BIG ERT 1 Posted March 19 Hello everyone, I’m new here thanks for allowing me to be here. I have a 2019 TRX420FA2 that flashes a bar (-) 4 times. Can anybody help me to understand what this means. Thank you. Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 21 Welcome aboard. If you go to the "service manuals" at the top of the page, click the links to download the service manual. Section 4-8 and 4-9 have the error codes. There is no code 4, but there is a code 44. Is your cooling fan on as well? Share this post Link to post Share on other sites
BIG ERT 1 Posted March 21 Thanks for the info. That’s why I’m so confused because it is 4 short flashes and no my fan is not on. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 21 One other thing is I put a new main valve body, shift motor, and a new shift angle sensor. Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 21 18 minutes ago, BIG ERT said: Thanks for the info. That’s why I’m so confused because it is 4 short flashes and no my fan is not on. Have a smartphone? Can you take a video of the flashing and post it up? Share this post Link to post Share on other sites
BIG ERT 1 Posted March 21 Please let me know if this comes through. Thanks for your help. IMG_3525.mov Share this post Link to post Share on other sites
toodeep 1,758 Posted March 21 Does it have a long pause at the end with a -- and then the 4 flashes again? Have you shifted it manually to make sure it's in neutral and not stuck between 2 gears? Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 21 16 minutes ago, toodeep said: Does it have a long pause at the end with a -- and then the 4 flashes again? Have you shifted it manually to make sure it's in neutral and not stuck between 2 gears? Video above worked for me. Looks like error code 4, which isn't in the FSM. You have any ideas? Share this post Link to post Share on other sites
toodeep 1,758 Posted March 21 3 hours ago, jeepwm69 said: Video above worked for me. Looks like error code 4, which isn't in the FSM. You have any ideas? It cut off before it went through the check phase and then repeat the code (same or different). If it continually repeats the 4 flashes with no long pause (check) I have no idea and shifting it manually should bring up a code. It will be a worthless code (self inflicted) but a code. If it is stuck between gears (I've had it happen a few times) that might be all it takes to get it going again. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 22 Ok cool. Thanks I will check on the morning. I will repost to let you know what I find out. Thanks again. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 22 Good morning everyone, So I used the manual tool to shift it and it does not shift. Now before I put the new valve on it shifted and drove. Really has me baffled. Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 22 I don't think the valves really have anything to do with the mechanical aspect of the shifting. They divert oil pressure to the dual clutches. Is that correct @toodeep? (otherwise I'd tell you to remove the valve and see if it will shift with the valve not in place, but I don't want you to do unnecessary work and i think toodeep has more experience with these than I do) Share this post Link to post Share on other sites
toodeep 1,758 Posted March 22 37 minutes ago, BIG ERT said: Good morning everyone, So I used the manual tool to shift it and it does not shift. Now before I put the new valve on it shifted and drove. Really has me baffled. It is trying to shift but won't go into a gear (rocking the machine back and forth) or won't shift at all? If not at all I would start with removing the shift motor cover so you can watch the gears when trying to shift. If you get to that point you can also remove the gears and make sure the shift shaft to returns to the neutral position by its self (important that it does) when trying to shift it. 1 Share this post Link to post Share on other sites
BIG ERT 1 Posted March 22 Correct it will not shift even rocking it back and forth. Ok I will let you know the outcome. Thanks again. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 22 Ok so I pulled the shift motor and cleaned everything re-greased the gears and got it to where it would shift into1st, 2nd, and 3rd but wouldn’t go any higher, it will down shift but won’t go passed 1st. I am going to change the shift mechanism on the handle bars. It’s the only other thing I can think of. Share this post Link to post Share on other sites
toodeep 1,758 Posted March 22 Did you make sure the shift shaft will return by itself with the shift reduction gears removed? There is a stop pin inside the motor that can break and that will tell us if it has or not. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 22 Is there a way to check it or what do I need to look for? Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 25 On 3/22/2024 at 3:41 PM, BIG ERT said: Is there a way to check it or what do I need to look for? Gotta pull the front cover. It's # 18 in this schematic. https://www.partzilla.com/catalog/honda/atv/2009/trx420fa-a-fourtrax-rancher-at/gearshift-fork If you stand the machine up on the rear rack it will sit upright, and you can pull the front cover off and check it out. Turn your fuel petcock off and cap the vent line on the gas tank before you do so. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 26 Ok I can do that. Is there any way to use a scope of some kind to look at it through any opening? Share this post Link to post Share on other sites
jeepwm69 7,609 Posted March 27 Not really. You have some sort of issue under there so I’d just pull it and see what you find. Share this post Link to post Share on other sites
BIG ERT 1 Posted March 27 Great help. I just took it to a shop where they can find out what’s up. I will let you know when I find out. Thanks again. 1 Share this post Link to post Share on other sites
toodeep 1,758 Posted March 27 When your manually shifting it, when you push or pull the lever the internal spring should try to put the shaft back into the neutral state. With the shift reductions gears installed it will give drag on that, the reason I said to do it when they was out. If it "springs" back, that pin will be good. If it doesn't, you found a problem and time to tear into it. Share this post Link to post Share on other sites
