ECU module programming guide using FDRS

[dougbillings]

I’m not sure whether this is a contributing factor or not, but you really shouldn’t be disconnecting your laptop at all during the procedure. When you shut down the truck, leave the laptop connected to your truck and logged into FDRS.

As for wait time after turning off the ignition, 30 minutes is fine but what you really want is to check for signs that all of the relays have reset. There is no set time for that. But you know the truck is as “dead” as it’s ever going to get when the LED halos around the rear seat USB ports have extinguished. The it’s safe to restart the truck to complete the post-install validation. But leave the laptop connected and running during this wait time.

I don't know if this is specific to the GWM update of if applies to all of the USB updates but while I was able to successfully get the GWM update to complete, something seems to be preventing my truck from shutting all the way down for the APIM update to complete. I've turned it off and closed all doors and walked away with the keys and left it over night. When I turned it on this morning I still get the prompt to restart vehicle to complete update.

A few things:
- The halo around the back seat USB's are turned off but the radio control buttons on the dash are lit up (I am seeing this through the window without the keys nearby).
- I do have the battery tender/charger hooked up and turned on as well as the hood up.
- I did unplug the laptop as I feared the connection was keeping the truck awake.

I am letting her sit for another hour to see if it takes before I have to take my daughter to her gym class. Thanks for the help.

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[JEB]

I don't know if this is specific to the GWM update of if applies to all of the USB updates but while I was able to successfully get the GWM update to complete, something seems to be preventing my truck from shutting all the way down for the APIM update to complete. I've turned it off and closed all doors and walked away with the keys and left it over night. When I turned it on this morning I still get the prompt to restart vehicle to complete update.

A few things:
- The halo around the back seat USB's are turned off but the radio control buttons on the dash are lit up (I am seeing this through the window without the keys nearby).
- I do have the battery tender/charger hooked up and turned on as well as the hood up.
- I did unplug the laptop as I feared the connection was keeping the truck awake.

I am letting her sit for another hour to see if it takes before I have to take my daughter to her gym class. Thanks for the help.

I’ve never seen bullet point one before. You may have to start from scratch. First thing I’d do is unplug and disconnect everything. Then lock the doors and walk away. DO everything you’d do to park the truck in a public parking lot. Can you get the truck to power down completely? Something ain’t right here. If the Sync screen/controls are hanging up, you might have to reboot it.

What’s your battery voltage when you are logged into FDRS? How are your charger alligators clipped? Red should be on positive. Black should be on the bolt that holds the cable to the battery monitoring sensor on one end and that runs to the chassis on the other. Does your charger have a power supply mode and are you using it instead of charger mode?

Something electrical about all this isn’t making sense to me.

 

[dougbillings]

I’ve never seen bullet point one before. You may have to start from scratch. First thing I’d do is unplug and disconnect everything. Then lock the doors and walk away. DO everything you’d do to park the truck in a public parking lot. Can you get the truck to power down completely? Something ain’t right here. If the Sync screen/controls are hanging up, you might have to reboot it.

What’s your battery voltage when you are logged into FDRS? How are your charger alligators clipped? Red should be on positive. Black should be on the bolt that holds the cable to the battery monitoring sensor on one end and that runs to the chassis on the other. Does your charger have a power supply mode and are you using it instead of charger mode?

Something electrical about all this isn’t making sense to me.

Battery voltage is ~13. Charger has good connection. Here are pics of what I'm seeing taken through open back window.

 

[dougbillings]

Battery voltage is ~13. Charger has good connection. Here are pics of what I'm seeing taken through open back window.

I just locked the doors as well ... see if that changes anything

 

[PadU235]

That is only for people with 21146 and a greyed out uodates options page. No one else

The last sync version that showed on my screen was 20312. No version displays now and the auto updates option is greyed out. I have a service appointment in two weeks, does this TSB ( TSB 22-2117) apply to my situation?

 

[Jesse-Infotainment]

The last sync version that showed on my screen was 20312. No version displays now and the auto updates option is greyed out. I have a service appointment in two weeks, does this TSB ( TSB 22-2117) apply to my situation?

I don’t believe so . 20312 is prior to 21146 which was 1.7.1

 

[Snakebitten]

Ahhhh. The dreaded restart loop.

I caution that my experience with the restart loop was unique, in that no one else took the same approach, and it was early on in this thread. You can see what I posted in post #71
It seems like a year ago. Lol

I am NOT recommending what I did, but rather pointing out that it appeared to me that the files on the USB stick have already been copied to the trucks onboard storage by the time you are in the restart loop. Although there could be SOME reason for the USB stick to still be in the truck when you restart, I don't think it's for fetching files but rather for some kind of comparison or verification?
Honestly, I don't know. (Jesse does)

Regardless, post #71 is what I did and the result.

 

[JEB]

Battery voltage is ~13. Charger has good connection. Here are pics of what I'm seeing taken through open back window.

That ain’t right. Unplug everything. Shut all the doors, hood. Pull the voltmeter out of the 12v socket. Lock it. Gotta get that last relay to reset. My concern is that you are getting almost everything to shut down but there is still part of the Sync that is still live so it dosn’t know you’ve turned off the ignition.

 

[Snakebitten]

Would the cigarette lighter voltage reader keep a module awake by chance?

 

[Ruffiano99]

I don’t believe so . 20312 is prior to 21146 which was 1.7.1

Damn, im at 20312 Rev 243, nothing is grayed out and im able to set auto updates and a schedule. But havent had OTA and no success with updating via USB. This TSB wont help me get unstuck?

 

[dougbillings]

APIM finally updated. Moving to TCU.

 

[PadU235]

Would the cigarette lighter voltage reader keep a module awake by chance?

I have a voltage reader plugged into that same outlet and it does turn off after a few minutes.

 

[JEB]

I have a voltage reader plugged into that same outlet and it does turn off after a few minutes.

Good to know. Thanks. It isn’t common, but some accessories can interfere with a circuit shutting down correctly or completely. Glad this is not one of them.

 

[PadU235]

Damn, im at 20312 Rev 243, nothing is grayed out and im able to set auto updates and a schedule. But havent had OTA and no success with updating via USB. This TSB wont help me get unstuck?

I'm In the same boat (20312) but the 1.7.1 update showed as failure before my update history got erased. I think I will go on in for service and see what happens. How bad can it be, It's already broken

 

[Jesse-Infotainment]

Damn, im at 20312 Rev 243, nothing is grayed out and im able to set auto updates and a schedule. But havent had OTA and no success with updating via USB. This TSB wont help me get unstuck?

No. It’s not intended for a update path. Be careful with this method also. The previous fastboot they release erased peoples navigation entirely.

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