Active Grill Shutter No com

Lazer Mobile Technician New Jersey Posted   Latest  
Resolved
Electrical
2018 Chrysler Pacifica L 3.6L (G ERF) 9-spd (948TE)
U11E9
No Com

Hello, I have a 2018 Chrysler Pacifica with a code for no com with the active grill shutter. have power and a ground but when I plug the module in it grounds out the LIN line. I checked continuity between pins 1 (ground) & 2 (LIN) on the module and there is 0.3 ohms. Got a new module from Chrysler and the same thing! Now I'm doubting myself how can a lin be shorted to ground? What am I missing or can it just be 3 (the one on the car was changed before this shop got it) bad parts?

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Carlos Diagnostician
California
Carlos
 

I found the problem on those was corosion on active grill connector water drips inside and causes the green crud has a few of these.

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Lazer Mobile Technician
New Jersey
Lazer
 

Thanks Carlos, but here I checked resistance on the actual module.

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Carlos Diagnostician
California
Carlos
 

I did like 5 all where the same connector in the middle under grill lin bus shorted ohm meter not going to show problem

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Martin Technician
California
Martin
 

Do you have identifix. I just looked up the code and found a tsb for water intrusion in the connector of the grille shutter. There is an updated harness and reroute. the TSB # 08-133-18. they also show the main fix for the code you have to be the grille shutter. Because couldn't the grille shutter be what is actually grounding out your bus network and not the module. Based on the diagram you…

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Lazer Mobile Technician
New Jersey
Lazer
 

I do have identifix, when I say module I mean the active grill shutter that's what was replaced 3 times.

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Martin Technician
California
Martin
 

did you see the tsb then. the corrosion it talks about is in an inline connector from what i can see causing the code. I've personally never worked on one of these so just trying to brainstorm with you

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Lazer Mobile Technician
New Jersey
Lazer
 

Thanks Martin I did see the tsb but in this case the lin is only being pulled down once I plug the grill shutter in since there is continuity to ground.

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Saul Owner
Texas
Saul
 

I had a 2020 Dodge Ram about 2 weeks ago with the exact same code. After checking power, ground and comm, good to mention the grille shutter was brand new from the dealer and to my surprise the new grilled was the problem. The original grille shutter was replaced cause it had a very small crack. We put original grille back and voila everything was working. As soon as we crank the truck grille…

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Steven Owner/Technician
New York
Steven
 

TSB Document: - MC…​.​pdf Affected Component: STRUCTURE Summary GRILLE, Active Shutter When replacing Active Grille Shutter on vehicles built before April 10th, 2018 rearrange pin configuration in the AGS connector to MY 2019 configuration. Failure to do so will result in U11E9 Loss of Comm with AGS. Please view I-sheet in STAR parts for reference.

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Helpful
Justin Technician
California
Justin
 

What is voltage on Lin on harness side disconnected ? Also check your connector at left front behind fascia for water intrusion . Also ohm out Lin to ags ground on harness side of ags connector with pcm and ags disconnected.

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Lazer Mobile Technician
New Jersey
Lazer
 

The voltage I think was 12v I will check again tomorrow

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Charles Technician
California
Charles
 

Every time I remember dealing with that fault it was due to the harness being damage behind the bumper or water/corrosion in an inline connector to the grill shudder motor.

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Justin Technician
California
Justin
 

Exactly . Lots of bumper smacks causing it .

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Robert Mobile Technician
Michigan
Robert
 

Depending on the vehicle's build date you may have to order the replacement connector and re-pin the connector. Please see the Star Case from Stellantis.

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John Mobile Technician
New Jersey
John
 

Need to change pins in grill connector

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Gery Diagnostician
Florida
Gery
   

Pretty sure you have to change connector and repin it. The new ags is pinned differently and you can’t use original connector cause pin4 is blocked this is from alldata community repairs. worked for me…. we are abody shop with same problem we found a chrysler ags kit #…AA that is a 4 prong plug that is required to make shutter work. original setup pin#1 Black pin#2 White pin#3 Red pin#4…

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Joel Owner
Kansas
Joel
 

I had this problem and I ended up havi to switch pins around in the connector. The old style seemed to be wired differently the new one I had.

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Howard Technician
Texas
Howard
 

The new grille shutter should have e come with a new connector that relocates the pins in the connector, if it came from a body shop they often do not install the new connector and you end up with a no comm for the shutter. If you don't have the new connector, you will have to relocate pins manually,

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Raymond Mobile Technician
Michigan
Raymond
 

Hi laser, The few problems I had with GM, Ford, and Chrysler active grill shutters no communication and of course the active grill motor was the culprit but I checked power, ground, and pulled out labscope and monitor Lin bus for activity can’t remember if just key up or get to scan data, but u should see a 12 v data line digital waveform. You should be able to see it at harness connector with…

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Lazer Mobile Technician
New Jersey
Lazer
 

Thank you all so much, I'm gonna try switching the pins

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Lazer Mobile Technician
New Jersey
Lazer Resolution
 

Thank you all for your help, I switched the pins around like many suggested and it is fixed! I really appreciate all the responses, I never would of fixed it without you!

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Thanks
Mike Mobile Technician
South Carolina
Mike
 

If I remember correctly either identifix or the TSB suggested to look I'm the side markers for condensation. If that's the case you may want to check to make sure the cause of the symptom is rectified. Assuming you had to swap pins I would guess it doesn't have an updated harness in it.

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