Stranded again North Carolina

Scott & Heather · September 20, 2017, 06:28:16 PM

Coach has been running perfect for hours, stopped at Loves to get fuel and shut her down. Now she won't start. She's getting fuel, it's acting like a sensor fault of some sort. I don't have a code reader. Anyone near central North Carolina that can help? Fuel is coming out of primary filter line when I take it off and it's definitely diesel. No smoke while turning over. Acting just like a bad sensor. I need a code reader since I'm stuck at a fuel island. Who is the nearest place I can have it towed to?

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Bill Gerrie · September 20, 2017, 06:43:36 PM

Check the circuit breakers or fuses that provide power to the DDEC ECM. Make sure wire 240 and 241 have 12 volts at the power plug at the ECM. You should have a momentary diagnostic request switch that will let the red and amber lights read out the codes for you. If the supply voltage is under 10.5 volts chances you won't start as well.

wildbob24 · September 20, 2017, 06:44:25 PM

Bill and I typed at the same time☺️

You can also jumper the A and M terminals on the Data Link Connector and flash the codes with the Check Engine Light. Seems like the most common problems with these things are the ECM fuses located in the battery compartment and low coolant level.

Bob

Scott & Heather · September 20, 2017, 08:30:53 PM

Thanks guys. I do have power to the ECM. I've been there done that last year when my ignition relay died. My dash lights were destroyed by previous owner and don't work. I do have the connector down on the floor by the drivers seat that I can use to get readings. Can I put a test light of sorts in one of the pins to read codes? What the fastest way for me to get a code reader for this? I am almost certain a sensor is faulting like maybe the low coolant sensor or something

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wildbob24 · September 20, 2017, 09:44:49 PM

The check and stop engine lights are controlled by the ECM and are not connected to the data link connector.

The readers pop up on eBay periodically, but that doesn't help you tonight:

https://www.ebay.com/i/332357357083

If you think it's the coolant level sensor, you can bypass it by jumping across the connector and see if that makes a difference.

Bob

Scott & Heather · September 21, 2017, 04:52:10 AM

Bob tell me more about bypassing the coolant sensor. And guys seriously is that link to the Nexiq scanner the one I need? I'm ready to buy one right now and overnight it. Should have done this long ago. If anyone has one they are willing to sell, let me know. If that's the one I need in the link bob posted then I'm all over it

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John316 · September 21, 2017, 05:39:51 AM

Check your transmission fuses. We lost a fuse and bus wouldn't start.

Do you have lights on your shift pad, when you turn your master switch on?

brmax · September 21, 2017, 05:58:42 AM

I would use what the designers made! The printed document shows and clearly says jumping the specific terminals. Does in fact trigger the ECM to flash any fault codes as listed in the diagnostic sheet.
I would love to have a new diagnostic box but in the mean time. We should help with whats designed and available.

Floyd

Bill Gerrie · September 21, 2017, 06:22:37 AM

Scott
That is the reader you need but check the DDEC version you have. DDEC I is two computers and DDEC II is one computer. $545 is a decent price. If you have DDEC I you can clear codes by disconnecting all power to the ECM but if DDEC II or higher you must have this reader.

B_K · September 21, 2017, 06:28:54 AM

I'm pretty sure Scott is a 2 or 3!

Scott on a Setra S215 I used to work on for a customer we had low coolant sensor failure once and Setra tech support had us unplug the sensor and bypass it at the plug with a paper clip to get it home where a new sensor was overnighted to us. HTH!

Man I can believe the # of busnuts broke down right now, you in SC, Ned in KY, Dan in GA, the Coffee bus in TN and who knows who else!

BK

Scott & Heather · September 21, 2017, 06:32:22 AM

So I just pulled all the ECM fuses and sprayed electronic cleaner in them and put them back. Pulled connectors to various sensors in engine compartment coolant level sensor etc and sprayed electronic cleaner and put them back. Coach magically starts now. Weird.

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Scott & Heather · September 21, 2017, 06:36:26 AM

Can someone tell me (BK maybe) which sockets you jumper to bypass the coolant sensor? I'd like to know this for future reference. I am still ordering a code reader. This is ridiculous how many times I would have given my first born for one.

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luvrbus · September 21, 2017, 06:45:39 AM

Do the simple things first check you power supply and grounds ,if the check engine on the dash does light up the thing will not start.The TRS are behind the cam pulley check the connection on those.If you want a Pro/Link keep your eyes on Ebay Andy paid 100 bucks for his with the DDEC carthage they are nice to have but they don't solve all your problems

B_K · September 21, 2017, 06:46:29 AM

Scott on the Setra we did that on the coolant sensor was located just above the radiator and we unplugged it right at the sensor and looped a paper clip right there at the plug. (two wire plug)

BK

wildbob24 · September 21, 2017, 06:49:17 AM

Scott, the coolant level sensor will be in your radiator surge tank up over your head when you're looking at your engine. It will have a 2 pin connector that you can jump across with a paper clip, as BK suggests.

That ebay reader is the one you need and I agree it's reasonably priced. If you have a DDEC engine you really should have a reader. I'd fix the CEL and SEL too, at your earliest convenience

Bob

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