Technical 500e Reset/Reboot Procedure

[ben]

This is coming up a few times now and always linked to another site for the answer, so I felt it's best I post it here too.

Method One​

Can fix false alarm warnings, and failure to shut down or start &/or charge, but it may only be available when the car detects a problem.

1. Disable "Keyless Entry" in the touchscreen (behind the steering wheel) under "Doors & Locks".
2. Get settings mode ("gear" icon) on the speedometer screen, with the left/right arrows on the wheel.
3. Press the brake AND start button for 30 seconds. A new menu appears: "shut off".
4. Follow onscreen instructions. It asks twice to keep the OK button & brake pedal pressed until the displayed countdown bar finishes.
5. After shut-down, wait 5+ minutes. Then it should work normally & you can reset Keyless Entry.
6. If it still doesn't work, try starting the car to "ready" mode, wait 5+ seconds, then turn it off, get out & lock it, wait 5+ minutes, then restart 5 sec, off 5 min, etc. 10 cycles will sometimes clear false alarms.
7. If it still doesn't work, go back to step 2 but leave it shut down as long as possible (30+ hours nearly always works in a 2019, but once when that failed 61 hrs. worked).

It turns off everything including the 12 V & HV batteries. Don't interrupt the shutdown with the left arrow or it will activate every error message.

Method Two​

If that doesn't work, & you're stranded with a non-working car, you might try the @IanML 12V reboot.

1. Leave the bonnet open, along with a door or the left window (for headlight switch access), & wait 5 min for sleep mode.
2. Disconnect the 12V & wait 5 min for the system to depower.
3. Reconnect the 12V, wait 30 seconds & without opening or closing any door, hatch, or hood, turn on the headlights. Now you’re good to go.

 

[varesecrazy]

Thanks Ben

 

[Concrete]

An AA man had to do Method 2 to mine a few months ago, so I could have done with knowing this before - did the job, anyway

 

[gazz_bee]

Method One worked for me to remove a low key fob battery warning that wouldn't self clear. Saved me a trip to the dealers.

 

[Electric Tire Shredder]

There's an updated version of the instructions posted above, at my "SiteMap" link (click here).

We keep learning more & more nearly every month.

For example, a new reboot was recently added, so please check the SiteMap link.

This isn't just a "reset" of factory settings. It's rebooting to clear glitches, as needed for many other computers, such as a toaster or coffeemaker.

 

[Electric Tire Shredder]

...or a gas car:

The 2013-19 gas 500 has more computers than the electric one! The EV has a computer for the battery, but none for ignition or transmission, or any of the fuel or air or exhaust systems.