| Author | Message | ||
     Lovedabueller |
So what gives..... the battery voltage is 12.0 and i cleaned all the connectors. reset the TPS and im still getting a COMM ERROR. i dont know what else to do. is there any way to ACTUALLY RESET the ECM? I know on most cars if you just unplug em they will reset. i have unplugged mine over night and i will see if this works. ANYBODY HAVE ANY OTHER IDEAS???? | ||
| Daggar |
Take it to the dealer and have them fix it. You may need a new IC. | ||
| Hdwrenchtx |
a battery is considered fully charged at 12.8-13.2 vdc. dont know if that has anything to do with your problem, but 12 volts is low voltage. 12.6 is a 75% charge. | ||
| Thedavyboy |
If your reading 12 volts while the bike is running most likely you have a bad stator . Just had mine replaced along with the regulator . (Message edited by thedavyboy on November 16, 2009) | ||
| Scott0827 |
Lovedabueller, hdwrenchtx has it right. And if you have a bad cell in the battery the voltage will drop drasticaly when you try to start the bike, in turn making the CEL... | ||
| Strongbad |
The COMM ERROR means that there is no CAN Bus communications between the instrument cluster and the ECM. 12V is sufficient to run the IC and ECM, so the battery isn't the issue. There could however be a number of things that could cause this. A bad IC, ECM, CAN Bus wiring, or front chassis ground are the first ones that come to mind. The only way to really figure it out is to check the ground and CAN connections and then start swapping parts. | ||
| Lovedabueller |
what is this CAN connection you speak of? | ||
| Strongbad |
CAN stands for controller area network and it is the communications method used to transfer information between the IC and ECM. It is a two-wire, differential type system that makes inter-connectivity between many systems pretty easy while being robust and using minimal wiring. | ||
| Hdwrenchtx |
if you have had your connectors apart to clean them or whatever make sure you did not bend any pins and make sure all wires are locked into their connectors. sometimes the wiring looks fine but if you tug on them slightly they will come out of the connector if it is not locked in properly | ||
| Lovedabueller |
The Error cam BEFORE i even took any thing apart. I got this error after a lowside at TWS. The "flashers" came on and the IC told me to shut off ignition. When i got the bike home after not anymore that day, i decided to check the DIAG mode to see what the flow volumes were with the exhaust i made were. when i did this the IC displayed COMM ERROR. AND THEN....... | ||
| Chevycummins |
12V is too low, while cranking it will drop into the 8V range and set the comm error. My bike does this if the voltage gets too low. Charging the battery fully is the first step. Should start with a battery voltage of 12.8V and see what happens. The bike will start with a low battery, so don't assume that because it starts the battery state of charge is good. | ||
| Ratbuell |
Which side did you lowside on? The ECM lives in one of the radiator pods...I want to say the left one. Sounds like impact damage to me... The flashers coming on indicate the BAS being tripped. | ||
| Chevycummins |
Missing terminating resistor? It should be under the left pod, the same resistor that we use to defeat the active intake solenoid. | ||
| Lovedabueller |
i low sided on the right. There is no physical damage to any electrical parts on the bike. | ||
| Lovedabueller |
cna these batteries be deep cycle charged. my buddy said to do this at autozone. he said that this is better than just charging the battery. True?? AND THEN........ | ||
| Buzzie |
I am with chevy on two points. One your battery getting a good charge should be first and formost with any electrical issue..and verifying the charging system is never a bad Idea. Also I would check to see if the resister is still pluged in..it is on the left side near the ecm if I am not mistaken....it does have an ohm measurement you can test | ||
| Chevycummins |
Some AGM batteries are hard to get charged fully. I bought a high frequency charger, it will charge just about any type of battery including AGM. It is a Black and Decker brand, bought it at Lowes. It was about $23, comes with a direct wire connector to a battery, alligator clip lead, and cig lighter lead. http://www.lowes.com/lowes/lkn?action=productDetai l&productId=284085-70-BM2B&lpage=none | ||
| Lovedabueller |
UPDATE. i just got the FULLY charged 12.64v battery back from Autozone. i plugged it in and im still getting the comm error. the codes are U0001 - comm error p0506 - iac int sys error i think this has to do with the noid removal right. any more ideas guys. keith | ||
| Strongbad |
If you have already checked the CAN bus connections and the front end grounds, the next thing is to swap the ECM and IC one at a time to see which one has failed. |
