2011 ML550 passenger power seat - won’t move fwd/back OK up/down and tilt
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
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From: NorCal
2011 ML550 2013 GLK350
2011 ML550 passenger power seat - won’t move fwd/back OK up/down and tilt
New to me 2011 ml550 passenger seat won’t move forward or backward, but OK otherwise. Tomorrow I’ll check connections but beyond that I’m looking for guidance on troubleshooting this. The switch feels normal but has no effect at all, no motor noise, no really click, etc. As if no power. Any suggestions?
Thanks,
Mark
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Joined: Oct 2011
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
It's not a fuse issue so don't waste time checking them. There is only one fuse that powers up the Seat Cont. Module, which we know is already powered up.
You have no alternative but to have the codes read with a scanner. It could be the switch, the module or the motor.
You have no alternative but to have the codes read with a scanner. It could be the switch, the module or the motor.
Last edited by Maj. Dundee; Jan 2, 2019 at 07:29 AM.
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
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From: NorCal
2011 ML550 2013 GLK350
Thanks for the quick response! I just bought
last month to diagnose an AC issue with my previous ML ('03, since passed on to my stepson), time to put it to use on the '11. I'll also check under the seat just in case some shoved something under there that yanked a connector. Fortunately the seat is positioned such that there's plenty of legroom in both rows so not an urgent issue. (At some point I'll revisit the '03's AC issue: sometimes it doesn't blow cold air - compressor @ 100% but pressure ~4 bar - most times it does - compressor @ 100% pressure ~12 bar)
last month to diagnose an AC issue with my previous ML ('03, since passed on to my stepson), time to put it to use on the '11. I'll also check under the seat just in case some shoved something under there that yanked a connector. Fortunately the seat is positioned such that there's plenty of legroom in both rows so not an urgent issue. (At some point I'll revisit the '03's AC issue: sometimes it doesn't blow cold air - compressor @ 100% but pressure ~4 bar - most times it does - compressor @ 100% pressure ~12 bar)
Last edited by markloch; Jan 3, 2019 at 11:55 AM. Reason: fix hyperlink
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
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From: NorCal
2011 ML550 2013 GLK350
Hey Major,
I bought the Autel scanner that Amazon calls the 'newer version' in the page you sent me - as I understand it, same unit but requires make-specific modules, first one free with purchase. (I edited the post to remove the walmart link that was automagically added).
The scanner couldn't talk to the passenger seat controller, asked to make sure ignition is on, tester connected, battery charged ... as a sanity check I scanned the driver's seat controller and was able to connect fine.
On a side note, a full scan resulted in just one fault, 5116 - L6/2 (right front speed sensor) : Check installation position of sensor. I'll pop the wheel off and check the cable.
That said there were a number of modules that reported No Checked Fault and drilling down into the module shows one or more Not Checked. I couldn't find reference to in documentation or online, sent Autel support an email, and if I can get to their forum will ask there as well.
I bought the Autel scanner that Amazon calls the 'newer version' in the page you sent me - as I understand it, same unit but requires make-specific modules, first one free with purchase. (I edited the post to remove the walmart link that was automagically added).
The scanner couldn't talk to the passenger seat controller, asked to make sure ignition is on, tester connected, battery charged ... as a sanity check I scanned the driver's seat controller and was able to connect fine.
On a side note, a full scan resulted in just one fault, 5116 - L6/2 (right front speed sensor) : Check installation position of sensor. I'll pop the wheel off and check the cable.
That said there were a number of modules that reported No Checked Fault and drilling down into the module shows one or more Not Checked. I couldn't find reference to in documentation or online, sent Autel support an email, and if I can get to their forum will ask there as well.
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
Likes: 3
From: NorCal
2011 ML550 2013 GLK350
As far as the scanner goes, it's the "DIY version of MD802" Autel scanner you linked to: rather than having software for ALL makes, they sell it with NO makes loaded, and with the purchase you get to download one make's software. I own only MB so for the foreseeable future only need the MB module. Saved $110. In the event I get another make, additional modules are $10/pop.
Cheers,
Mark
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
After the passenger seat controller scan failed, I tried scanning the driver's seat controller and it scanned just fine. Assuming the right and left seat controllers are effectively equivalent, this suggests something is amiss with whatever gets scanned on the passenger side ... would that be the switch (A1648704410)?
Then post the code number/s for the pass. seat which will be, for example 9000. Also post your full vin #.
And yes that is the part # for the right side seat adj. switch.
Last edited by Maj. Dundee; Jan 3, 2019 at 11:23 PM.
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Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
Likes: 3
From: NorCal
2011 ML550 2013 GLK350
VIN is 4JGBB7CB5BA625429
To clarify: Selecting the "scan" icon, and after it fetches the VIN and identifies the model, it presents "auto scan", "control unit" and "vehicle information". When I select "control unit" I can then scroll through various modules/controllers. When I select the driver seat module, the scanner connects successfully and reports back accordingly, as it does with all the other available modules, except the passenger seat module. When I select the passenger seat module, the scanner 'spins' for a while then apparently times out for lack of a response from the controller and displays:
Tester not communicating with control unit.
1. Make sure the ignition is switched ON.
2. Check the cables between the Tester and the vehicle DLC.
3. Check that the vehicle battery is charged
4. Verify if the system is configured for the Vehicle.
Point being that 1-4 are all good (moot point as the scanner communicates with the driver seat controller and every other module I scanned).
I'll try a full/auto scan (as opposed to a per-module scan) to see what it reports on the passenger seat.
Regarding the switch (A1648704410), is that also (i.e. does it contain) the controller that the scanner is trying to query? If so, and assuming a full/auto scan also fails to connect to the controller, does it make sense to swap that out, or is there some way to test the switch in situ?
Cheers,
Mark
To clarify: Selecting the "scan" icon, and after it fetches the VIN and identifies the model, it presents "auto scan", "control unit" and "vehicle information". When I select "control unit" I can then scroll through various modules/controllers. When I select the driver seat module, the scanner connects successfully and reports back accordingly, as it does with all the other available modules, except the passenger seat module. When I select the passenger seat module, the scanner 'spins' for a while then apparently times out for lack of a response from the controller and displays:
Tester not communicating with control unit.
1. Make sure the ignition is switched ON.
2. Check the cables between the Tester and the vehicle DLC.
3. Check that the vehicle battery is charged
4. Verify if the system is configured for the Vehicle.
Point being that 1-4 are all good (moot point as the scanner communicates with the driver seat controller and every other module I scanned).
I'll try a full/auto scan (as opposed to a per-module scan) to see what it reports on the passenger seat.
Regarding the switch (A1648704410), is that also (i.e. does it contain) the controller that the scanner is trying to query? If so, and assuming a full/auto scan also fails to connect to the controller, does it make sense to swap that out, or is there some way to test the switch in situ?
Cheers,
Mark
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
[QUOTE=markloch;7648577]
Regarding the switch (A1648704410), is that also (i.e. does it contain) the controller that the scanner is trying to query? If so, and assuming a full/auto scan also fails to connect to the controller, does it make sense to swap that out, or is there some way to test the switch in situ?
/QUOTE]
If it won't communicate with the module, then there is no way of testing the switch.
Remove the seat bolts and gently fold it back and have a look at the module connection.
Regarding the switch (A1648704410), is that also (i.e. does it contain) the controller that the scanner is trying to query? If so, and assuming a full/auto scan also fails to connect to the controller, does it make sense to swap that out, or is there some way to test the switch in situ?
/QUOTE]
If it won't communicate with the module, then there is no way of testing the switch.
Remove the seat bolts and gently fold it back and have a look at the module connection.
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 62
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From: NorCal
2011 ML550 2013 GLK350
This is where I sometimes wish I could stand behind myself and give myself a swift kick. Per my original post I had intended to looking under the seat at the various connections. Never did. Until now. One was unplugged, and once plugged in, all good. That said, the scanner still can't communicate with the passenger seat module ... oh well, all's well that ends well.
