Jeep Grand Cherokee Air Suspension Fix
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- čas přidán 27. 02. 2023
- This is how I fix the air suspension that wouldn’t go down. This may be the same for other Dodge, Jeep and Chrysler products. Other makes and models may be similar.
- Auta a dopravní prostředky
Thank you for sharing this is the best video on CZcams about the suspension
Good job trimming the hose going to the press-loc on the pump. That's a common leak point many people wouldn't think to trim. The brass connections on the manifold block are called compression fittings. Glad to see you figured it out and helped others troubleshoot. 👍
im italian and i see your video with max attention... many many many tank. I can tell you that you are a very special person. You're a good person. May you have a long life for the care with which he made this video. Excuse my not very good english
Fantastic video it explains alot and now I have a better understanding
Thank you
Thanks for showing how you fixed the problem. I have a 2015 Grand Cherokee jeep thar just came up with the error message. Its going to be harder for me to work on it since i have to do laying on my back. But now I know what I am up against.
Thanks for posting this video! Was having the exact same issue (GC would raise just fine but wouldn't go down below normal ride height and had frequent "service air suspension immediately" messages) and likely would have followed the same path of replacing the valve block first if I hadn't seen your video. I was unaware of the reversing valve on the pump. Replaced the pump and refilled the tank with UHP nitrogen and now the car will go both down and up like it is supposed to.
Glad it helped
Excellent video I wish you had a video of disassembling the pump from the valve body
I have a 2017 with same Quad Lift system. Had an air leak was cracked air line to front strut. Ended up getting 90 degree connections to strut and air line set from Mopar. RMT doesn’t sell the air line. Where air line fits to strut it’s flared. Straight hose won’t connect
Just purchased a 2017 Summit with 28k mi. Love it, but its our first Jeep and never attempted an air ride fix, and wanted to familiarize myself with it should we see any symptoms. Subbed! Keep the Summit/Jeep content coming! 👍
what size o rings did you use and why not use the press fit that came with the new unit?
do you have a video where you replaced the compressor unit also?
In my case it only not comming down from off1 to normal.All others is ok.It comes down from off2 to off1,but not in normal.Only rear.Any idea?
Thank you so much for this information. I have a 2013 grand cherokee 5.7 , 1st the front was struggling to lift and i was advertised to replace the schocks which were indeed warn. Now the compressor doesn't run at all. I've checked the fuses and relays but all seems good. I haven't regassed it yet. I need to drive it to the dealer to get gassed. But why is the compressor not running 😢
That’s hard to say without a scanner on the system, possible it’s the controller. But I wouldn’t jump to conclusions without a scan.
So when you unscrewed each fitting from the valve block, did each bag lose its air? I keep hearing how these and the 90* fittings are an easy fix for leaks, but nobody talks about if the system holds air while you have bits unplugged, which if it dumps, requires a nitro refill which isn't readily as quick and easy for the average joe to do.
Yes, the bags will deflate when the fittings are removed. If you can’t or don’t have nitrogen you can use air from a compressor and it will work fine but remember air has moisture in it and may cause issues down the road.
I wonder how common this problem is a friend of mine just bought a 2020 and is having issues Less Than 3 weeks after buying it
Did you have to decompress the system prior to starting the project and removing the compressor unit ?
Also, how did you know what the final pressure should be when filling the tank? Did you cycle the height while filling the tank
I did not decompress the system, I pulled the line and let the pressure out. I checked the pressure before I started and put that much back in.
Question, I have a ram 1500 that has two of those tanks, under the truck. Does the Jeep have two tanks as well? I'm trying to determine what size tank I need and how much nitrogen needs to be in it in order to refill my entire system because I have to replace both the air compressor and the distribution block. Thanks
The dealer quoted me $4,800 to replace the air compressor and the distribution block. I bought the air compressor and distribution block from RMT for $400 plus core. I'm not a full-fledged mechanic, but I've done plenty of work to cars, so I'm hoping it's not too difficult. I also have access to alpha ODB to do any additional settings.
The Jeep only has one tank as far as I know, but if you got a small nitrogen tank it would be plenty..
@@Nelsons-Garage thank you!
@@m3rdpwr Have you guys had good performance from the RMT compressors ?
@@JR31622 RMT sold the new compressor and block for $500. Remanufactured was $400 plus $100 core charge that is refundable. When they had run out of new ones, I asked about the quality of the old ones. They say they're every bit is good as the nuance. While that doesn't tell me enough, when I looked at the new pump assembly, it looked brand new. Finally, I ended up just buying the temperature sensor and spent an hour's time and it fixed my problems for $40. I learned a valuable lesson and now have an air compressor sitting in a box on used. Lol
Once you refilled the system, did you need to make any software adjustments any proprietary software required to get the system back in functioning order?
I noticed another video showed some kind of Jeep/ Mopar scan tool/software required to re-pressurize the system?
I did not make any software adjustments. I filled like i showed in the video and that was it. after, i connected to a scanner to clear any code that were caused from the pump valve issue. but that is it.
Did you have to decompress the system prior to starting the project and removing the compressor unit ?
What was the fitting used to put the nitrogen in the driver side back seat tank? Where can I get that fitting 24:19
I used an AC gauge set(Harbor Freight) and the larger AC fitting fits the tank.
Hi, I have a 2019 summit with similar problem. Jeep goes up but front drivers side goes down almost to the ground. Just ordered full strut assembly for that side. Is that a good way to start or do you suggest trying something else first?
Most likely a leak, first I would check the air fill line on top of the strut, under the hood. Those are known to leak. Then the lines and then the air bag/strut itself.
Hi, what code did the ascm put out when you had that problem? Mine sometime work, sometime it goes up but dosent goes down and you hear the compressor forcing more, rear wont go down. Mine trow the usula c15a1-00 , 1562-98, 1556-96, 1566-92.
Dealer diagnosed a bad valve block….. stating if it dosent fix compressor will have tonbe changed. Ordered a full RMT unit .
Also im not losing height at all and airmass always check okay when i check it with jscan. Also get the the compressor orverheat / cooling down, never blowing fuses tough
Mine Threw several code, C15D-00 Low air mass, C159E-15 air pump temp, C15A0-13 Air reverse valve 2, C159F-13 Air reverse valve 2, C15A1-00 Unable to obtain desired ride height, C1562-98 Ride height air pump control.
@@Nelsons-Garage thanks mine didnt trow the reverse valve , but im not gonna gamble and change both even tough delaer said valvle block
Thanka
Where are air line connects to front strut the air line had a fatter portion about 1 “ from end
Have you had good performance from the RMT compressor?
Yes I have so far
where'd you get the ac lines used for the setup that come on the hook?
Harbor freight
my official jeep estimate was to change the compressor and control unit for 3000 dollars but they didn't understand that when the cars are out of the official guarantee these are prices that only thieves can afford
Yeah the dealership quoted me 5k to have the compressor replaced... After they filled the system with 100% air after a service... I told them to fly a kite
I had the same problem and then it just started working a few days later and its been fine since
Mine did the same thing, keep an eye on it.
Thanks for a great video! Not much else out there for information on this subject. I was wondering if you had any advise for my current situation. Initially had a leak on the fittings at the top of the front struts. After replacing these fittings this I noticed the front would not raise and I blamed low nitrogen (closed system?) I filled the system, and using AlfaOBD scan tool I am able to adjust rear springs but not the fronts. I replaced the compressor, but same issue. I have now replaced the valve block and still have the same issue. I can hear the compressor struggling to pass air into the front struts and then it turns off and fails the procedure. Any suggestions on diagnosing this? Thanks for the help!
That is odd, I’m sure you did this, but, there isn’t a kink or obstruction in the front lines? I’m thinking where they go to the distribution block.
@@Nelsons-Garage No kinks in the lines… I have narrowed it down to the connections on the top of the front struts. If I disconnect them and actuate the compressor, air will pass through but as soon as I connect to the brass fitting at the top of the strut it is blocked. Do you have any insight on this?
@@diigiianR no insight, other than making sure there is no obstacle in the valve. (Obviously) I would use compressed air to test each air bag. I think they come plugged, so making sure that is clear. Keep me informed what you find.
@@Nelsons-Garage UPDATE: My issue has been found & fixed. After testing for air flow with the lines disconnected from the front struts, both worked correctly. This made me suspect the residual pressure valves. I swapped the RPV's left to right and the issue traveled. Replaced the one bad RPV and flow was restored. I had to recalibrate the suspension, but since I did not replace any height sensors I used some numbers suggested by a jeep mechanic. Its driving normally today and I'm happy to be out of the woods with this repair
@@diigiianR that’s great, good information..
My wifes jeep displays service immediately. Goes up and down fine, does not leak as far as i know. Dealer said the compressor and module are fried. Light only comes on on the highway. Anh idea's? Thanks! Great video
Its hard to tell without a scan, but the suspension does go down in aero on the highway. if this doesn't happen in a timely manor it would display the service immediately. This is tough to guess at, but i would first check the links at each control arm making sure they are not loose or broken. otherwise, it sounds as if the compressor is doing its job going up and down and the module is communicating to the compressor. the only thing would be time, if the compressor runs too long, the service light comes on. leading me towards the compressor and the valve within the compressor becoming slow or leaky (inside the system). I would think through time the service light will start coming on more frequent. this is all just a guess without a scan.... good luck and let me know what you find.
Wow! Super fast reply! I will dig into it today a little more. Super frustrating.
Good day, everyone!
I have a question: do you have any idea how to bypass the computer system of a 2012 Jeep Grand Cherokee Limited? What happened was that we changed its front suspension to a spring. At first, it was doing well, but after a few days, the car wouldn't run or reverse. There is no problem with the transmission.
I have never bypassed the computer for the suspension. I know people have done it when the replace the air system with springs. let us know what you find
My yellow light in auto does not light up
My 2013 Jeep overland is stuck at exit level .. how much is the part you had to replace
At the time it was under $300, you will have to give RMT a call
Awesome explanation of the process and how it works! My 2014 Summit just did the same thing this morning. Ran all morning on the way to work and wouldn't turn off trying to seemingly correct an issue even when I turned it off. I found the 40a fuse pulled it out so it wouldn't unalive itself and my battery like it did my 2011. Reinserted the 40a fuse now it won't turn on at all. I only assume a new compressor is to be had. Would be great to know if my valve system worked and I just needed the pump, "woe is me". And you're correct RMT is great company that deals with Chrysler products I purchased their copper fittings for the lines awhile back just now ended up using them a few months ago. My question to you, I'm iffy but willing to learn to use the nitrogen tank to fill up the tank on board the jeep so I don't rely on the dealer anymore. Where do I buy the tank and the couplings ? I've looked up a few places online already that look promising but what happens when I need to store the rest I don't need after I fill it up? Is it safe to store in a basements or garages and such?
The fill gauges are just an AC fill gauges from Harbor Freight, as far as the gas and tank, go to a welding supply store. And it is perfectly fine to store in a basement or garage.
@Nelson's Garage thank you sir appreciate the reply
One more question if I may, you mentioned when the airbags are empty you filled the tank. When the bags are empty is the jeep at its lowest setting, entry/exit? Or did you have it on a lift with the wheels and suspension free of its weight? Or did you purge the system completely and just filled up to 120psi of nitrogen? Sorry to be so anal with the questions, I just wanna do it right like you did.
I had the air bags as empty as possible. My system wouldn’t go down to park mode anymore, but when you take the pump out one of the lines goes to the tank. Any pressure in the tank will come out then. And I did all of this on a hoist, there may have been some residual nitrogen/air still in the bags. But the system isn’t that picky.
@Nelson's Garage awesome thanks again!
excuse me, I have my jeep air compressor works at each morning for about 15- 60 seconds, is that normal ?
one mechanic told me it is normal for the compressor to adapt to low pressures in cold weather at morning.
thank you again for explanations.
No, the system shouldn't have a pressure difference due to temperature. This is why there is nitrogen used. Nitrogen doesn't contain moisture like air so it doesn't fluctuate pressure with temperature. If you used air to fill your system, then yes i could see that happening.
@@Nelsons-Garage amazing information, thank you ..
I dont know my system is filled with air or nitrogen , but one time the mechanic deflated the front air springs both , without replacement, so I thought that the compressor itself had filled the deficiency, for sure by ambient air.
so that means if I dont have a leak, and I filled the system by nitrogen, I would not have fluctuations in pressure in the future.
@@hassanmahmood661 Correct, the system is designed to pull outside air IF the system went low on nitrogen.
@@Nelsons-Garage thanks alot.. and forgive my poor language sir..
I have exactly the same problem
Should I replace the motor or the valve block????
If it goes up but not down, it’s the pump.
Did you purchase the nitrogen tank ? If so how large was the actual tank in volume.
Not very big, about 18” tall and about 8” diameter.
I did purchase, but you can rent cheaper if you are only going to do this once.
there was a leak discovered on the elbow valve of the left front strut that made my car sag too much at each morning from rhe front , had it repaired successfully , but still have a much less leak thought because the compressor keeps running for a while at each morning ...
can i catch it and make the air circuit completely sealed without a leak ?
The system is designed to be sealed completely.
@@Nelsons-Garage thank you for replying, but can a leak be from the valve block ? and how can it be discovered ?
@@hassanmahmood661 Yes, the lines going to the valve block can leak. If it’s a minor leak and you can’t hear it, I would take soapy water in a squirt bottle and spray the area of the lines and watch for bubbles. You can do this anywhere a joint is.
@@Nelsons-Garage I'll do it, thanks again ..
Hello.....on 2014 GC Summit i'm getting a 'service air suspension immediately' warning on the dash....not noticing any malfunction....were you getting the same warning?....i'm trying to figure out what a service to the air suspenstion is all about.
Yes that is the warning. The pump is running too long causing the thermostat to trip, which, in this case, trips the warning. Is you pump working and the suspension is going up and down?
@@Nelsons-Garage ...yes it seems to work as normal......entry to aero seems fine....
Hummm, when does the warning come on? If you put it in off road 1 or 2, does the Jeep go up all the way? Then put it down to park mode, will it go down all the way? Make sure the pump is running.
@@Nelsons-Garage .....ive got the dial selector....auto, snow, mud, sand and rock which seems fine but the jeep barely moves up ot down when im in park so guess its the compressor....the warning happens on the road when i get up to speed....
@@johntrainor9101 the pump valve is starting to go. Same thing happened to me. Mine started once in a while then slowly became more frequent. If it happens while you are getting up to speed means the Jeep isn’t at the height it wants to be and the pump is taking too long to get there. When the warning comes on the suspension no longer is working until you restart the Jeepz
How is the rebuilt compressor holding up?
Holding up like a champ so far…
My English is not very good. But here is my question. I have a big 2014 Cherokee overland and it happens to be lowered from the front end. but he told me that I should check the automatic suspension quickly. So I took it to the dealer. Well, they changed the compressor and an air suspension on the driver's side, that was in January of this year. This week it went down again. Now I took her and they changed the passenger side. but he went to another place because the dealer gave me a bad experience because they had my car for 3 weeks. On the other hand, wherever I took it, in 2 days it was ready when the piece arrived. but they gave it to me and it says that I should take it to the dealer to reset the computer to read the new part. This is true?? Because the car is still down and on the dashboard it only shows off road 2 but it showed the same thing when we took it. And now I do not know what to do. Well, I have already adjusted the normal mode but the lights keep blinking to go up or down. And I don't understand, it already has new both sides of the suspension and also the Compressor and the pump. I hope you can guide me
If the height sensors were changed it is possible that the computer needs to re-learn those sensors and the height that they are at and the height they should be.
Gr8❤
On mine going up or down there is a arrow on top of dash
The car is taking too long to go up. It needs more nitrogen in the tank. Did you purge the system after changing the valve block?
I did not surge the system, I just let it empty. I put pressure in the tank, filled the bags to ride height and checked the tank and topped it off.
@@Nelsons-Garage how much nitrogen did you use?
@@RCandFishing I think it was around 120psi,
@@Nelsons-Garage I gonna need to do the same thing to mine. It's crazy that the only jeep dealer we have in an Island where I live doesn't do nitrogen refills 🤣. 200 psi of Nitrogen cost almost $600 here.
My 2012 jeep grand Cherokee overland is slammed down low and won’t move at all. Bad compressor? Or could this be from something else?
That’s hard to say, is there any warning on the dash or codes? Can you hear the compressor running when you try to move the suspension? First thing would be to check the fuses and relay I think there are 3 of them.
@@Nelsons-Garage ok update. Got the codes cleared on the jeep and the suspension is working now. Could this indicate a leak?
@@Witchy___Womannot necessarily. You will have to see how it reacts as you drive / park it.
What kind of nitrogen i have to use to refill the tank?
I didn’t look for a certain grade , I just went to a weld shop and got what they had.
How long did this job take?
Not that long, couple hours..
I have a 2014 amd my back bags are deflated and dont pump up what do you think my problem is
its just a guess without a scan done on the system. but start with leaks, checking the bags and lines for leaks, (from the valve block to the bags) each bag has it own air circuit but they both need to be checked for leaks. do that by trying to air up the suspension an listen for the leaks (sometimes you can hear the leak) and a visual inspect of the lines and connections. next would really need a scan to make sure the computer is calling for the rear to be inflated. if it is, it could be the valve block (there would be a code). you see if the front will go up and down, that tells me the pump is working properly. it would have to be a leak (n both rear bags or lines feeding the bags), the computer controlling the valves to fill the bags or the valve block itself.
With all that said, make sure the fuses are good, i think there are 3. and the height switches (links) located near the bags are hooked up and not broken.
I have the same problem, should I replace the compressor?
If your suspension goes up but not down, it is most likely the reversing valve within the pump. So pump replacement would be needed. I haven’t taken the pump apart so I’m not sure how to repair just the valve in side the pump.
Thank you so much
My 2012 just started doing this. I can get it down okay, but after driving it goes into mode 1
I have a 2013 overland and the same thing happening to mines but it actually dropped the car to exit level any ideas because I’m not sure it’s the pump I drove it home with no problem woke up went outside and it just happened
If the Jeep goes to exit level but won’t go up it would most likely be the pump. There is a valve in the pump that switches to make it go up or down. If that valve is stuck, the Jeep will not go up or it won’t go down depending on what position the valve is stuck. Just make sure there is no leaks in the system, air lines, air bags. Usually if there is a line or air bag leak it will only affect that one corner of the Jeep. Hope that helps.
@@Nelsons-Garage thank you so much
@@Nelsons-Garage another ? It’s currently at the shop they say it seems like the pump is on but just because the pump is on doesn’t mean it’s working properly right he’s also saying they are only getting rear codes
Yes, just because the pump is running doesn’t mean it’s working properly. Usually if the pump runs and the Jeep is not going to the position it wants, the pump will overheat and cause the message in the dash. The cause can be the reversing valve in the pump itself, a broken line, a leaking air bag itself, or possibly the height sensor at the axle. Make sure the sensor links are not broken or loose. Also you mentioned it was in exit height, is that really where it’s sitting? Or did the air come out of the system? I would think if it’s in exit height and it won’t go up, but the pump tries to go up, and then the error message in the dash trips, I would go for the pump. Ask the shop if they see a switching valve error in their scan tool.
@@runituphotty216 one more thought, rear codes make sense. The system tries to lift the rear first. Not the whole Jeep at once. When lowering, it lowers the front first. So it there is a rear code it most likely will be the pump because the switching valve is not allowing air to transfer to the rear therefore the rear isn’t lifting causing a code there also.
I have a 2014 summit, same light problem, the front of the vehicle is lower than the rear, I went to the garage they told me to replace the air suspension module, do you think the problem will be rule ? and where is the module in the car?
Lower in the front could be the module, which is located under the driver seat. Just make sure to check for leaks in the front lines and air bags.
@@Nelsons-Garagemy front is in low and rear in off road2 all 40 amp fuse seem good changed one burnt fuse that showed good.
Can you help me with some issues I’m having or my best guess you won’t answer ?
What’s the issue
Hard to explain super cold car is slammed on rear and up on front now in heated garage no help seems the pump isn’t running upon start.
Then throw service immediately light.
But I hear it making some sorta noise befor light goes off
What’s the link to parts place you mentioned
Can I switch out relay with fan relay ?
@@HowsyourBin you can switch relays to test the system
@@HowsyourBin rebuildmastertech.com/?gad_source=1&gclid=Cj0KCQiA-62tBhDSARIsAO7twbZPNNZzBoSToGGYDDv_j8fwAUvlmDDV6GKGTRQZJs9ejSy6F8OAF_AaAvfHEALw_wcB if the rear is down and the front is up, it sounds like a leak in the rear bags or lines. The pump may be trying to pump the rear up and taking too long causing the pump to over heat and shutting off which triggers the service light to come on.
I have a problem where the left side front sits higher than the right side front
Check the valve on top of the strut/ airbag under the hood the right side could have a leak. Check the level sensor on both sides, that is located in the wheel well and has a small rod that connects the sensor to the suspension. Make sure the rods are connected.
One more thing when I stop I keep hearing my pump and air tank adjusting the suspension
@@luhjay345 that sounds like a leak somewhere, check the valves on top of the front shocks
I checked that already and I put a new shock on the right front because I that that shock was bad. I made sure that valve was on tight and theirs no leak from that. But can say it don’t sit low to the ground no more it just sit lop sided in the front do u think It’s leaking from the valve where the pump at that say right front
@@luhjay345 it’s possible the the valve block is leaking down but you may have to hook up to a scanner and reset the ride heights.
Thanks so much for posting this. Recently got the dreaded "Service Air Suspension System Immediately" warning on our 2014 Jeep GC after weather dropped below freezing. After reading these comments I think I know where I messed up. A few months ago did a fix for the leaking 90 degree fittings on top of the front struts and likely leaked them out. Also didn't refill the pressure tank. Do you think water could have gotten into the system and froze something up?
Just for reference this Dorman installation video was informative. Talks about using a bidirectional scan tool to depressurize the system, and check pressure levels after installation. Of course they are pitching their compete pump and valve body assembly.
czcams.com/video/r_UtE9o6gPA/video.html
I'm having he same issue with my 2014..... cold weather and the front end settles down....if it warms up a few degrees it's back to normal.
@@darickymeister The weather warmed up yesterday and the code went away! My shop mentioned this could be caused by bad battery so I changed that as well as it was 5 1/2 yrs old. Pulled codes using jscan and it showed C15AA-00 "air leak during vent" and C1562-98 "ride height air pump control-component or system over temperature". Looks like it has a leak somewhere.
I have the same issue… following your video closely… thank u… do u want to exchange channel mentioning?
Sure
@@Nelsons-Garage ok… I will check out your videos to see what u r doing and will mention your channel in 10 videos of mine…
@@Nelsons-Garagehi, I mentioned your channel and this video in a short of mine on this problem… please, see if it’s showed up in your comments…
Hello, I have my 2018 GC HA around 96000 miles I got this warning, took to a dealer they replaced the valve block for 1800$ and said the problem is solved I paid and checked my car it was not solved. They took it back immediately and checked 4 days and the issue was not fixed, when I questioned, they came back with 3400$ estimate for a possible compressor replacement. 😣 they mentioned that they took a less price route to replace valve block, I don't understand how these dealers service department cannot figure if it out before hand. If a valve block or compressor valve was causing it and they call it a world class inspection. 😢
Have to figure out a way now.
Some times it works fine but it keeps coming back. No fuses were blown out ever.
Auto/Park mode while lowering is where the service code was triggering from what I understand.
Hope this will get figured out for you. the valve block controls each corner of the suspension (sending the up and down air to each corner), the pump has a valve that controls the up and down function. if you are randomly having this issue it will be a matter of time when the pump will need to be replaced.
@@Nelsons-GarageI got it diagnosed with an outside mechanic and I was given codes- c15a1-00 and c1562-98. They mentioned that they cannot repair at a third party service - they need to calibrate with the systems, which would be at the dealership only. How did you reset the system after replacement?
@@Vishnuroczz there was no need to recalibrate the system, just clear codes, after install.
Great video. I own a 2017 GC with 100k. Dealer is quoting $5400 plus tax for the repair including the air suspension control module and the compressor. This seems like robbery.
Question: how did you decompress the system before starting?
Did you have to reprogram the system with special software or a device one the new compressor was installed and pressurized?
Finally where did you find the nitrogen tank supplier ?
Thank you !
@@afcase I didn't do any thing special to decompress the system, i just unhooked the lines. After the new compressor was installed, i did not do any reprogramming as the system knows where it should be do to the height sensors. The nitrogen was from a local gas/weld supply company, i used Air-Gas company.