Active grill shutters code U11E9

[48prerunner]

So truck threw this code, So far I have moved the louvers by hand, if i move them to closed when I start the truck they open. I have not seen the truck go thru the test cycle of the louvers. I guess next step would be to check the power feeds at the connector. Am i wrong in assuming it's a bad actuator? only opening and not closing? I didn't have a scan tool at work so unhooked the battery to clear code. Did not come home on 40 mile drive home, but popped back up next morning on start up. When code is on truck wont go in ECO mode. I tried unhooking battery again over night. Next morn no code and eco mode would show on dash on way to work. when restarted again got light and no eco mode.

 

[Tach_tech]

U11E9 is a lost communication code. Meaning the PCM is receiving invalid bus messages from the active grill shutter.

Most likely cause is the grill shutter itself. Are any of the shutters damaged or disconnected from the linkage. If that’s all fine you’ll have to start checking wiring,power,ground, and the pin bus circuit.

 

[48prerunner]

U11E9 is a lost communication code. Meaning the PCM is receiving invalid bus messages from the active grill shutter.

Most likely cause is the grill shutter itself. Are any of the shutters damaged or disconnected from the linkage. If that’s all fine you’ll have to start checking wiring,power,ground, and the pin bus circuit.

Not damaged and they move by themselves if I manually close them then start the truck they open.

 

[Dodge 1500 4X4]

You shouldn't be able to close or open them they are run by a servo motor, there is something wrong with the motor itself, dealer should be able to run a test on them.

 

[Pull Ya]

They really aren't necessary. Take them out-leave the motor plugged in and zip tie it to one of the braces.
Jay

 

[48prerunner]

Ok so if you get this code it is not the shutters it is not the motor it is the wire and the pigtail. YES it took me this long to fix it inspection is this month. I have a brand new motor I bought in feb but was too cold to get the grill off in one piece.

The wire for the BUS had corroded off but you could not see it. I lucked out when I checked the positive lead with the power probe I got power and then I lost it so that wire was bad. When I pulled back the plastic loom found other wire was bad. Here is the part you need mopar discontinued it. Guy ships fast and is well protected in a huge bubble wrap.

MOPAR Chrysler Replacement Connector Kit # 68225125AA
https://www.ebay.com/p/1748046636

 

[PoMansRam]

Ok so if you get this code it is not the shutters it is not the motor it is the wire and the pigtail. YES it took me this long to fix it inspection is this month. I have a brand new motor I bought in feb but was too cold to get the grill off in one piece.

The wire for the BUS had corroded off but you could not see it. I lucked out when I checked the positive lead with the power probe I got power and then I lost it so that wire was bad. When I pulled back the plastic loom found other wire was bad. Here is the part you need mopar discontinued it. Guy ships fast and is well protected in a huge bubble wrap.

MOPAR Chrysler Replacement Connector Kit # 68225125AA
https://www.ebay.com/p/1748046636

Good catch on that. They must have changed the design of the pigtail and connector plug if this one is discontinued? I guess the only other alternative would be to cut the connector off and splice in your own more reliable one.

In regards to the above, I'm wondering if the shutter actuator is fail open (has spring tension to open), so if it looses power or comms, they just stay open.

 

[48prerunner]

I'm not sure I now know the default position is open because if you shut the truck off with them working and they are closed they open. The positive is hot all the time. I think I was lucky when I would close them by hand that the broken positive wire bounced enough on the road to open. I'm not sure they never stayed closed as far as I could tell. I'd watch the temp gauge. In order to see them cycle at start up you have to be fast if you are by yourself or you miss it. They perform a check every time you start the truck.

 

[CHUCK31979]

I know this post was almost a year ago. Which ones did you remove? To keep it from throwing codes you need to leave the top and bottom ones on both sides in.

 

[GTyankee]

MotorCityMechanic on Youtube has a couple of videos on just the AGS unit

He makes videos that are quite detailed on several Ram issues

 

[John Arrambidez]

Ok so hopefully someone can assist or at least confirm my suspicions. Like the rest of this thread I have the CEL and the fault being the loss comes with the AGS. Here are the troubleshooting steps I've taken.
1. PCM rest with removal of negative battery terminal. The CEL is gone upon start up, then back on after start up #2.
2. Ive watched the shutters open/close so I know the motor is working.
3. Checked for any obstructions. There are none.
4. use a multi meter for several different trouble shooting steps. I found that when the CEL is on I get a -.05-08v reading. After a PCM (battery reset) and the CEL is off I get a .5-8 volt reading. Ive tested the grounding line and no issues there.
5. Traced the line as best as possible and did not find any indication that cabling is damaged.
6. Reset all connections, blew them out with air to ensure they are clean.

My conclusion is that the PCM is the issue. Either needs to be replaced or flashed. This is because when the CEL light is off there is power to the AGS (things are working with positive volt reading), when the CEL is on the AGS no longer receives power (negative volt reading).

Is this sound logic? I too am outside the 36K warranty so I dont want to drop 1K or more for the dealer to fix it. If thats the case I might as well by a aftermarket PCM/Tuner and get it configured the way I want, better gas, power ect..

Any feedback or trouble shooting Ive overlooked is appreciated.

Also, one last thing its a pain in the ass to get to on the 5th Gen, all the front in body trim more or less comes off and not very easily.

 

[Tach_tech]

Where are you checking the voltage reading? At the AGS connector? There’s 3 circuits to the AGS, power,ground and a LIN bus circuit.

 

[John Arrambidez]

Where are you checking the voltage reading? At the AGS connector? There’s 3 circuits to the AGS, power,ground and a LIN bus circuit.

we checked the ags connection into the louver motor. Couldn’t really map the cabling back to the PCM. We also checked the fuse and that worked too.
Checked all 3 circuits.
Red -.5 with CEL. .5 with no CEL
White -.2 with CEL. .2 with no CEL
Black no voltage

to me this says cables are good to the connection point

 

[Tach_tech]

The fact that you have virtually no voltage on the lin bus or power circuit, I would be more leaning towards a wiring issue. The PCM supplies the LIN bus voltage and the 12v power comes from the power distribution centre. So you’d have to have a failed PCM and PDC. Does the black(ground) wire have continuity to ground?

 

[John Arrambidez]

Not sure what is meant by continuity to ground.

it’s odd, when the code/CEL is off (no CEL light) there is power. When it’s on, there is no power.

 

[Tach_tech]

Continuity to ground is checking for a good ground signal. So with your multimeter set to ohms/continuity setting, one lead to the battery or chassis ground, other lead to the black wire at the AGS connector. That will give you a reading in ohms.

 

[John Arrambidez]

Continuity to ground is checking for a good ground signal. So with your multimeter set to ohms/continuity setting, one lead to the battery or chassis ground, other lead to the black wire at the AGS connector. That will give you a reading in ohms.

Ah ok, sorry yes we did use the battery ground.

 

[Tach_tech]

Ah ok, sorry yes we did use the battery ground.

What reading did you get for the ground circuit when you checked continuity?

 

[John Arrambidez]

What reading did you get for the ground circuit when you checked continuity?

We got no voltage reading when checking the ground circuit. we used a few different points and scenarios such as truck running, off but in start position, in the acc position, before and after clearing the CEL.

 

[Tach_tech]

We got no voltage reading when checking the ground circuit. we used a few different points and scenarios such as truck running, off but in start position, in the acc position, before and after clearing the CEL.

Not voltage reading, there should never be voltage on a ground circuit. Did you check resistance? You should get a reading in ohms.