Hi all,
PV has stopped working on my 3MA, since rebuild over 1yr ago it has been functioning fine.
PV cycles when I turn the ignition on, therefore the PV motor it functioning.
I understand the CDI picks up a tacho signal and then relays this signal to the motor to operate when required.
TPS is functioning and giving me a reading from 4V closed throttle down to about 1.6V fully open throttle, I'm seeing conflicting information on how to check the TPS is working correctly also.. Can this be confirmed how to test the TPS with a meter?
Is there a method with a multi meter to check if this signal is going to the CDI and if a signal is coming out of the CDI to the motor?
Basically I'm after what steps are required to check the signal from tacho-CDI-PV motor or if this is even possible with basic electric knowledge and a multi meter.
Or any other possible reasons for the PV to stop functioning??
Thanks.
Quote from: TZR2503MA on July 17, 2018, 01:41:20 PM
I understand the CDI picks up a tacho signal and then relays this signal to the motor to operate when required.
Is there a method with a multi meter to check if this signal is going to the CDI and if a signal is coming out of the CDI to the motor?
I'm not a pro of 3MA but usually the CDI controls the YPVS motor (no extra black box as on the 1KT or 2MA). So if the valves do their cleaning cycle when ignition is set to ON the YPVS motor is working fine and the electronics which drive the motor too.
On the motor, you should have 5 wires :
- multiway connector with 4 wire -> 5V, GND 0V, 2 wires for the electric motor
- single bullet connector with the feedback signal -> position of the motor.
You could test with a meter :
- location of 5V (one probe on wire the other on frame (or batterie -) => meter shows 5V)
- location of GND (one probe on wire the other on frame => meter shows 0V)
- Testing engine wires:
- a probe on each wires
- meter should show +(-)12V on half the cleaning cycle and -(+)12V during the second half (or the other way)
Maybe some thing is wrong on the PCB of the CDI so the microcontroller does not send information based on engine rpm.
The box is easy to open as the CDI is not clued.
See CDI threads
- TZR250 2XT CDI same as 3MA http://pure2strokespirit.net/forums/index.php?topic=2786.0 (http://pure2strokespirit.net/forums/index.php?topic=2786.0)
- Long and technical http://pure2strokespirit.net/forums/index.php?topic=1226.390 (http://pure2strokespirit.net/forums/index.php?topic=1226.390)
Many thanks for the comprehensive reply :)
I've checked the 4 X wires to the motor, all are as you have described, 1 x 5V, one ground, one 12V+ & one 12V- when motor cycles.
The orange signal wire, I have opened the CDI box connected the multi meter to the orange terminal and the other meter connecter to the rear of the taco, this will give me continuity so the connection is OK & I've checked the bullet connectors on the orange wire, all which look okay.
The CDI must be gone bad as you have mentioned..
The box was never before opened as some of the glue was holding the circuit board in place, I have to Dremel the lid to remove the board.
Is the next step to try another CDI?
Or is there anything else to check?
All components look very good inside the CDI, all solder joints look good etc etc..
I've no idea of what to check... Maybe Louis who has a good experience on 3MA could have one.
Some extra questions :
- bike engine is running ? => IC is driving correctly the condenser discharge
- bike tachometer is running ? => orange wire is sending the rpm information
As I've no 3MA CDI at home I can not look at track routing to see if an electronic component could have failed.
Maybe Louis can look at.
Quote from: tzr-v4 on July 18, 2018, 08:51:44 PM
I've no idea of what to check... Maybe Louis who has a good experience on 3MA could have one.
Some extra questions :
- bike engine is running ? => IC is driving correctly the condenser discharge
- bike tachometer is running ? => orange wire is sending the rpm information
As I've no 3MA CDI at home I can not look at track routing to see if an electronic component could have failed.
Maybe Louis can look at.
When you say condenser charge, are you referring to the coils working? If so, yes spark is good.
Tachometer is also working OK.
Looks like I'm after a CDI.
Coastline in Preston have one for sale for £80.. but it's a slightly different part number to mine.
Part for sale : 3MA-01 071000-0130
Mine: 3MA-10 071000-0170
I need to figure out if this will work!
Hmmmm. Is yours a 3ma1 engine and associated electrics or not? As a 3ma-10 cdi box is for the later 3ma3 and 3ma5. If yours does have the later electrics then there will be another cdi box up near the clocks that says 3ma-11 or similar.
Dan
Quote from: maccas on July 19, 2018, 02:23:26 PM
Hmmmm. Is yours a 3ma1 engine and associated electrics or not? As a 3ma-10 cdi box is for the later 3ma3 and 3ma5. If yours does have the later electrics then there will be another cdi box up near the clocks that says 3ma-11 or similar.
Dan
Hi Dan,
I believe I have a 3MA1 engine.. No extra electronics box near the clocks..
I'm confused!
Quote from: TZR2503MA on July 19, 2018, 08:21:05 AM
When you say condenser charge, are you referring to the coils working? If so, yes spark is good.
Tachometer is also working OK.
The CDI IC (Integrated Circuit) is driving the discharge of the condenser so the HT coil produces the spark.
The same signal is routed to the Tachometer.
So if both are working this part of the CDI is working as it should.
Still not much luck with a functioning PV whilst running.
Here is a video of the PV cycling when I turn on the ignition, does this look OK?
https://youtu.be/XeznxsARndw (https://youtu.be/XeznxsARndw)
The PV cycles, then always does two same moves as per video.
I managed to source another CDI from Vinny (Thanks) but I'm getting the same issues, the PV does not operate riding the bike.
Any other thing I should be checking?
Sounds like you have the cables to tight. (or the powervalve is clamping it self in the end)
It struggles to get to its end point, and stops because it does not get there.
Then the ypvs automatically goes back (the small steps I can't explain)
Try to undo the ypvs cables, and see how the servo works then
Hi Louis,
I have tensioned and tried with the cables with lots of free play, I still get two small moves at the end (this has happened since I rebuilt the engine).
Both PV's are free to move buy hand if I remove the pulley cover..
I think it's more electrical issue than mechanical as it just stopped working one day..
Ok, turn bij hand is good.
I can only judge on the movie you post.
It sounds like the servo having trouble in the end (the sound it makes)
Perhaps there is a problem with the servo internally.
Normally it goes the same speed Open and close and the sound should be close to each other (open en close)
have you tried a other servo?
Quote from: Louis on August 01, 2018, 07:40:03 AM
Ok, turn bij hand is good.
I can only judge on the movie you post.
It sounds like the servo having trouble in the end (the sound it makes)
Perhaps there is a problem with the servo internally.
Normally it goes the same speed Open and close and the sound should be close to each other (open en close)
have you tried a other servo?
I have not yet tried another servo.
Although I think that is my next step now..
Thanks.
That power valve movement doesn't look correct.
Are the cables not installed backwards.
The cables crossover each other from the motor to pulley.
The cables from 1 marked not he motor are connected to 1 on the PV body and the same for cable 2, it's connected to 2 on the PV.
Should they be crossed??
Should be one to one just noticed the movement isn't correct. Should line up the notch and the hole behind the pulley after the movement.
Just seems to be stopping in the wrong place. Did you check the attached video I sent.
Your power valves go left then right.
Mine go right then left. Then line up with the hole. I would check that.....unless mine are wrong.
Any update. Did u manage to come right
Quote from: 000nicec on August 14, 2018, 10:58:37 PM
Any update. Did u manage to come right
Apologies for the delay.. working manic hours. OT's bike got nicked.. I'm hoping to get some time on the bike this weekend and I'll report back..
Any Update I am very intrigued to find out whose are right and whose are wrong ?:-|
Finally got some time to take a look at the 3MA..
I'm an idiot... Cables were crossed...
PV now functioning correctly
;D ;D ;D ;D ;D ;D ;D ;D
Sweet makes me feel better that mine are connected correctly. :)