"Service Shifter" Msg (CAN C Bus errors) - Fixes and parts changed

[gato]

Posting update. 2nd dealer resolved my issue (so far). Fix below

That was exactly my issue and same resolution. It has been trouble free for 2 years now, including multiple off road trips over mud and water.

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[oron]

There are a few threads on the "Service Sifter" msg and some related CAN C (high speed) Bus errors, but none of them has a fix or list of parts changed to fix or dealer service record.

If you have had the "Service Shifter" issue or other error messages (ABS system error, Stability control not available error, etc) and have a fix, please post what the fix is, preferably with a list of parts changed and/or picture of service record. All these modules are connected via the high speed CAN C bus, and there will typically be multiple codes.

If you have pictures of suspected/actual affected areas, please post - e.g. some people indicated a faulty/rubbing wiring harness near right front tire, others a pinched harness under shifter housing.

Many have indicated no resolution from dealer to date - it would be good to know what was tired.

i am having the same issue like you did , it happen to me from time to time and all the CAN C bus alerts are popping out.
i tried to check the Voltage - looks good.
the wired seems to be fine.
any ideas ?

 

[gato]

i am having the same issue like you did , it happen to me from time to time and all the CAN C bus alerts are popping out.
i tried to check the Voltage - looks good.
the wired seems to be fine.
any ideas ?

Check your wire bundle/harnesses under the vehicle, specially the wire harness running next to the transmission bell housing (mine was chaffing and causing the problem), the harness near the sway bar disconnect (on Rubicon models), the CAN bus connector and harnesses under the passenger seat (can be damage simply by storing something under it), etc.

Good luck - it is truly detective work. Something is causing noise in the CAN BUS C.

 

[oron]

Check your wire bundle/harnesses under the vehicle, specially the wire harness running next to the transmission bell housing (mine was chaffing and causing the problem), the harness near the sway bar disconnect (on Rubicon models), the CAN bus connector and harnesses under the passenger seat (can be damage simply by storing something under it), etc.

Good luck - it is truly detective work. Something is causing noise in the CAN BUS C.

Hi ,
Tnx for reply ,
I am suspicois this electronic card behind the Radio i found it like that.
Do you think this is the cause?

 

[gato]

Hi ,
Tnx for reply ,
I am suspicois this electronic card behind the Radio i found it like that.
Do you think this is the cause?

Hi, I am really not an expert on CAN Bus, so don't want you to rely too much on my comments....But, I really don't think that board or the entertainment system is connected to the High Speed CAN Bus C. Can Bus C is reserved for important controls like stability control, transmission control, power steering control, etc.

Even if that board is connected to a can bus, which I doubt, it would not be the CAN Bus C.

Having said that, the root of all these CAN bus problems is signal/electrical noise that corrupts the messaging traffic. Any circuit that generates noise, interference or affect the ground can cause issues. I just don't think that is culprit.

It is a detective work, though. You need to check all the harnesses to the components mentioned.

Good luck on the hunt.

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