 11	Re: TPS??? Hi Can anyone tell me what wires are what, in the throttle sensor on a carb engine. I presume there is a negative, a input voltage and a output signal voltage and the electrical diagram agrees as it says you have: yelow/blue blue/green yellow/red I have read the manual and it says that the inspection adaptor has the following wires but not what they attach to above. green red white Cheers

05-28-2009, 10:45 AM	#12
uis048 Join Date: Mar 12 2009 Location: Manchester UK Age: 62 Posts: 58	Re: TPS??? TPS is a form of 'volume control' just like on an old radio. As you open the throttle this turns the volume up. This varies a voltage back to the ECU depending on throttle position. The ECU then varies the amount of advance / retard it gives to the sparks with reference to the RPM sensor on the crank. The two readings allow the ECU to give a 'better' spark firing time depending on engine load and throttle opening. My old EXUP had one that always failed, never seemed to make that much difference to performance.

05-28-2009, 11:22 AM	#13
Evilbugster Join Date: May 27 2009 Location: essex Posts: 11	Re: TPS??? Thank you for the info on how it works, I guessed it was something like that. What I am looking for is what wire is the negative, the input and the out put. I have contacted main dealers and even they can't tell me. They do however want to sell me the adaptor for £28 plus vat or the new unit for £150 plus vat, rip off merhcants I think. If I use the voltage meter and only put a small amount through e.g. 1 volt, could i track down the wires or would this damage it?

05-28-2009, 12:01 PM	#14
bullet Join Date: Jun 12 2007 Location: GREECE-ATHENS Age: 39 Posts: 987	Re: TPS??? Yes the carbed models feature a tps...and the ignition is digital For the Fi models i think that the tps is unfortunately part of the whole intake system... __________________ Nektarios a.k.a Bullet http://www.facebook.com/home.php?#!/...35&ref=profile http://s570.photobucket.com/home/neklek/allalbums

05-28-2009, 12:43 PM	#15
Evilbugster Join Date: May 27 2009 Location: essex Posts: 11	Re: TPS??? Thank you What I really need to know is what colour wire is: The earth The input The output I even know the wire colours, yelow/blue blue/green yellow/red I just need to know what colour relates to the function e.g. The earth wire is Blue/green

05-28-2009, 12:45 PM	#16
bullet Join Date: Jun 12 2007 Location: GREECE-ATHENS Age: 39 Posts: 987	Re: TPS??? Download the service manual from the approriate section of the forum...i'm sure it has all the related info.... __________________ Nektarios a.k.a Bullet http://www.facebook.com/home.php?#!/...35&ref=profile http://s570.photobucket.com/home/neklek/allalbums

05-28-2009, 6:50 PM	#18
JohnS Join Date: Mar 06 2007 Location: Brisbane Aust Posts: 147	Re: TPS??? Use your multimeter to identify the wires. Using the resistance scale with one probe on earth, test each wire with the other probe. The wire that has zero resistance is the earth wire. Go to the voltage scale on the meter with the ignition on and one probe connected to earth, test each wire with the other probe. The wire with a voltage present will be power in. Power in may not be 12 volts and is likely to be 5 volts. The remaining wire will be power out to the control unit. These tests should be done with the harness unplugged from the TPS. Once the wires are identified, plug the TPS back in and measure the voltage with one probe on the output wire and one on a good earth and the ignition on. You should get a reading around .4 of volt, then smoothly open the throttle and the reading should rise to 5 volts on full throttle. Look for any areas where the voltage jumps up or down as the throttle is moved as these will indicate a faulty TPS. The voltages I have quoted are what most TPS units run at and are not specific to the Bird. You should look up the real figure in your manual. JohnS

05-28-2009, 7:12 PM	#19
Evilbugster Join Date: May 27 2009 Location: essex Posts: 11	Re: TPS??? Brillant, I will give that ago Thank you

05-29-2009, 6:53 AM	#23
uis048 Join Date: Mar 12 2009 Location: Manchester UK Age: 62 Posts: 58	Re: TPS??? Just about to write up the voltages but I could'nt have put it better than JohnS. Just as a matter of interest, on the Yamaha, you set the correct position of the TPS with the rev counter. There was a sequence of unplugging and plugging the TPS until the rev counter was enabled. Then when you altered the position of the TPS the rev counter needle would swing up and down the scale. It was set correctly when the needle read 5000 rpm, does anyone know if the 'birds TPS is set up the same way? Cheers