interesting failures, just after the last sw update

[khbkhb]

My wife noted yet another sw update "success" (apparently a repeat of 4.2.1?). Unfortunately, just after noting that in quick succession:

1. Shift system malfunction (not trying to get into Park, just powering up the car). Leaving it powered down for 5min, and then well over an hour didn't clear it.
2. Could not get two different OBDII scanners (which have previously worked with the MachE) to connect (one is an old hardwired unit, so while I didn't expect to get much, I did expect to at least get it to connect;; the other is a modern Bluetooth... still works in other cars, like a 2012 Mazda).
3. Taking it around the block (to see if it was driveable) was fine, but also produced a "backup braking assist unavailable" .. another message I've never seen before.

Anyone else seeing any weirdness since this last retransmission of 4.2.1?

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[DevSecOps]

1 - Might clear on its own??? This is the only one that I would be mildly concerned about.
2 - Strange, but could be other factors maybe?
3 - This is a common fault after updates. It clears on it's own.

 

[khbkhb]

Well, it didn't clear with an hour+ of downtime, nor after driving around the block. We'll see if it does better in the morning ... but that I can't connect to the ECM (to read the faults, or the clear them) is bonus disturbing. Admittedly, I. hadn't connected in a few months (no need to) so that's the one symptom that I can't be certain is fresh with the repeated update ... so I was wondering if anyone else was experiencing this (or at least had 4.2.1 reinstalled for reasons best known to the Factory).

 

[JohnFoxeSheets]

Well, it didn't clear with an hour+ of downtime, nor after driving around the block. We'll see if it does better in the morning ... but that I can't connect to the ECM (to read the faults, or the clear them) is bonus disturbing. Admittedly, I. hadn't connected in a few months (no need to) so that's the one symptom that I can't be certain is fresh with the repeated update ... so I was wondering if anyone else was experiencing this (or at least had 4.2.1 reinstalled for reasons best known to the Factory).

I've heard that sometimes OTA updates get some of the modules into somewhat odd states and that disconnecting the ground from the 12V battery, waiting 5-10 minutes, and then reconnecting it can help to get everything talking properly to each other. If that doesn't help, the next step would be to try charging the 12V battery - either by using a battery charger, or by driving the car for at least 30 minutes (longer would be better).

 

[khbkhb]

While I haven't disconnected the LVB (the factory made it a PITA to get to), that is a good idea.

 

[khbkhb]

That did clear the gear issue. The only remaining new warning is the reverse brake assist, but that isn't dire the way the gear shift is reported.

 

[SpaceEVDriver]

I live on a dirt road. When my sensors get dirty, I get the reverse brake assist warning...

 

[khbkhb]

Good to know. I also found this also implicating the gratuitous reinstall of 4.2.1
https://static.nhtsa.gov/odi/tsbs/2021/MC-10203890-0001.pdf

No doubt someone thought it was a good idea to reapply the already installed update, but I'd have taken a pass since it was working fine.

 

[Jeffvisor]

I just got 4.2.1 today and lost the radio sound. I am hoping after it sits for a bit and I redrive it that it comes back.

 

[khbkhb]

If not, try disconnecting the 12v battery for 10min.

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