Stranded on an exit ramp - Stop Engine and ABS lights

Topic: Stranded on an exit ramp - Stop Engine and ABS lights (Read 5263 times) previous topic - next topic

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #125 – June 13, 2023, 09:18:51 am

Bypass the coolant sensor
Jumper the ignition switch so that the engine lights
Come on .
Crank the engine and watch the volts. They have to read over 10 ish for the ecu .
Clean all of the grounds. From battery , engine to chassis , ecu. Etc
Ground failure is very common from storage .

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #126 – June 13, 2023, 09:19:34 am

I hope the ECM isn't your problem, but thought I'd mention Midwest ECM Repair. Midwest ECM Repair-Cummins reman. ECMs
I had them rebuild an M11 ECM 10-15 years ago from a semi tractor that I had. There is some good info on their website including some troubleshooting.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #127 – June 13, 2023, 09:25:12 am

Do you have a part#/source for the coolant sensor? Thanks

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #128 – June 13, 2023, 09:26:09 am

Quote from: dsd – June 13, 2023, 09:08:48 am

When I had my bad sensor I tried to bypass it. I was unable too. I was real serious and confident I could, but could not. It would start run and shut down after thirty seconds.

I'm hoping that since the Walker coach is a older year model, the ECM and sensor system is not as sophisticated and "smart". Perhaps it will be more easily fooled?

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #129 – June 13, 2023, 09:26:34 am

Quote from: wolfe10 – June 12, 2023, 05:16:54 pm

IMO, getting good steady 12+ VDC to the starter AND to the front of the coach is job one. When turning the key to the first position takes voltage at the ignition solenoid from 12 to 0, do not expect anything to work properly.

Trying to diagnose computer or sensor issues with incorrect voltage supplied to them can lead to a lot of false "rabbit holes".

After the basic electrical issues are resolved, absolutely the next step is to clear and recheck for diagnostic codes-- engine and transmission.

Many have mentioned the engine codes.

The transmission codes are even easier to access:
Turn ignition key on (so transmission shift pad illuminates)
Press the up and down arrows on the shift pad at the same time. That will either bring up d-1 OR on newer ECU's it will bring up OL. If OL, merely press the up and down arrows again at the same time.

Now, d-1 will come up and will display the first diagnostic code, Just write it down-- refer to your Allison owners manual or online. If there is no diagnostic code you will get d-1 followed by - -.

If there is a code for d-1, press the mode button to bring up d-2. Continue until you get d- "something" - -.

Turn off the key. You are done.

This is correct information. Please understand these units are programmed by much more involved scanners than what most of us own. There are many more layers of diagnostic levels. Ive been studying HP tuners and am amazed at what can be looked at and touched with the right tools. Invisible without. Crazy thing with HP tuners, they only use four wires to stand alone tune a ECM with hundreds of functions that can be modified hundreds or more ways.. Wish I had a better understanding. Hard for me to rap my mind around all this information in two wires. The other two wires are power and ground.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #130 – June 13, 2023, 09:29:01 am

Quote from: craneman – June 13, 2023, 09:18:40 am

It was your issue Scott that has me carrying a spare coolant sensor and cam position sensor.

Common sense isn't so common 👍👍

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #131 – June 13, 2023, 09:34:09 am

Quote from: Seven7 – June 13, 2023, 09:25:12 am

Do you have a part#/source for the coolant sensor? Thanks

Would reccomend going to cummins site with serial number for proper sensor.
This was a quick google search
4903489 Coolant Level Sensor For Cummins15MM11/QSK/ISX/L10/M11/ISM

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #132 – June 13, 2023, 09:40:04 am

Because my new rebuild ECM had a long prior life i really wanted a new one. They are unavailable. Cummins sells a rebuilt one and I found some China Cummins NEW ECMs and at one time considered buying one, since then the value of the dollar has caused it to go up a 1000 dollars in price. Mine does have a life time warrantee for what's that worth, but it is always in the back of my mind because of the hi mileage
Programmed Control Module ECM ECU 3408501 Cummins Engine Parts QSM11... They say this is programmable for my coach but who knows. $1700

I will say this there is many more availed today than there was when I desperately needed one. That's really good to see. The ECM I borrowed certainly added to my coach adventure being speed limited to 49mph. Good stuff

Programmed Fits Cummins ECM Engine Computer Module 3408501 | eBay

Contacted them and asked if they could program to my engine. They got back to me and said they could.. sound crazy but if I had a spare it might rally save my butt or possibly someone with a ISM. That being said haven't heard of anyone getting stranded by a ECM Failure in the past couple of years. $1300

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #133 – June 13, 2023, 09:50:23 am

The ECM thoughts brought back a vague memory of some youtube videos that were helpful to me when I had M11 trouble. A little searching and I found the guy.

https://www.youtube.com/user/terrychron

https://www.youtube.com/watch?v=Tff19vOqNXk

Cummins L10, M11 & N14 ECM Troubleshooting Tech Videos

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #134 – June 13, 2023, 09:52:48 am

If it does become necessary to swap out the coolant level sensor for a new one, sounds like this can be done without having to empty the reservoir tank. Found this post (Reply #4) by John Haygarth:

Stop engine light

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #135 – June 13, 2023, 09:54:22 am

While it is certainly possible that the ECM is the problem, zeroing in on that when they know they do not have good solid 12+ VDC to the ignition solenoid could lead down the "rabbit hole".

That is why I posted checking the Allison transmission for diagnostic codes (a 40 second process from the driver's seat). If it also shows voltage issues............

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #136 – June 13, 2023, 09:56:07 am

In order to bypass the coolant level sensor. You will need to know the diagnostic values. The wire may be 12 volts or more likely 5 volts. The sensor probably handles the 5 volts with a resistance value through the coolant to ground

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #137 – June 13, 2023, 10:03:32 am

Quote from: Chuck & Jeannie – June 13, 2023, 09:52:48 am

If it does become necessary to swap out the coolant level sensor for a new one, sounds like this can be done without having to empty the reservoir tank. Found this post (Reply #4) by John Haygarth:

Stop engine light

Just depressurization and swap it out wet. Loose a ounce of coolant.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #138 – June 13, 2023, 10:05:46 am

Quote from: Protech Racing – June 13, 2023, 09:56:07 am

In order to bypass the coolant level sensor. You will need to know the diagnostic values. The wire may be 12 volts or more likely 5 volts. The sensor probably handles the 5 volts with a resistance value through the coolant to ground

I recall its a capacitive system. Four wires to the plug.I spent hours in the books and tried every combination I could think of to cheat it. The guy helping me out ( Bubba) laughed at me at went and got one. Lesson learned, I carry a spare

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #139 – June 13, 2023, 10:34:58 am

Quote from: dsd – June 13, 2023, 10:05:46 am

Four wires to the plug. I spent hours in the books and tried every combination I could think of to cheat it.

Well, if the sensors all have 4 wires it becomes a bit more complicated. My "bypass" suggestion may end up being of little value. I was hoping they used a sensor where the liquid, depending on the level, just makes or breaks a simple 2-wire circuit.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #140 – June 13, 2023, 12:50:25 pm

Since they have silverleaf, Where does silverleaf get it's voltage reading from? Could it be the ecm?

It has been 20 hrs since we have heard from the Walkers. I wonder what is going on.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #141 – June 13, 2023, 02:49:47 pm

Quote from: FourTravelers – June 12, 2023, 08:09:17 pm

Siobhan
Understand that this is a totally different problem but I thought it may give you a little hope for a good outcome. Three years ago we were stuck with a non moveable coach, fortunately we were at a National Forest campground but were being forced to move because our site was booked to someone else. The day we planned to leave the Alison shift pad was totally blank, dark, nothing and no warning. It would start and run but no go! I had made plans for a tow and booked a flight for my wife and son to fly back home. I was going to have the coach towed to a RV park with hookups for a week while waiting on the shift pad to be repaired. I would then drive the 525 miles back home a week later. But, a week later I would still have the same problem, it wasn't the shift pad.
Total cost was going to be $2000 - $3000, with the tow,campground fees, shift pad repair and flight for two back to Florida.
I kept trouble shooting asking questions here on the forum.
The fix? a broken ground wire behind the fiberglass panel in the storage bay next to the inverter.

Here is the link from 3 years ago.
Need Help...... Allison Keypad, dark.........

Keep your spirits high and never give up.

This is really encouraging! Trent is literally going through the whole coach with a fine-toothed comb looking for the little things that could cause silly problems like we're having. It seems like there is just something that's creating little gremlins in the whole system. The engine itself looks and sounds completely normal when it's running, but it gets shut down. We will get it figured out. I hope it's something small like yours was. Sorry you had to go through all that trouble because of a ground wire. I feel like we would get it towed to a shop and they would be like, "Did you turn it off and back on again?"

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #142 – June 13, 2023, 03:52:14 pm

Put a voltmeter on an ignition source and in my coach I would use the source at the rear of the
coach where you can start and stop the engine and see what the voltage is and then start the
engine from there watching the voltage the whole time and see if there is any changes.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #143 – June 13, 2023, 04:30:11 pm

If you would identify your exact location, I may be able to find you some help.

jk

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #144 – June 13, 2023, 04:48:02 pm

Quote from: oldguy – June 13, 2023, 03:52:14 pm

Put a voltmeter on an ignition source and in my coach I would use the source at the rear of the
coach where you can start and stop the engine and see what the voltage is and then start the
engine from there watching the voltage the whole time and see if there is any changes.

The problem is they have a digital voltage meter. I have seen many that are not real quick as showing updates to voltage change, so getting good number is very hard compared to the old analog voltage meters.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #145 – June 13, 2023, 04:57:21 pm

UPDATE: After my dad came to pick up me and my youngest 4 boys yesterday and I had my pouting session because I was mentally exhausted from the whole ordeal I got a call from Trent that he had gotten the coach to stay running for at least 10 minutes without shutting down. The alarms and lights were still going off but the voltage was good so he limped it back to my parents house an hour away and we have been here ever since continuing our clean-up job (really focusing on grounds and connections and such). It's much less stressful here. We are bummed that we are missing our trip to Chincoteague Island but we can hopefully go at a later date and we are still sleeping in our RV even though we are at my parents' house because that is where we feel at home. I'm done pouting now and I feel safe now that we aren't on the side of the road. I truly have a rockstar of a husband and I know we will get this figured out. If the moderators ever decide to have photo headers for the different forums here feel free to use this photo for Foretravel Tech Talk

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #146 – June 13, 2023, 04:58:42 pm

My volt meter for the coach batts , fed from solar, drops a tenth or 2 in an underpass .
So it's plenty fast in my case .

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #147 – June 13, 2023, 05:01:49 pm

Big thumbs up as it's not the expensive ECU!! Engine codes should point the way to the problem.

P

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #148 – June 13, 2023, 05:20:23 pm

Great news! So glad to hear you got your coach moved off the highway shoulder and to a safe parking location.

We would really appreciate hearing the "end of the story" when you solve the riddle. You can either occasionally update this thread, or start a new one.

Re: Stranded on an exit ramp - Stop Engine and ABS lights

Reply #149 – June 13, 2023, 05:28:40 pm

Quote from: Chuck & Jeannie – June 13, 2023, 05:20:23 pm

Great news! So glad to hear you got your coach moved off the highway shoulder and to a safe parking location.

We would really appreciate hearing the "end of the story" when you solve the riddle. You can either occasionally update this thread, or start a new one.

Yes! We will keep you all updated!

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