Honda Motorcycles - FireBlades.org banner

1 - 20 of 60 Posts

·
Registered
Joined
·
34 Posts
Discussion Starter #1
Hi all I'm in need of some help as my blade dead today .

Its a cbr 900 rrw as i was riding the bike cut out an died , when i tried to restart it i notice i had lost the milage display and temperature display and the neutral and oil light just went out when the starter button was pressed.

A friend came to the rescuse with a new battery we fitted it on the side of the road and the bike fired up , i rode it back to the garage but the milage display , temp display speedo and tacho were not working , when we got to our garage we tested the voltage of the battery while running and it was peaking up to 17v while revving the bike.

We changed the rectifer while my battery was on charge , sorted that problem back to 13.5-14v .

We went to refit my battery but it had been cooked it was showing 12.80v but failed to even turn the bike over.

We then refitted the new battery , and the bike just turned over now it wont start , we have no spark , i then tried my ICM on his cbr900rrw (same ICM code) it fires up fine,
We have tried his ignition on mine as i have no power going to the pink ICM wire , nothing , we have tried his starter solenoid still nothing we have tried to find any damaged wires/ bad conections but nothing.

We have continuity from the green ICM wire to the battery and a battery voltage reading from the black many hours of testing wires we are now lost and hoping you guys can help?

Thanks in advance.
 

·
President: Team Full Chat
Joined
·
8,118 Posts
Where on the pink wire did you check for voltage? You know it needs to show about 9vdc in order for the ECU to work. The ignition switch on your buddies bike should have solved that problem. Possibly one of the clutch/sidestand safety's got fried? Have you checked your fuse box for melted connections? Put your buddies clock asembly on yours and see if it lights up, etc.
 

·
Registered
Joined
·
34 Posts
Discussion Starter #3
Iv check the pink wire at the ICM and at the ignition connection plug ,
I should of said sorry the bike is prepared as a race bike so i have no lights , no clutch switch , no side stand my ICM runs my friends bike with all the dash working
 

·
Premium Member
Joined
·
454 Posts
Have you checked you are getting 12v at the coils (black/white wire) with the ignition on? If not, check that fuse B and the kill switch are ok.
 

·
Registered
Joined
·
34 Posts
Discussion Starter #5
Yeah i have power at the black/whites at the coil with ignition on also power coming back through the blue/yellow 2 aswell
 

·
Registered
Joined
·
34 Posts
Discussion Starter #6
All fuses checked good , Iv even put all new fuses in just to be double 100%sure lol.
The only place that doesn't have power that should (that I know of) is the pink from the ignition , I went and bought a 9v battery this morning and conneted the positive of that to the pink an the neg to the bike battery it gave me 9v coming in to the ICM but still no spark
 

·
President: Team Full Chat
Joined
·
8,118 Posts
Ok so things we know:

Sparked before battery got fried

Reg/rec crapped out

Track bike harness

Dash/clocks lost power

Power at coils

Good ECU

No power at pink, which means bad connection at ignition switch. I'm prepping my RRX right now as a track bike, so I have basically the same set up as you.

There is a small red wire pigtailed off the 12vdc constant red that powers the dash. I'm using a toggle switch for my ignition, so I had to wire in the Zener diode, etc. The 2 Red's here I just took right out of the ignition connector and connected to the "off" side of the switch. You can see it here:



And it runs into the clocks via the clock harness seen at the top of this picture:





I'm guessing something is toast in your harness in this area. Can you post pics of your set up?

How did you confirm there is no spark?
 

·
Premium Member
Joined
·
454 Posts
I guess it could be the pulse generator that's packed up, though that's unlikely to have been caused by a failed reg/rect. That said it's probably worth unplugging the ignition amplifier and sticking a meter across the pulse generator pins on the loom side to measure resistance. You should see around 400 ohms IIRC, and you should see no continuity (infinite resistance) from either of the pulse generator wires to ground.

More likely you have disturbed a bad/corroded connection (possibly within the loom itself) whilst replacing the battery and r/r.

Have you measured the voltage on the pink wore at the ignition switch connector (or on the back of the ignition switch itself) rather than the ignition amplifier? I don't quite understand how there could be 0 volts here if there is battery voltage on the red wire, and if the ignition switch works on another bike.
 

·
President: Team Full Chat
Joined
·
8,118 Posts
I guess it could be the pulse generator that's packed up, though that's unlikely to have been caused by a failed reg/rect. That said it's probably worth unplugging the ignition amplifier and sticking a meter across the pulse generator pins on the loom side to measure resistance. You should see around 400 ohms IIRC, and you should see no continuity (infinite resistance) from either of the pulse generator wires to ground.

More likely you have disturbed a bad/corroded connection (possibly within the loom itself) whilst replacing the battery and r/r.

Have you measured the voltage on the pink wore at the ignition switch connector (or on the back of the ignition switch itself) rather than the ignition amplifier? I don't quite understand how there could be 0 volts here if there is battery voltage on the red wire, and if the ignition switch works on another bike.
I was thinking that too, hard to have power at the coils but no spark, eh? He said when he pushed the start button the lights would go out on the dash. Seems something is messed up, up front in the harness. Kill switch, start button, no pink voltage, no dash lights.........
 

·
Registered
Joined
·
34 Posts
Discussion Starter #10
Im just in my way back from my mates with a pluse gen now so I'll get some pics up soon as i get back really hope imthis is the issue , what reading should i get from the pluse gen is it 0.7v ?
 

·
Registered
Joined
·
34 Posts
Discussion Starter #11
This is so confuseing i have done all the haynes manual tests on the ignition for continuity an all is as should be i have battery voltage in all ingnition wire yet nothing in the pink ??
 

·
President: Team Full Chat
Joined
·
8,118 Posts
Im just in my way back from my mates with a pluse gen now so I'll get some pics up soon as i get back really hope imthis is the issue , what reading should i get from the pluse gen is it 0.7v ?
The test for the ignition coil is peak voltage only, used with a special adapter, which yes, should be .7v minimum.

But still, how did you come to determine you have no spark?
 

·
Registered
Joined
·
34 Posts
Discussion Starter #15
Yeah oe ignition switch , it wouldnt start so i pulled the leads off an put brand new plugs in the leads an earthed them on to engine even put a jump lead from neg on battery to hold the new plugs an still no spark , I can figure out how to put pics up I only have my phone with me an limited signal . Really appreciate the help tho guys ��������
 

·
President: Team Full Chat
Joined
·
8,118 Posts
The bottom of the inside of the ignition switch has the Zener diode in it, probably should have worked with your buddies swap, but bcause it didn't would lead me to believe that something is fried in the area of where your ignition switch is. If you're using you phone for pics you can only upload one at a time and you have to click the "paper lip" attachment and do it that way. The pink wire gets its voltage from the switched side of the ignition. So it only has voltage once the key is "on". It should be connected to the "larger" red/black wire going into fuse box, as well as the blue/red which powers the cooling fan. Make sure that is all proper.
 

·
President: Team Full Chat
Joined
·
8,118 Posts
My "diagnose over Skype" fees are borderline illegal, I would hate to see you pay so much and not get your problem solved:D

I don't skype, but my kids do......I imagine that would be a bit easier, but I'm not that cool. What's a Facebook phone call out of curiosity?
 
1 - 20 of 60 Posts
Top