xxdeh inc Posted January 20, 2022 Share Posted January 20, 2022 Went to start truck but it wouldn't start. Cranked for some time until eventually it dead or so i had though it died must have activated a relay. I put it on a basic code reader a code came up U1146. ( only code) I tried google it but it wouldn't pop up with a direct problem. Main them comes up is tcm / tcm connection. Would that be a reason for the truck not to start. When I it did have problem I assumed it was the started by the way it cranked. side note two weeks before the truck had an oil change at dealership. all was good. no codes but the bolt light was activated on the dash board and has but every time we take it get check no codes seem to come up. I don't understand what's wrong. Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/ Share on other sites More sharing options...
Onyx610 Posted January 20, 2022 Share Posted January 20, 2022 ALLISON AT Code (DTC) U1146 SCP (J1850) Invalid or Missing Data for Vehicle Security Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487465 Share on other sites More sharing options...
xxdeh inc Posted January 20, 2022 Author Share Posted January 20, 2022 (edited) 6 hours ago, Onyx610 said: ALLISON AT Code (DTC) U1146 SCP (J1850) Invalid or Missing Data for Vehicle Security Do believe that would keep the truck from starting or could it be the starter i was set on it being the starter until I got that code. Could a start make the check engine light go off ? Edited January 20, 2022 by xxdeh inc Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487470 Share on other sites More sharing options...
Onyx610 Posted January 20, 2022 Share Posted January 20, 2022 No, a starter would not activate a CEL. What makes you think the starter is bad? You said it cranked over until it didn’t anymore. Batteries dead? Or did the starter die in the process of cranking it over? I’d suggest checking out the harness/connector on the TCM. Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487471 Share on other sites More sharing options...
xxdeh inc Posted January 20, 2022 Author Share Posted January 20, 2022 It wouldnt start over it just cranked. Then i kept trying to start it until it died. Im going have to get it checked out. Would the tcm kept the truck from starting? Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487473 Share on other sites More sharing options...
Onyx610 Posted January 20, 2022 Share Posted January 20, 2022 There’s a good possibility, someone that knows more then me on this will pry comment soon. The fact that your code has to do with vehicle security kind of says something. Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487474 Share on other sites More sharing options...
JoeH Posted January 22, 2022 Share Posted January 22, 2022 Sidenote, don't crank an engine for longer than 10 seconds. You'll overheat the starter and burn it out. If it cranks but won't start and has a Check Engine Light on there's no sense in killing the batteries and starter. You're on the right path trying to get this code sorted out. Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487644 Share on other sites More sharing options...
Joey Mack Posted January 22, 2022 Share Posted January 22, 2022 check fuse 71, in the EPDM.. its under the dash where the clutch pedal would be... Quote Link to comment https://www.bigmacktrucks.com/topic/69086-mack-cxu613-wont-start-send-help/#findComment-487649 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.