Axius repair on used boat Cobalt 303

[muc]

Yes. There is no connection between B and D pin of TVM 14pin connector and there is no connection between B pin (TVM connector) and A26pin and B23pin from PCM connectors. There is also no co nection between D pin(TVM connector) with A1 pin.
At starboard engine these pins are connected. In addition, there is connection between B pin (TVM connector) and B16pin . This connection does not exist at starboard engine.......

I'm sorry but I can't seem to understand what you have posted here.
Maybe I'm looking at the wrong manual but when you say ----

"There is also no co nection between D pin(TVM connector) with A1 pin."

When I look at pin A1 at the PCM connector it's the "wake up power" that comes from the key switch to cause all the computers to power up . So it should send power to pin C at the 14 pin connector which will then send power to the TVM connector B at pin 8 and wake up the TVM.

When I look at PCM pin A26, B23 and B16 they don't seem to have anything to do with Axius.

So I'm not sure if I'm doing something wrong because I don't have access to the full wiring diagrams for your setup.

 

[muc]

I want to ask something else.
Last year the engines worked in guardian mode 50% with no active fault when scanning with diacom. My mechanic told that this happened because axius tvm was not connected. In case that the problem with axius will not be solved (back to steering cable as last year) and change the smart junction box with 2 junction boxes, one for each engine, will the 50% guardian mode go away and have 100% available power, or because the PCM555 is for axius, it will reduce the available power again to 50%?

This Is new information to me. I’ll need some time to think about it.

 

[silver_power]

This Is new information to me. I’ll need some time to think about it.

I am checking again the continuity tests i made and i just saw something.The A1 pin from PCM (12v wake uppower) is connected to 3 pins of the TVM harness giving obviously 12v to three seperate circuits. These pins are B,C,D.
In port engine D pin is not connected with A1 pin and obviously does not supply 12v to one of the three circuits of the TVM .
I hope this is my problem. ....
What do you think...is it possible??

 

[muc]

I want to ask something else.
Last year the engines worked in guardian mode 50% with no active fault when scanning with diacom. My mechanic told that this happened because axius tvm was not connected. In case that the problem with axius will not be solved (back to steering cable as last year) and change the smart junction box with 2 junction boxes, one for each engine, will the 50% guardian mode go away and have 100% available power, or because the PCM555 is for axius, it will reduce the available power again to 50%?

If the engine is in guardian it will set a fault code. Because Diacom didn’t show a code means that most likely it was a Axius code. Diacom isn’t very good with Axius. This is why Mercury G3 is needed and where G3 is connected is also important. When troubleshooting Axius plugging into the engine won’t give full coverage of Axius. If I remember correctly unplugging Vessel View and connecting G3 there is a sure way to get complete information.

I‘m surprised by the 50%. I would have guessed it would be higher. Loss of steering is a serious problem and would expect guardian to only allow 5%, basically idle.

I don’t know if your mechanic has done this yet, but I recommend that they check that all the computers are correct and have the correct software installed. Probably be good to check all the wiring harnesses are the correct part number. The fact that this boat would run at anything above idle leads me to think someone has modified the system to allow that to happen.
I don’t know how it works where you are, But here I would be contacting Mercury technical support and Cobalt to try and find out what components were installed when the boat was built and what programs were installed at that time to determine if anything has changed.

Yes the ECM on your engines has software installed for Axius and I would expect that it won’t run right without Axius working.

 

[silver_power]

If the engine is in guardian it will set a fault code. Because Diacom didn’t show a code means that most likely it was a Axius code. Diacom isn’t very good with Axius. This is why Mercury G3 is needed and where G3 is connected is also important. When troubleshooting Axius plugging into the engine won’t give full coverage of Axius. If I remember correctly unplugging Vessel View and connecting G3 there is a sure way to get complete information.

I‘m surprised by the 50%. I would have guessed it would be higher. Loss of steering is a serious problem and would expect guardian to only allow 5%, basically idle.

I don’t know if your mechanic has done this yet, but I recommend that they check that all the computers are correct and have the correct software installed. Probably be good to check all the wiring harnesses are the correct part number. The fact that this boat would run at anything above idle leads me to think someone has modified the system to allow that to happen.
I don’t know how it works where you are, But here I would be contacting Mercury technical support and Cobalt to try and find out what components were installed when the boat was built and what programs were installed at that time to determine if anything has changed.

Yes the ECM on your engines has software installed for Axius and I would expect that it won’t run right without Axius working.

Well, i repaired the harness, but nothing again.....i also checked the harness going from smart junction box to the engine and all the pins are ok ...i mean there is continuity between pins at start of harness and at the end...
All i can think now is two things.
1. The smart junction box with the ecm's maybe has problem and i do not know how to check it...
2. Something goes wrong with tvm software.....
Concering the software,.....if it had not the correct file why it worked at starboard engine.....???Remember that the port TVM works fine at starboard engine....
I asked my mechanic to reflash the TVM and check the software but he told me that since G3 find the TVM online and it says that the software is updated, there is nothing to make with software. I do not know if he is right....but i saw at the G3 both TVM's online and a green v telling that they are both updated. Is it really sign that software is ok?... if not, the G3 would had message that the TVM has wrong file loaded???
Now that the harness seems to be repaired does make sense to make again callibration at axius?

 

[silver_power]

The reflash of the tvm's is different than callibration?
I am going to tell my mechanic to make a reflash...maybe something was not installed correct. The reflash is made by click the reflash button at G3 after choose the ebom? It will chose by itself which software to install, or we must choose it? I am asking because i do not trust noone here.....the mechanics here in Greece have absolutely no experience to Axius...and everyone which i asked, they always tell me that Generation 1 had big problems and it is not good.
And something last.....If the reflash proccesion will be made with success, then i will be sure that the Command Control Module, Port and Starboard which are behind smart junction box is not faulty? ....or not????.....how can i test if port ccm is good???

 

[alldodge]

Has the PCM part number been verified it's the correct one?
Reading it shouldn't work with Axius removed, wonder if they were changed out

I'm finding 879194T17 for 377 Mag, closed cooling Axius

 

[silver_power]

Has the PCM part number been verified it's the correct one?
Reading it shouldn't work with Axius removed, wonder if they were changed out

I'm finding 879194T17 for 377 Mag, closed cooling Axius

My engines are standard cooling.
My pcm' are: 8M2015889 .
And what is this orange label which say : use with version 0076 command module only - do not mix versions ??

 

[alldodge]

You did post the PCM numbers prior, I just missed it

6.2 Bravo DTS Axius HPR" 8M2015889 & 8M0031299

Both part numbers show up on Mercury Parts, but neither show any motor listed for them, 8M2015889 has no superseded part number, 8M0031299 shows a prior number of 8M0071570 and list PCM 14.

 

[silver_power]

You did post the PCM numbers prior, I just missed it

Both part numbers show up on Mercury Parts, but neither show any motor listed for them, 8M2015889 has no superseded part number, 8M0031299 shows a prior number of 8M0071570 and list PCM 14.

What does it mean......is it possible that the pcms have been changed???

 

[alldodge]

What does it mean......is it possible that the pcms have been changed???

I don't know, MUC might
Could be they are good and only if your on your side of the pond they can be seen

 

[silver_power]

Is it possible with G3 to make something like uninstall the current software of CCM and install from beginning the version 0076 as engine pcm sais to the orange sticker?...or if for some reason (as i bought the boat used without clear service history) the ccm have some other version, can i i stall the correct version with G3??
Can i make the same to TVM???....Uninstall the current software and install from beginning what G3 suggests???

 

[silver_power]

I don't know, MUC might
Could be they are good and only if your on your side of the pond they can be seen

Maybe i must send an e-mail to Mercruiser with engine's serial and ask them if the PCMs i have are these which the engi es left factory....

 

[silver_power]

Concerning the 50% available power, i must check the starboard engine which tvm is fully working if it has this guardian limit as well........normally it should have 100% available power....

 

[alldodge]

Maybe i must send an e-mail to Mercruiser with engine's serial and ask them if the PCMs i have are these which the engi es left factory....

That would be a good idea, provide them engine and PCM numbers
In post 2 you listed your serial numbers but when I look up 1A437598 it comes back as invalid at mercruiser parts, and comes back as a Bravo drive at Mercury site

 

[silver_power]

That would be a good idea, provide them engine and PCM numbers
In post 2 you listed your serial numbers but when I look up 1A437598 it comes back as invalid at mercruiser parts, and comes back as a Bravo drive at Mercury site

Yes , the serials are 1A605669 & 1A605670.

 

[nola mike]

This thread is fascinating/terrifying. So... At this point, maybe calling Mercury tech support is in order?

 

[muc]

This thread is fascinating/terrifying. So... At this point, maybe calling Mercury tech support is in order?

Oh Ya, I'm pretty sure that's probably the only option. But the people there at tech support who have access to the needed information won't talk to the consumer. They will only talk to someone who has a CDS G3 and the only people allowed to have G3 is a dealership tech. silver_power won't be able to answer the questions tech support will ask.

The PCM part numbers that are posted look to be a "blank" PCM. These are PCMs that don't have any software installed. So when silver_power asks if they are the correct PCM, the only answer anyone give is --- maybe/maybe not. But tech support will know based off of the G3 report what software is installed. Tech support will also be able to help the dealer tech determine if all the CCMs and TVMs are correct and have the right software installed.

I know you said the power steering fluid is full, but the 1st generation of Axius has a very specific way to fill and bleed this system, if that wasn't followed. That could very well explain the pressure faults you see.

You said you repaired the wiring harness? I don't know what you did for the repair. But these data harnesses are considered not repairable and are replaced when they have a problem.

You asked about the power supply to the computers. All the computers in this package get at least 2 and sometimes 3 wires supplying power to them. They get 12 volts from the "keep alive" power and also get 12 volts to wake up.

You asked about the correct procedure to reflash and check software versions. Yes G3 can do this if the right hardware is in place. It is fairly complicated, if I remember right we spent the better part of the day covering this in the Axius class. The handbook we got at class spent about 40 pages covering this. Way too much information to cover in a forum.

I understand you losing confidence in mechanics. Some are better then others. But I'm guessing you will need to find the right one to get this problem fixed. Generation one Axius isn't a bad product. Once it's working properly. ALL of these computer controlled engine packages are very touchy when it comes to 12 volt power, ground and the wires that connect them.

 

[silver_power]

I know you said the power steering fluid is full, but the 1st generation of Axius has a very specific way to fill and bleed this system, if that wasn't followed. That could very well explain the pressure faults you see.

we did not make anything for bleeding the system......besides, there is no i formation about bleed the system in Axious service manual, so we supposed that the bleeding will be made it self during use, just like power trim .....

 

[silver_power]

we did not make anything for bleeding the system......besides, there is no i formation about bleed the system in Axious service manual, so we supposed that the bleeding will be made it self during use, just like power trim .....