need help whit bosch 0 227 200 002

[brumono]

hello my name is bruno, i am new to this forum, I would like to thank you all for that because contributions and could solve a lot of my cars, I have a little doubt in my CD bosh 0227200002 ,in the "A" terminal is 340V outlet , and I have 12V output in the"C" exit to distributor, this is normal? that according to schemes "A "doe output connects to the coil 15 and coil we put 350v 12V not gonna break?, so the car will not start so not know if something is wrong, any ideas?, greetings and thanks for everything

[E Sully]

I am a little confused by your question. This is the normal wiring of the early CDI ignition.
Battery voltage goes to terminal B, C is the trigger to the points, A is the output from the CDI to the coil terminal A(15), D is the ground connections. When connected, there should be a high pitched whine from the CDI unit.

[brumono]

ok.accurate, the problem is that the terminal "A" is the output voltage of 350v, and if this is not correct because it works on a 12V coil.or is normaly this voltage in output de cdi "A"to 15 terminal coil.

[brumono]

excuse me , thanks for all E sully.

[brumono]

Hello again, today I been testing my Cdi and my car will not start, the CDi boot for that heard the whistle, shows 12v for output C, and initially without connecting the output A, the 15 coil I have 250v 300V but when I connect the output A, the terminal 15 of the voltage in the coil winding is 0V ,and found that across this good earth, any idea that you may be failing in my CDi, hope your help thanks

[timmy2]

Have you tested your coil? It maybe internally faulted to ground.


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[brumono]

yes and I replaced for a new coil

[brumono]

and thanks Timmy2

[Flojo]

Originally Posted by brumono

yes and I replaced for a new coil

what coil?!
not all coils work with the HKZ system!

can you please identify your "before" and "after" setup (and maybe the car/motor too) so we get a clue of the overall?!

did you check the impulse wire from the CDI to the distributor (imho the green one)?!

thanks!

(by the way: my 6-pin CDI from my SC got burnt due to a brasil silver bosch coil, who are nown for poor quality. end of the story is: I baught a brand new permatune, checked all wiering and baught a brand new MSD2 high vibration coil. works like a charme. the old CDI was refurbished by a german pro and sits now in a box on the spare parts shelve.)

[john walker's workshop]

new bosch silver coils are junk. try to find an original black one.

[ischmitz]

It could still be a bad CDI box. Whistling alone isn't a guarantee the box works is fine. It only tells you the DC/DC converter in the box works.

The reason you see 350V is that Terminal A connects the internal capacitor to GND through the external coil. The other side of the internal capacitor is connected to the output of the DC/DC converter.

With a CDI system the coil isn't the storage element for the spark energy but merely acts as a transformer. So the coil will not get damaged by the 350V because the current is very low during the charging event of the capacitor. To release a spark the internal side of the capacitor hooked to the DC/DC and charged up is connected to GND and the energy stored in the capacitor discharges into the coil. That's when the spark is generated.

Regards,
Ingo

[timmy2]

I was just checking that his coil (transformer) was good. Still not sure what he is using.
No capacitor discharge would stop him in his tracks though...

Brumono,
Ingo repairs the CDI boxes. You might want to consider sending yours to him to test and repair if necessary. From what I understand he is very reasonable with pricing.

[brumono]

hello boys,tahnks for your help, my CDI is installed on a indy maserati america 4900, has this CDI source, have the original coil black bosch installed and coil it okay that is proven, which commented before and after, good is simple, when the power output A is loose coil in have 350V but nothing more I connect to the terminal coil 15 the voltage is 0V, if I try to start my car the coil never fed always see 0V between 1 and 15, and when I try to boot to the C output look like the voltage of 12V ranges from 12V to 0V 12 0V, so I think the trigger to this, the problem is the lack of nutrition in the coil, and this is my question, if I measure my coil 1 and 15 and try to start I have to see on my multimeter?, greetings and thank you very much.

[ischmitz]

A multimeter is the wrong tool to diagnose a CDI system. You need an oscilloscope.

If the system is working the coil will show 0V at both primary terminals with no trigger signal to the CDI box and the box whining. Once a trigger signal is created (points close and connect pin C to GND) the primary coil input will see a very short 350V pulse while the capacitor discharges into the primary. On top of that pulse is a sharp spike (when the spark jumps).

Ingo

[HarryD]

Bruno, You may be overthinking how to test. Try this:

Originally Posted by HarryD

To get a spark to the spark plug in the engine. Several things need to happen. First, you need power to the CDI. Next you need to have a way to trigger the CDI (the points do this by opening and closing). Then the CDI will then send a pulse to the coil which will increase the voltage and send it through the high tension lead to the rotor and to the selected spark plug. You need to verify that each step in this chain is working.

1) Verify that the CDI is getting power. Do you hear it wining (if it is a Bosch unit)? If so, you are good to go.

2) Verify that the CDI is producing power to make a spark. You can do this with a "telegraph" test. Take the high tension lead off of the center of the distributor and put a spark plug on it. Ground the threaded part. With your plug attached to the center lead, open the distributor, remove the rotor, place your key in the run position, and manually open and close the points. Each time you cycle, you should see a spark from the plug. If you do not, you may have a bad CDI.

3) Verify that the coil gets a signal when you crank. Replace the rotor and distributor cap. Leave the plug on the center high tension lead. Crank the engine. Do you see a spark? If so, you are getting spark to the distributor. If not, your point gap may be off or there is some other problem with the connections.

4) Verify that the spark goes to the spark plug wires. Reattach the center lead to the distributor. Attach you spark plug to one of the leads going to the cylinder spark plugs and ground. Crank engine. If you see a spark you may have a timing problem. If no spark, you have a problem with your rotor or distributor cap or your wires are improperly seated.

Do a search here as there are many threads on this topic. Look especially for the ones by early_s_man. Warren (RIP) left a great deal of knowledge on troubleshooting this problem.

[brumono]

thanks for all Harry D , thanks guys, tomorrow i prove this whit my osciloscope,thanks tahnks

[brumono]

good night, today I prove the test off Harri D sayd me and my CDI no spark plugs when i trigger the point "telegrafp test", any idea what can happen to my CDI? i heard the wistle but no spark.Thanks again.

[ischmitz]

Your box might need repair

[brumono]

yes Ischmitz,my box is broken , i Think the problem is the trigger control board, I dissamsemble the unit and check one and one the components , thanks for your help and time.

[brumono]

Hello again, I am rebuilding my CDI and can not find any information about these diodes some people know you can replace component D1 D4..... five diodes whit a bosch mark in the schematics.Thanks...