Fault in can communications with N73 EZS control module?

Tiny
ALAEDDIN IBRAHIM BEN GHARBIA
  • MEMBER
  • 2005 MERCEDES BENZ C200
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 138,000 MILES
My car has gear shift level disappeared from IC, the ac condition unavailable on can bus means not running, parktronic does not working no volts for bumpers but it is working with no fault and flashing when ignition on only reverse lights does not go on when r gear in but from SAM test it is light on audio 20 fault can communication with N73 both SAMs f and rear fault is also can N73 fault can communication.
Thursday, July 6th, 2023 AT 6:22 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Can I ask if a CAN scan was done? You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

We should start by checking the fuses, here is a guide that should help.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

The Audio 20 fault suggests a problem with the audio system. If both the front and rear SAM modules are experiencing faults, it could indicate a problem with the modules themselves or a wiring issue. Similarly, if the N73 module (which is responsible for communication) is also experiencing faults, it could be related to a wiring issue or a malfunctioning module.

It is common for the SAM modules to go out if all fuses are good, I would try swapping the SAM module out. Here is how in the images below.

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Friday, July 7th, 2023 AT 11:42 AM
Tiny
ALAEDDIN IBRAHIM BEN GHARBIA
  • MEMBER
  • 2 POSTS
Thanks a lot fixed change ECU and ezs and els and now everything back to work.
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Monday, July 10th, 2023 AT 4:27 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Thanks for letting us know, we are here to help, please use 2CarPros anytime.
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Monday, July 10th, 2023 AT 10:32 AM

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