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Discussion Starter #1 (Edited)
Pumping or Gear turning noise while off/parked and plugged in.

We have been noticing that the Hybrid has a low pumping noise that seems to come from the center of the dash board when the van is parked and charging. When I turn on the van the noise stops. It seems like this noise only starting happening recently Dec. Jan. and I am wondering if it is related to warming the battery or some other maintenance system keeping the oil circulating. I took a video that has the noise but do not know if we can upload a video here. There are no warning lights and the van seems fine otherwise.

Anyone else notice a similar noise from near the dash?

I have yet to try and document if the noise also occurs while not plugged in yet.

Edit.

I had U73 done in Dec. and never noticed the noise before that.
 

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If I had to guess I'd say it's the electric coolant pump for the battery, circulating coolant either to warm the battery when it starts out cold, or to cool it as it charges.
 

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Yup, got the exact same issue with mine, and Just like yours , started happening couple months ago.. sounds like an inkjet printer cleaning it's head. Only happens after car turns off. I have not taken to dealer yet.. and I don't notice any other problems with the venting and heating yet.. it's rather annoying to hear sometimes, but I have got a host of other issues that keep me entertained.


Youtube video of pumping noise. May need to turn up your volume.

https://www.youtube.com/watch?v=42LQdCd4Pp0
 

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Just wondering, what level charger are you using? I’m guessing you have a level 2. I haven’t noticed this noise on mine but I do notice that when using a level 2 charger, the battery cooling system is much more active (fans run). Just wondering if a level 1 causes the same noise.
 

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Yes using level 2 charger. Interesting point, as I did get a faster 6kw charger for home. However, I charge at work as well and it's also a 5.7kw and have been doing so since I got the van. So don't believe they are related.
Oh and one other note is I hear it even when. I'm not plugged in, and just after turning off the power. As OP said, only happens while power is off, and as soon as van is powered up, it stops
Just wondering, what level charger are you using? I’m guessing you have a level 2. I haven’t noticed this noise on mine but I do notice that when using a level 2 charger, the battery cooling system is much more active (fans run). Just wondering if a level 1 causes the same noise.
 

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Discussion Starter #8 (Edited)
Update:

I have been trouble shooting this for 4 months now. Here are my observations:

1) Happens when charging and also sometimes when just turning off the car and not charging.
2) I have used level 1 EVSE and 3 different level 2 EVSE chargers ranging from 16-32 amps and the sound happens on all of them.
3) I have started to hear the noise rarely while driving but it is intermittent and seems to be loosley related to the Air Conditioner because I can change the noise speed by turning on/off the AC while it is happening.
4) Just starting in April 2019 I get a MIL light that will stay lit for hours then then turn off and this has repeated itself for 2 weeks now.
5) I checked the code using OBDII scanner and discovered a Battery Heating System Error. I will post actual code (UPDATE: U1124 OBD2 code) next time it appears but I googled the code and others have said it is not critical and they continued to drive until they could get it looked at.

These symptoms make me think it is indeed a problem with the EV battery cooling pump like mentioned above. I am going to have the dealership look at it in May. I will post updates as I get them.
 

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I have had the same noise a couple of different times so far. I'm at 17,000 on a 2018. The first time was in the drive through. It did stop when I turned off the AC. I'll post my video as soon as I can locate it.

Sent from my Pixel 3 XL using Tapatalk
 

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For a while I was hearing it almost on a daily basis but it seems to be happening less now, or may I just don't notice it anymore. I mentioned it to my service rep(being serviced for the V15 recall), but I have doubts that they will be able to root cause it.
 

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Youtube video of pumping noise. May need to turn up your volume.

https://www.youtube.com/watch?v=42LQdCd4Pp0
I just chased this down in my vehicle.

The noise in the video is 100% servo jitter aka glitch. It is coming from the right footwell, theres an air-door actuator (which is a servo) that opens and closes the air ducts and directs the air flow..

Once the Key turns off, the HVAC module powers down and this is when it starts glitching. After several minutes it goes to sleep and stops. Seems everytime the vehicle wakes it glitches away until its powered up or goes back to sleep.

Mine just started this summer. Was even knocking at one point which made me investigate. Seems the knocking occurred with the flap open a little more than usual so it had more free movement.

Lay in the passenger foot well, look up and find the air duct (it comes out with the 2 screws but doesnt need too) and just above it to the center of the dash you’ll see the air-door actuator, and can feel it jittering or glitching.

Unfortunately even with TechAuthority access I cant pinpoint the function for this specific air-door actuator . It looks like it belongs to the passenger footwell vent?


Because it jitters or glitches when the climate control turns off, but before the van sleeps.. it seems the signal line is getting noise like this next video.. more so then a coding problem.

Should try pulling the fuse for the system and see if its better too.

 

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Discussion Starter #13
Update

We have not had time to take the van to the dealership yet. Since we received the ball-joint recall we are going to try and get both done at the same time in July. I did want to update the post because we have some new observations.

1) Ever since the weather in South Texas got warmer we do not have the MIL light come on for U1124 code.
2) The noise still happens but is more noticeable while driving or idling. It still happens when parked/charging sometimes.
3) m0ebius604 states his noise seems to come from passenger footwell. My noise seems to come from the center of console near charging light. I will have to listen closer from passenger footwell to verify location.
4) I have been testing by parking the car but leaving it running with the AC on. I can hear the noise start and stop after a period of time so this does seem to be related to heating/cooling.

I am wondering if there is some sort of heat exchanger that is used between the battery system and climate control. This would explain why the noise happens while the car is off/charging as well as on.

If anyone does get this resolved with a dealership please post your experience. My dealership has very little experience working with hybrid systems.
 

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3) m0ebius604 states his noise seems to come from passenger footwell. My noise seems to come from the center of console near charging light. I will have to listen closer from passenger footwell to verify location.
4) I have been testing by parking the car but leaving it running with the AC on. I can hear the noise start and stop after a period of time so this does seem to be related to heating/cooling.
The Noise in the dash sounds the same as mine.

But mine only happens for me when the vehicle is woken, or turned off.. Never happens when On or running.

When your charging the vehicle is awake.

I’ve attached some pics to help you see if its a match for you. I touched the actuator and it is the source.

But to have that noise when the vehicle is On or driving - in combination of the fault suggests you have two problems or somehow the systems are related?

I am wondering if there is some sort of heat exchanger that is used between the battery system and climate control. This would explain why the noise happens while the car is off/charging as well as on.
Yes have a look.



https://www.dropbox.com/s/41rb58pwc8jwl2o/HV Battery Cooling.pdf?dl=0
 

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Today sitting in traffic planning my day with the volume at 6 on the radio, it was silent and then the servo glitch started occurring with the system on. This time it sounded from the Drivers footwell area.

This is the fist time its occurred with the vehicle in Run. The mode was in Auto and the AC was active.

I pressed the off button and the noise stopped, then pressed Auto again and it remained off.

Suspicious of the control module - I’m going to scan my vehicle with wiTech and see if I can update the climate control or reload the software at the min and see how things change.
 

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Suspicious of the control module - I’m going to scan my vehicle with wiTech and see if I can update the climate control or reload the software at the min and see how things change.
As posted in the other thread, heres a graphical view of the noise seen in wiTech 2.0.

Unfortunately theres no flashes available and I wasn't able to reset the control unit from tester.

I’m going to powerdown the 12v to reset the control module and see if this has an effect

Ignition OFF

Ignition ACC to RUN
 

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Discussion Starter #18
I have confirmed my noise is coming from same location m0ebius604 posted in the pictures above (passenger side footwell area). When sitting in the driver's seat the center speaker grille seems to transmit the noise but if you move your head over to the passenger side, it is very noticeable. I tried to feel for a vibration that matched the noise and I found it was coming from the area m0ebius604 circled in red. I have still not taken the van in for recall/service so I am hoping someone finds a solution here first. I do not have confidence in FCA techs resolving this if there is no CEL/trouble at the time of service.
 

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I have confirmed my noise is coming from same location m0ebius604 posted in the pictures above (passenger side footwell area). When sitting in the driver's seat the center speaker grille seems to transmit the noise but if you move your head over to the passenger side, it is very noticeable. I tried to feel for a vibration that matched the noise and I found it was coming from the area m0ebius604 circled in red. I have still not taken the van in for recall/service so I am hoping someone finds a solution here first. I do not have confidence in FCA techs resolving this if there is no CEL/trouble at the time of service.
Hi blhx,
We understand your hesitation about visiting your dealer for further diagnostics. Your safety is our biggest priority so we encourage your to visit your dealer for any outstanding recalls you may have. We would also like to assist with this as well. Please send us a private message at your earliest convenience.

Lydia
Chrysler Social Care Specialist
 

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I have a similar clicking noise (like grinding?) when the car is in idle with climate off. The noise is gone when in driving mode or turned off. I am typing this post while waiting for the technician to diagnose. The tech wants to compare my van with other hybrid to see if it is normal. Will update later.
 
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