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It seems like the rear defroster on the 2014 E350 was not not working yesterday. Had friend scan the codes did not find anything related to rear defroster but instead got U016887 Code in B84/3 - Backup camera (RFK). Here is a snippet.
Since I have not noticed any issues, does the camera software needs to be just updated updated or this is beginning of something serious?
I have similar headaches with my '14 RFK sick from production.
Prior RFK incarnations had an external CAN Module that was in charge of managing the power supply for operations.
This version is all wrapped into a complete unit. Powered from RearSAM fuse as soon as car is awakened.
The version numbers shown in OP match the latest firmware updated by my indy... but it is invariably loaded with DTCs, usually a set of 3.
RFK module complains about not chatting with the ignition switch module and the Comand screen through CAN-E2. In the process it often jams CGW that happens to be the major network bridge for all CAN's.... so I cut off the power wire to my RFK (as I am troubleshooting my crazy Alternator 50Amps swings) sicko RFK
RFK connections Fiber + PWR/GND/CAN-E2 at Trunk lid.
Now my guess is the fix may be a new updated Part # or a patch for the CGW module ...
any better idea or TSB???
Last edited by CaliBenzDriver; 04-18-2021 at 05:14 PM.
Man, I am puzzled. Is the RFK working while these error are current? Perhaps your is related to alternator issues you are having. Mine is seems to be working and was hoping to find some fault codes for defroster and instead found related to RFK.
Man, I am puzzled. Is the RFK working while these error are current?
Perhaps your is related to alternator issues you are having.
Mine is seems to be working and was hoping to find some fault codes for defroster and instead found related to RFK.
Yep puzzling, the RFK appears to work flawlessly while loaded with recurring DTC's. It could be something else is causing RFK to act up.
(It may be due to RFK being powered as soon as door opened ahead of other target modules... much like "steering module" is missing until ignition:ON).
SLOW REAR DEFROST: check how many volts are present when you turn it ON. You maybe feeding it low voltage 11.8V that makes it heat up slowly...
Personally I think that every time you scan these cars... there's always some code that got triggered due to a glitch. Especially those CAN ones. With Xentry you can see the frequency of the code and important to note whether its stored OR stored and current.
If the backup camera works when putting the car into reverse... then I wouldn't spend much time worrying about it. Unless there's some TSB on it.
Personally I think that every time you scan these cars... there's always some code that got triggered due to a glitch, especially those CAN ones.
With Xentry you can see the frequency of the code and important to note whether its stored OR stored and current.
If the backup camera works when putting the car into reverse... then I wouldn't spend much time worrying about it. Unless there's some TSB on it.
I like your approach to don't sweat the small stuff: RFK module does behave like it's working ok.
I am just keeping an eye on these 3x faults as I am entertaining RFK/CGW screwing with Rear-SAM management of alternator voltage AFTER the charge cycle
When busy CGW goes nuts... other things go South with it ..: beep-beep IC display warning "Blablabla INOPERATIVE /UNAVAILABLE" bi-monthly
These cars are really sophisticated vehicles, minus a few cutting edge bugs from 3rd party suppliers integration.
04-18-2021, 11:08 AM
mostly all right
