BARF - Bay Area Riders Forum

Go Back   BARF - Bay Area Riders Forum > Moto > The Garage


Notices

Reply
 
Thread Tools Display Modes
Old 01-30-2021, 01:52 PM   #31
ST Guy
Veteran
 
ST Guy's Avatar
 

Join Date: Nov 2006
Location: South Bay
Motorcycles: Honda ST1100 ABS (tweaked here and there)
Name:
Put the original ECU back in temporarily and see if the problem goes away? Should be quick to do.
__________________
It's not the answer that enlightens, but the question. - Eugene Ionesco

Let us not pray to be sheltered from dangers but to be fearless when facing them. - Rabindranath Tagore

A mind all logic is like a knife all blade. It makes the hand bleed that uses it. - Rabindranath Tagore
ST Guy is online now   Reply With Quote
Old 01-30-2021, 02:14 PM   #32
Gravisman
Aspiring Racer
 
Gravisman's Avatar
 
Contributor

Join Date: Aug 2017
Location: San Francisco
Motorcycles: ZX-6R RSV4 Panigale 899 Ninja 300 FZ-07R
Name: Gravisman
Quote:
Originally Posted by ST Guy View Post
Put the original ECU back in temporarily and see if the problem goes away? Should be quick to do.
I bought the bike with the aftermarket ecu, so donít have the original. I may end up needing to buy an original to test, because the aftermarket part is $750
__________________
Random Racing | AFM 850

Motorcycles turn by harnessing the pure power of awesome directly from the soul of the multiverse. Motorcycles make physics their bitch.
Gravisman is offline   Reply With Quote
Old 01-30-2021, 09:58 PM   #33
ST Guy
Veteran
 
ST Guy's Avatar
 

Join Date: Nov 2006
Location: South Bay
Motorcycles: Honda ST1100 ABS (tweaked here and there)
Name:
Before You try a stock ECU, call the aftermarket maker, explain your problem, and see if they have a solution.
__________________
It's not the answer that enlightens, but the question. - Eugene Ionesco

Let us not pray to be sheltered from dangers but to be fearless when facing them. - Rabindranath Tagore

A mind all logic is like a knife all blade. It makes the hand bleed that uses it. - Rabindranath Tagore
ST Guy is online now   Reply With Quote
Old 01-31-2021, 05:57 PM   #34
Rob750
Rookie
 
AMA #: 973663

Join Date: Dec 2012
Location: San Francisco
Motorcycles: Aprilia Shiver, Triumph New Bonneville
Name: Rob
C is not indicating capacitors, C means sub harness ďCĒ.

Any chance the battery was connected backwards, even for a split second?
Rob750 is offline   Reply With Quote
Old 01-31-2021, 06:09 PM   #35
DannoXYZ
Veteran
 
DannoXYZ's Avatar
 
Barf Roadside Angel

Join Date: Apr 2006
Location: East Bay
Motorcycles: CB125T EX250E Ninja250R racer CBR250R-MC19 CBR250RR-MC22 NSR250R-MC21 VF500F CBR600RR VFR750
Name: Danno
Quote:
Originally Posted by Gravisman View Post
I was trying to do some electrical and pretending to know what I was doing when I accidentally shorted a 12v wire and blew my FZ-07's ignition fuse.
Ok back to basics.

- What is this 12v wire you shorted?
- what colour?
- what does it connect to on each end?

That would help with examining diagram to see what circuits are affected by that wire.
DannoXYZ is offline   Reply With Quote
Old 01-31-2021, 07:39 PM   #36
Gravisman
Aspiring Racer
 
Gravisman's Avatar
 
Contributor

Join Date: Aug 2017
Location: San Francisco
Motorcycles: ZX-6R RSV4 Panigale 899 Ninja 300 FZ-07R
Name: Gravisman
Quote:
Originally Posted by DannoXYZ View Post
Ok back to basics.

- What is this 12v wire you shorted?
- what colour?
- what does it connect to on each end?

That would help with examining diagram to see what circuits are affected by that wire.
The 12v wire in question does not appear on the schematic - it was part of a CAN accessory cable specific to my aftermarket aRacer ECU it connects directly to the ECU
__________________
Random Racing | AFM 850

Motorcycles turn by harnessing the pure power of awesome directly from the soul of the multiverse. Motorcycles make physics their bitch.
Gravisman is offline   Reply With Quote
Old 01-31-2021, 07:41 PM   #37
Gravisman
Aspiring Racer
 
Gravisman's Avatar
 
Contributor

Join Date: Aug 2017
Location: San Francisco
Motorcycles: ZX-6R RSV4 Panigale 899 Ninja 300 FZ-07R
Name: Gravisman
Quote:
Originally Posted by Rob750 View Post
C is not indicating capacitors, C means sub harness ďCĒ.

Any chance the battery was connected backwards, even for a split second?
The battery was definitely never connected backwards, but itís possible the 12v wire on the CAN cable touched another wire. Iím not totally sure if touching another wire or the frame caused the incident.
__________________
Random Racing | AFM 850

Motorcycles turn by harnessing the pure power of awesome directly from the soul of the multiverse. Motorcycles make physics their bitch.
Gravisman is offline   Reply With Quote
Old 01-31-2021, 08:58 PM   #38
Demoni
Veteran
 
Demoni's Avatar
 

Join Date: Apr 2005
Location: Pacifica
Motorcycles: 99' Ducati 900ss, 04' Aprilia RS50, 97' BMW F650, 00' BMW R1150GS, 05 CRF250R
Name: Chris
Quote:
Originally Posted by Gravisman View Post
The 12v wire in question does not appear on the schematic - it was part of a CAN accessory cable specific to my aftermarket aRacer ECU it connects directly to the ECU
So generally CAN bus does not operate at 12v. CANH runs ~ 3.5V, CANL ~ 1.5V. I would bet the wire in the cable is a seperate power feed for something related to the aftermarket ECU.

What did you short the 12v wire to? Ground or another wire? You might want to check any relays. If one is outputting power with the key in the off position: trigger wire might be causing the circuit to stay open, the relay contacts might be sticking or the wire is receiving power from somewhere else in the harness.

Here is a good resource for diode testing Diode test
Demoni is offline   Reply With Quote
Old 01-31-2021, 08:59 PM   #39
Gravisman
Aspiring Racer
 
Gravisman's Avatar
 
Contributor

Join Date: Aug 2017
Location: San Francisco
Motorcycles: ZX-6R RSV4 Panigale 899 Ninja 300 FZ-07R
Name: Gravisman
Quote:
Originally Posted by Rob750 View Post
C is not indicating capacitors, C means sub harness ďCĒ.
Thank you for this clarification! Any chance you could explain the letter indicators put on all the pins/wires? I confess I havenít been able to fully decode them. They kinda seem like wire colors, but some donít make sense - like what color would Gy/R be? It also doesnít make sense to me why the pin diagram for the ECU connector has one pin labeled R/B but then when examining the lines to there are two labeled R/B - one coming from the EFI fuse, and another going to a fuel injector. How would I know which of these wires actually matches to the pin on the connector?
__________________
Random Racing | AFM 850

Motorcycles turn by harnessing the pure power of awesome directly from the soul of the multiverse. Motorcycles make physics their bitch.
Gravisman is offline   Reply With Quote
Old 01-31-2021, 09:55 PM   #40
Gravisman
Aspiring Racer
 
Gravisman's Avatar
 
Contributor

Join Date: Aug 2017
Location: San Francisco
Motorcycles: ZX-6R RSV4 Panigale 899 Ninja 300 FZ-07R
Name: Gravisman
Quote:
Originally Posted by Demoni View Post
So generally CAN bus does not operate at 12v. CANH runs ~ 3.5V, CANL ~ 1.5V. I would bet the wire in the cable is a seperate power feed for something related to the aftermarket ECU.

What did you short the 12v wire to? Ground or another wire? You might want to check any relays. If one is outputting power with the key in the off position: trigger wire might be causing the circuit to stay open, the relay contacts might be sticking or the wire is receiving power from somewhere else in the harness.

Here is a good resource for diode testing Diode test
I understand that CAN does not run at 12v but there is a 12v line on the cable which accessories can use for power (including the lap timer I was wiring in).

Iím not sure exactly what the short was - it occurred in a moment of distraction and I may have touched the 12v wire to another wire or to the frame.

I have tested the relay box and gotten somewhat puzzling results. All the tests come back opposite what the specifications say they should - that is positive and negative leads are swapped for continuity. Itís possible thereís a problem there, but since the bike actually seems to function fine when turned on, I think itís more likely that thereís some error in my testing - if the whole relay box were broken I doubt the bike would run. Relay boxes are cheap so I ordered a new one to test just in case there is a real issue there. Iím starting to think about doing continuity tests on my wiring harness, but not quite sure what tests I should do (see some of my confusion about pin labeling in my previous post).
__________________
Random Racing | AFM 850

Motorcycles turn by harnessing the pure power of awesome directly from the soul of the multiverse. Motorcycles make physics their bitch.
Gravisman is offline   Reply With Quote
Old 02-01-2021, 08:08 AM   #41
DannoXYZ
Veteran
 
DannoXYZ's Avatar
 
Barf Roadside Angel

Join Date: Apr 2006
Location: East Bay
Motorcycles: CB125T EX250E Ninja250R racer CBR250R-MC19 CBR250RR-MC22 NSR250R-MC21 VF500F CBR600RR VFR750
Name: Danno
Quote:
Originally Posted by Gravisman View Post
Thank you for this clarification! Any chance you could explain the letter indicators put on all the pins/wires? I confess I havenít been able to fully decode them. They kinda seem like wire colors, but some donít make sense - like what color would Gy/R be? It also doesnít make sense to me why the pin diagram for the ECU connector has one pin labeled R/B but then when examining the lines to there are two labeled R/B - one coming from the EFI fuse, and another going to a fuel injector. How would I know which of these wires actually matches to the pin on the connector?
Location matters. Look at diagram and trace R/B from fuse. Probably R/B starts at fuse and branches off (T-split) to feed two different devices.

Similarly, trace wires on bike to follow what's draw on schematic.
DannoXYZ is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 09:36 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.