Wakebird Posted April 18, 2021 Share Posted April 18, 2021 Hi there! Im new here on this forum, and i hope someone can help me out. Im located in Europe, so English is not my native language, so im sorry of i miss spell some things! I have some troubles with my zero off cruise. A few posts on this forum has helped me a lot allready, but i still cant get it working.. I own a 2011 wakecraft boat with a 343 pcm engine. It has a factory zero off cruisecontrol that has never worked since i own the boat. The zero off cruisecontrol screen and menu works fine. It tells me the speed im going, and i can set the disired speed, but it wont regulate the boats speed. Also the rpms wont show up. So basiclly the single gps puck and the screen works fine. From the zero off screen i can see and follow two can wires (blue/purple and blue/white) to a triangle plug. From this plug it goes into a extention cable towqrds the engine, where they are connected to two cables in the main engine harnas. I think there has to be a bad connection in the can wires somewhere, but all the connections are good as far as i can tell. I am thinking to try and connect two new wires from the main harnas to the screen, to be sure there is no problem in the wire. Any ideas or tips? Everything is welcome! Link to comment Share on other sites More sharing options...
Baller skier2788 Posted April 18, 2021 Baller Share Posted April 18, 2021 Have you gone through the menus and looked at the Zero Off diagnostics screen? If it is a can bus problem it will show a code for that. Link to comment Share on other sites More sharing options...
Wakebird Posted April 18, 2021 Author Share Posted April 18, 2021 I have seen people talk about those fault codes, but i cant find them in the menu. Can you explain how i can find that diagnostic screen? Link to comment Share on other sites More sharing options...
Baller skier2788 Posted April 18, 2021 Baller Share Posted April 18, 2021 Assuming you have the round ZO head unit. Push and hold menu until a bar across the top comes up. Then select screen should be the first option. Then scroll down to diagnostics and select. Link to comment Share on other sites More sharing options...
Baller skier2788 Posted April 18, 2021 Baller Share Posted April 18, 2021 Link to comment Share on other sites More sharing options...
Wakebird Posted April 18, 2021 Author Share Posted April 18, 2021 Jep i have a round ZO unit. Black background, but same buttons. Ill try that tomorrow, thanks! Link to comment Share on other sites More sharing options...
Baller skier2788 Posted April 18, 2021 Baller Share Posted April 18, 2021 Link to comment Share on other sites More sharing options...
Baller skier2788 Posted April 18, 2021 Baller Share Posted April 18, 2021 Link to comment Share on other sites More sharing options...
Wakebird Posted April 20, 2021 Author Share Posted April 20, 2021 I checked the diagnostics, but it has 0 faults. Whenever i disconnect the blue/purple canbus wire it gives me a fault. When the blue purple one is connected and i disconnect the blue white one it doesent give me a fault.. So basiclly the ZO unit gives me 0 faults, but it wont control the boats speed, and it wont show the rpm. Any ideas?? Link to comment Share on other sites More sharing options...
Baller jpwhit Posted April 21, 2021 Baller Share Posted April 21, 2021 One possible cause is the ECM firmware in your PCM EX343 isn't the correct version needed by your Zero Off. Link to comment Share on other sites More sharing options...
Wakebird Posted April 21, 2021 Author Share Posted April 21, 2021 Is it possible to update that? Link to comment Share on other sites More sharing options...
Baller jpwhit Posted April 21, 2021 Baller Share Posted April 21, 2021 Yes, it can be updated but you'll likely have to send it somewhere to be done since it requires special software and equipment. Link to comment Share on other sites More sharing options...
Wakebird Posted April 21, 2021 Author Share Posted April 21, 2021 any ideas how to check if i have got the right ECM filmware? The boat has factory ZO cruise, so id say the ECM and ZO should work together. Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 21, 2021 Baller_ Share Posted April 21, 2021 Do you have a RPM signal at the display? Link to comment Share on other sites More sharing options...
Baller LK_skier Posted April 22, 2021 Baller Share Posted April 22, 2021 Do you know how to use Zero off? just making sure its not something simple like not having it set to "on" Then you have to use the throttle to get up to speed and keep the throttle on to maintain that speed you have set Link to comment Share on other sites More sharing options...
Wakebird Posted April 22, 2021 Author Share Posted April 22, 2021 @Jody_Seal i have no RPM signal at the display. When i put it on RPM only mode it sais 0 RPM while the enigine is running. This should be a canbus problem, but it has 0 faults in the diagnostics screen. When i unplug the can wires the fault: J1938_txfail. When i plug the wires back in the fault goes away. The fact that it has no RPM should mean that there is a canbus problem, but since it has 0 faults in the diagnostic screen you'd say there isent...bit strange huh? @LK_skier Lest hope that im doing something wrong, that would solve the problem right away!:D Allright, so i set my ZO in wakeboard mode since all i want to do is maintain the set speed. I set the speed to lets say 22miles per hour, and i put it ON (right bottem of the screen). Now i pull my skieer from the water using the throttle. When the speed im going is near the set speed the ZO unit gives me a beep noise. Normally the ZO should take over (right?), but at this point nothing happens. When i dont touch the throttle the boat will go faster/slower just as if there was no cruisecontrol.. Link to comment Share on other sites More sharing options...
Baller jpwhit Posted April 22, 2021 Baller Share Posted April 22, 2021 After it beeps, you have to push the throttle further open. And you really should push it all the way to full throttle. The Zero Off only "takes over" in the sense that it can only control the throttle to be less than the position of the throttle handle. If it's working correctly, the speed should stay at the set speed as you push the throttle forward after the beep. If the boat continues to speed up, then it's not working correctly. I think you can check the versions of the ECU firmware using Rhinda DIACOM. But I can't remember for sure and my DIACOM stuff is at my lake house at the moment. So I can check this weekend. Link to comment Share on other sites More sharing options...
Wakebird Posted April 22, 2021 Author Share Posted April 22, 2021 Ill try that out next time i have the boat out. So basiclly full throttle when it beeps...Lets hope that works! Link to comment Share on other sites More sharing options...
Baller ral Posted April 22, 2021 Baller Share Posted April 22, 2021 If the system is engaged and cannot maintain speed at the specified level (i. e. speed gets lower) it should start beeping constantly until speed gets back to the specified level. Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 22, 2021 Baller_ Share Posted April 22, 2021 @Wakebird If you have not any tach signal your speed control will not function in any mode. Check your can bus connections. Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 @Jody_Seal yea i know, thats the confusing part..The canbus connections all look good. When i check the connection with a multimeter from the back of the ZO unit to the 8 pin plug that goes into the boats harnass the connection is perfect. The ZO has 0 canbus faults in the diagnostics screen. The faults does appear when i unplug the canbus wire from the boats harnas, and it dissapears when i plug it back in, so you'd say the canwires are fine.. I have thought about installing two new can wires from the main boats harnas to the plug on the back of the ZO unit to make sure there cant be any faults in any plugs possible. I will be useing braided canbus wire. Any thoughts on that idea? Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 I might have found something here..Maby some of you knows this. I was checking the mainenance manual of the PCM 343 engine, and i saw this picture. It shows the boats cable harnas. On my boat the two canbus wires are connected to the 8 pin plug. But on the foto it sais the round plug should be the speedcontrol / can bus connector. As i can tell by this photo my ZO was (factory) attached to the ''Check guages lamp'' and ''tachometer'' wire. Not so strange that it aint working.. Does anyone know what cables i need to attach them to? Maby there is someone with a PCM 343 who can take a picture where their can wires are attached to? Link to comment Share on other sites More sharing options...
Baller LeonL Posted April 23, 2021 Baller Share Posted April 23, 2021 @Wakebird I've got a 343 and will gladly look at mine and take a pic, but where is this connection that you have a question about? Near the ECM or? Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 It is at the back of the engine. a bunch of cables / connectors come out of the main boats cable harnass. (looks just as on the photo in my last post). Its located on the starboard side of V drive gearbox. On my boat the engine is all the way in the back, i can lift the whole back bench + engine covers so i can get suepr good acces. Not to sure how good you can find them if you can only acces the engine from the top. Basicly what i am looking for is the connection between the ZO harness and the boats harness. On my boat they hooked the ZO up on the 8 pin connector on the pic above, but i believe i should be on the round one according to the picture in the manual. If u can find that on ur boat that would help me out a lot! Thanks! Link to comment Share on other sites More sharing options...
Baller LeonL Posted April 23, 2021 Baller Share Posted April 23, 2021 This probably won't help, but here it is. This is at the rear starboard side. One says"boat hrns". The connection to update revisions is from starboard. Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 Can you see two braided cables going towards the dash somewhere? On my boat its just two wires braided around eachother, with a ribbed protection tube around it. Those two are the canbus wires that connect the boat with the ZO unit. I need to know where they should be attached to, since i believe mine are attached to the wrong ones... Im not near my boat at the moment, otherwise i could make a pic of what i mean. Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 Those two wires connect to a 8 pinn plug on my boat. I think i can see that 8 pin plug on your photos to, so i think thone braided wires should be there somewhere Link to comment Share on other sites More sharing options...
Wakebird Posted April 23, 2021 Author Share Posted April 23, 2021 I found this wireing diagram from a 210 super air nautique. Its a different boat, but it has the same 343 engine. I can see the round plug, marked with ''Perfect pass connection''. I think this is the same round plug as i got on my boats harnass. On the wireing diagram two of the pins on that plug are canbus high and low. I think im on to something here! Link to comment Share on other sites More sharing options...
Wakebird Posted April 28, 2021 Author Share Posted April 28, 2021 @LeonL @Jody_Seal Thanks for the help, wanted to let you know that the cruise has been fixed. The ZO can wires were connected to the wrong wires on the main boat harnass. So a factory fault...So if anyone has this problem with a 343 PCM: check if the can wires are connected to pin 16 and 17 of the big round plug at the back of your engine! Link to comment Share on other sites More sharing options...
Baller skiinxs Posted April 28, 2021 Baller Share Posted April 28, 2021 Wow, I wonder how the boat went through its warranty period when new without this being fixed, since it never worked when new. I know there were a few instances in the 2008 time frame where the pins were reversed in the diagnostic connector, but those would never have been noticed unless a Diacom or ZO upgrade cable use was attempted. Link to comment Share on other sites More sharing options...
Baller LeonL Posted April 28, 2021 Baller Share Posted April 28, 2021 so, you're saying that a 10 year old boat has had incorrect ZO connections from the factory and just now coming to light. I assume that you are just now taking ownership. The previous owner(s) never used ZO? Glad you got it fixed! Link to comment Share on other sites More sharing options...
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