DIY: S65 Throttle Actuator

W/// · 07-16-2015, 11:27 AM

Quote:

Originally Posted by MarkFT

I was doing a bunch of other maintenance work at the same time, but I would estimate 5-ish hours, including the time required to rebuild the actuators (probably about an hour alone). The work wasn't too hard, and if I had to do it all over again I could probably do it in half the time.

The biggest slow downs were getting some of the connectors apart (some of the electrical connections and also the hose connected to the rear of the intake plenum).

I'd schedule half a day if you're mechanically inclined and want to take your time/be meticulous. I didn't break any connectors and everything went back together without any issues, so I was happy with the time it took.

How'd the rebuild itself go? Did it fix the problem?

W/// · 07-16-2015, 11:30 AM

Quote:

Originally Posted by EJT86

Any one else have trouble with the three actuator bolts? I got all the way up to that point last night but they're ridiculously tight. I might have partially stripped a bolt

I didn't have any problems. Mine weren't on super tight.

EJT86 · 07-16-2015, 11:58 AM

Quote:

Originally Posted by W///

I didn't have any problems. Mine weren't on super tight.

Lucky me then

M3an V8 · 07-16-2015, 01:07 PM

Quote:

Originally Posted by EJT86

Quote:

Originally Posted by W///

I didn't have any problems. Mine weren't on super tight.

Lucky me then

Hey Erik, how did it go? Got her up and running again?

EJT86 · 07-16-2015, 01:32 PM

Quote:

Originally Posted by M3an V8

Hey Erik, how did it go? Got her up and running again?

Ugh well of course things came up last weekend so I couldn't get to it until yesterday...spent the night taking everything apart only to find the bolts are super tight getting the actuator off...I used a T25 bit but I'm going to buy a T30 and try it because I think it was starting to strip

M3an V8 · 07-16-2015, 01:49 PM

Yeah the bolts are a bit snug, i sprayed a little bit of PB blaster and they came out a lot easier.

tkearns119 · 07-16-2015, 05:00 PM

Damn this is frustrating. Codes prior to replacement of bank 2 were.

Engine / Motor
Fault: Throttle valve actuator CAN message
Code: CDBF
Fault: check at lower top
Code: 2B57
Fault: CAN bus off throttle
Code: CD93
Fault: Control module self-test ROM
Code: 277B
Fault: Throttle valve actuator control monitor
Code: 2B16
Fault: Throttle Monitor Bank 2
Code: 2B26

Now periodically getting after multiple clears.

Fault: Throttle valve actuator CAN message
Code: CDBF
Fault: check at lower top
Code: 2B57
Fault: CAN bus off throttle
Code: CD93

EJT86 · 07-16-2015, 05:23 PM

Quote:

Originally Posted by M3an V8

Yeah the bolts are a bit snug, i sprayed a little bit of PB blaster and they came out a lot easier.

T27 is the size and I switched to the 3/8 drive got it done now once I figure out how to get the rod disconnected from the actuator ill be done

EJT86 · 07-16-2015, 06:03 PM

Never mind got it...getting the old one out is the biggest PITA but "new" one is in now reassembling

M3an V8 · 07-16-2015, 06:40 PM

Make sure to double check your sensor connectors, had to take plenum off twice coz my coolant temp sensor wasn't plugged in all the way.

EJT86 · 07-16-2015, 08:59 PM

I got it all back together and took it for a test drive. Had the same "increased emissions" warning on startup test drive was regular. Checked to see if that nasty downshift rev noise was there and of course it was...downshift, rev match, harsh noise and straight to limp mode. I guess I'll scan it tomorrow and see what codes come up

M3an V8 · 07-16-2015, 10:39 PM

Were the faults cleared prior to start up?

EJT86 · 07-17-2015, 08:06 AM

Quote:

Originally Posted by M3an V8

Were the faults cleared prior to start up?

I didn't check the codes prior. I had someone hit the throttle after it going into limp mode and saw one actuator wasn't working so figured it needs replacing anyway so may as well start there

EJT86 · 07-18-2015, 11:00 PM

Took some screen shots of the fault codes I got after another limp mode episode. The drivers side actuator was replaced

M3an V8 · 07-19-2015, 12:28 AM

Quote:

Originally Posted by EJT86

Took some screen shots of the fault codes I got after another limp mode episode. The drivers side actuator was replaced

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[IMG]http://i1275.photobucket.com/albums/...psq3pg1ovc.jpg" rel="nofollow" target="_blank">http://<a href="http://i1275.photobu...pg1ovc.jpg</a>[/IMG]
[IMG]http://i1275.photobucket.com/albums/...psgz8k84su.jpg" rel="nofollow" target="_blank">http://<a href="http://i1275.photobu...8k84su.jpg</a>[/IMG]
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[IMG]http://i1275.photobucket.com/albums/...psyfiogh0y.jpg" rel="nofollow" target="_blank">http://<a href="http://i1275.photobu...iogh0y.jpg</a>[/IMG]

#2 and #3 on the first screen shot, I got those when I replaced my actuators due to the connectors for the corresponding sensor not plugged in all the way.

EJT86 · 07-19-2015, 09:36 AM

Quote:

Originally Posted by M3an V8

#2 and #3 on the first screen shot, I got those when I replaced my actuators due to the connectors for the corresponding sensor not plugged in all the way.

Do you think I should bother? It's still having the same problems. Maybe avoid opening it all up again to tighten connections only to find out something else needs replacing

M3an V8 · 07-19-2015, 01:12 PM

Quote:

Originally Posted by EJT86

Quote:

Originally Posted by M3an V8

#2 and #3 on the first screen shot, I got those when I replaced my actuators due to the connectors for the corresponding sensor not plugged in all the way.

Do you think I should bother? It's still having the same problems. Maybe avoid opening it all up again to tighten connections only to find out something else needs replacing

Totally up to you. The thermostat sensor (#16 first pic) right below the "V8" of the plenum, on the thermostat housing, you might be able to see it if its pushed in all the way. I believe the throttle sensors are at the end of each throttle body bank (#5 second pic).

Sorry can't comment on your "torque" fault codes.

EJT86 · 07-19-2015, 01:58 PM

Quote:

Originally Posted by M3an V8

Totally up to you. The thermostat sensor (#16 first pic) right below the "V8" of the plenum, on the thermostat housing, you might be able to see it if its pushed in all the way. I believe the throttle sensors are at the end of each throttle body bank (#5 second pic).

Sorry can't comment on your "torque" fault codes.

That's alright. Ugh I might have to bite the expensive bullet

M3an V8 · 07-23-2015, 04:58 PM

I guess replacement gears are now available.

http://m.odometergears.com/mobile/pr...+E90+07-11/159

EJT86 · 07-23-2015, 05:21 PM

Quote:

Originally Posted by M3an V8

I guess replacement gears are now available.

http://m.odometergears.com/mobile/pr...+E90+07-11/159

That's been up for a while. I emailed a week ago to make sure and was told they weren't yet available

kb9uwu · 07-31-2015, 03:04 PM

W///, thanks again, just swapped bank 2 in 2.5 hours, start to finish. Never done any work under the hood of this car except oil changes. Would not have tackled replacement without this DIY. Like others have said, my knuckles and back hurt, but my wallet is happy! Now to start a bet around the shop when bank 1 takes a dive...

Ipson · 08-08-2015, 08:33 PM

So, is the consensus replacing the gears in the throttle actuators actually solves the problem of 'limp mode'? It's the gears and not the electronics? Does anyone have any experience yet with the rebuild of the actuators? Our M3 is starting to show signs of this problem and $800 just for parts is a little hard to take. Any and all comments welcomed.

07-16-2015, 01:49 PM	#380
M3an V8 Private 26 Rep 84 Posts Drives: E90 M3 Alpine Weiss Join Date: Oct 2013 Location: OC iTrader: (0)	Yeah the bolts are a bit snug, i sprayed a little bit of PB blaster and they came out a lot easier.
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07-16-2015, 05:00 PM	#381
tkearns119 Enlisted Member 3 Rep 38 Posts Drives: 2009 E93 M3 Join Date: Oct 2014 Location: Fort Thomas, KY iTrader: (0)	Damn this is frustrating. Codes prior to replacement of bank 2 were. Engine / Motor Fault: Throttle valve actuator CAN message Code: CDBF Fault: check at lower top Code: 2B57 Fault: CAN bus off throttle Code: CD93 Fault: Control module self-test ROM Code: 277B Fault: Throttle valve actuator control monitor Code: 2B16 Fault: Throttle Monitor Bank 2 Code: 2B26 Now periodically getting after multiple clears. Fault: Throttle valve actuator CAN message Code: CDBF Fault: check at lower top Code: 2B57 Fault: CAN bus off throttle Code: CD93
	Appreciate 0 Quote

07-16-2015, 06:03 PM	#383
EJT86 Brigadier General 2383 Rep 3,726 Posts Drives: 2018 M2 Join Date: Mar 2014 Location: Boston, MA iTrader: (0) Garage List [0.00] 2018 BMW M2 [0.00]	Never mind got it...getting the old one out is the biggest PITA but "new" one is in now reassembling
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07-16-2015, 06:40 PM	#384
M3an V8 Private 26 Rep 84 Posts Drives: E90 M3 Alpine Weiss Join Date: Oct 2013 Location: OC iTrader: (0)	Make sure to double check your sensor connectors, had to take plenum off twice coz my coolant temp sensor wasn't plugged in all the way.
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07-16-2015, 08:59 PM	#385
EJT86 Brigadier General 2383 Rep 3,726 Posts Drives: 2018 M2 Join Date: Mar 2014 Location: Boston, MA iTrader: (0) Garage List [0.00] 2018 BMW M2 [0.00]	I got it all back together and took it for a test drive. Had the same "increased emissions" warning on startup test drive was regular. Checked to see if that nasty downshift rev noise was there and of course it was...downshift, rev match, harsh noise and straight to limp mode. I guess I'll scan it tomorrow and see what codes come up
	Appreciate 0 Quote

07-16-2015, 10:39 PM	#386
M3an V8 Private 26 Rep 84 Posts Drives: E90 M3 Alpine Weiss Join Date: Oct 2013 Location: OC iTrader: (0)	Were the faults cleared prior to start up?
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07-18-2015, 11:00 PM	#388
EJT86 Brigadier General 2383 Rep 3,726 Posts Drives: 2018 M2 Join Date: Mar 2014 Location: Boston, MA iTrader: (0) Garage List [0.00] 2018 BMW M2 [0.00]	Took some screen shots of the fault codes I got after another limp mode episode. The drivers side actuator was replaced
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07-23-2015, 04:58 PM	#393
M3an V8 Private 26 Rep 84 Posts Drives: E90 M3 Alpine Weiss Join Date: Oct 2013 Location: OC iTrader: (0)	I guess replacement gears are now available. http://m.odometergears.com/mobile/pr...+E90+07-11/159
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07-31-2015, 03:04 PM	#395
kb9uwu Supreme Czar 309 Rep 779 Posts Drives: AW E90 M3 6MT (GONE) Join Date: Oct 2014 Location: Central Illinois iTrader: (0)	W///, thanks again, just swapped bank 2 in 2.5 hours, start to finish. Never done any work under the hood of this car except oil changes. Would not have tackled replacement without this DIY. Like others have said, my knuckles and back hurt, but my wallet is happy! Now to start a bet around the shop when bank 1 takes a dive...
	Appreciate 0 Quote

08-08-2015, 08:33 PM	#396
Ipson Registered 0 Rep 2 Posts Drives: 2011 BMW E93 Black Join Date: Jul 2015 Location: Colorado Springs, CO iTrader: (0)	So, is the consensus replacing the gears in the throttle actuators actually solves the problem of 'limp mode'? It's the gears and not the electronics? Does anyone have any experience yet with the rebuild of the actuators? Our M3 is starting to show signs of this problem and $800 just for parts is a little hard to take. Any and all comments welcomed.
	Appreciate 0 Quote