07-14-2022, 10:46 PM
I agree with Michael. The transmission issue is a probable cause of your no-start situation. Danny also has a point about engine shutdown while in gear.
You may need to clear out some temporary status on the transmission by completely removing power from it for at least 10 minutes.
You may need to inspect wiring harness/speed sensor damage as well. If the transmission cannot verify certain speeds it may, like my eaton fuller, decide to do nothing and not allow the engine to start.
10 minutes is the time that works on my Eaton Fuller Ultrashift transmission (automated manual transmission). It does not want to be shut down except in neutral as well. Like other diesels, my Volvo will demand a shut down if the coolant sensor (in the overflow bottle) goes low, even for a second, while in a sharp turn. As a result, I've experienced a few of these situations. I pull a relay and a fuse for 10 minutes and all is good. The transmission does a restart from cold and allows the engine to start. By the way, if a problem still exists it may still inhibit performance or starting.
In a completely different direction, verify that you actually have 12 volts power to your engine ECM. Its possible that broken wire at the connector may cause this situation. Watch the following video (at about 7 and a half minutes) where a Newell was disabled and the fix was a re-pin of the engine ECM power.
https://m.youtube.com/watch?v=NX2bDuNz5aA
Hope I didn't ramble too much.....Bob
You may need to clear out some temporary status on the transmission by completely removing power from it for at least 10 minutes.
You may need to inspect wiring harness/speed sensor damage as well. If the transmission cannot verify certain speeds it may, like my eaton fuller, decide to do nothing and not allow the engine to start.
10 minutes is the time that works on my Eaton Fuller Ultrashift transmission (automated manual transmission). It does not want to be shut down except in neutral as well. Like other diesels, my Volvo will demand a shut down if the coolant sensor (in the overflow bottle) goes low, even for a second, while in a sharp turn. As a result, I've experienced a few of these situations. I pull a relay and a fuse for 10 minutes and all is good. The transmission does a restart from cold and allows the engine to start. By the way, if a problem still exists it may still inhibit performance or starting.
In a completely different direction, verify that you actually have 12 volts power to your engine ECM. Its possible that broken wire at the connector may cause this situation. Watch the following video (at about 7 and a half minutes) where a Newell was disabled and the fix was a re-pin of the engine ECM power.
https://m.youtube.com/watch?v=NX2bDuNz5aA
Hope I didn't ramble too much.....Bob
Bob & Dottie
Newell 1261 & Jeep Grand Cherokee fulltimers
Past Teton Reliance 45' 5th wheel
Custom Volvo VNL780 tow vehicle
2014 Smart car