Hey All,

My car isn't cranking or starting scanned it professionally and these three codes came up "Lost Communications with ABS Module, System Brake" and "Crash Input". Any ideas on how to diagnose? What areas should I test and how can I test the modules?

 

For those codes I believe that you need to reset the modules.

A Freel2 owner had this problem and fixed it by resetting the modules (the mechanic that read these codes should be able to reset the modules)

Quote from Boxiebrown on FREEL2

Its a long read but more things to try are included in the complete Thread

https://www.freel2.com/forum/topic33546.html

Post here what fixes your no start

Take care

Paul

 

Well I have erased the codes before and while the code is erased shortly after I get a crank but not a full start. Im assuming thats because the modules aren't up yet and once they wake up the code comes back and no crank at all. How can I reset the module is it different from just erasing the codes? I was also thinking about checking for an open circuit in the CAN Harness which can be done with an Multimeter my question is how. Common sense tells me I would go to the ABS Module first and inspect the positive and negative points to ensure the module is receiving proper power. After that I can test the can harness to measure for 60 ohms being everything works currently 120 ohms meaning there is a short. Im stumped at what part on the CAN Harness can I place my multimeter leads on to obtain a reading?

 

Reset everything by disconnecting both battery terminals and waiting at least 20 minutes. Then connect the positive first, then the negative.

 

wow sounds simple enough thanks will do

 

Also can be helpful to touch the two battery leads together before re-connecting, to help drain any capacitors which might be keeping volatile memory alive.

 

Hey guys, we should start sharing with everyone: Check the voltage on the disconnected battery!
Despite its name, 12v read won’t cut it.

 

Yes and even then, that doesn't guarantee the battery is good and will function after sitting for a while, or in cold weather.

If in doubt take it to the FLAPS and have them put it on their health tester. Or you can buy one of your own, I never bothered since I live in socal and can milk tired batteries on most cars for about 7 years if I'm careful with them. But if it's cold out, you need a healthy battery.

You can also check yourself if it's not a sealed battery by fully charging, letting it sit (disconnected) overnight, and then checking voltage and each cell's gravity.