WARNING: I don't recommend trying the 00 00 to FF FF undocumented message test I described in my last post because it may have put my TWC into a weird, non-operational state.
Does anyone know how to do a factory reset - like more than just holding reset or power cycling it?
I got all the way to
FF FF and discovered at least 10 undocumented messages the TWC responds to. Unfortunately, most return all zero data whether or not the car is charging. Others have static data or values that randomly change. Nothing shows increasing or decreasing values while charging which might contain a battery state. Nothing has a static value close to 120 or 240V.
FC 19 00 00 00 00 00 00 00 00 00 00 00 00 00 00 caused by TWC to hard lock to the point I couldn't reset it with the reset button. I had to power cycle it. Sometime within the next 20 minutes (perhaps immediately - I didn't notice), the TWCs ID had changed from
032E to
EB30. This change has proven to be permanent. I froze it again with the
FC 19 message and it hard locked again but the ID remained
EB30. Freaky.
During my original test, I noticed
FB 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 was returning an interesting result:
c0 fd 1a 45 56 57 54 53 38 30 48 4c ff 00 ae c0
Over the next couple hours, I tried sending the message I'd discovered with the car unplugged, plugged not charging, and charging at 5A. Each time, I got the same
c0 fd 1a 45 56 57 54 53 38 30 48 4c ff 00 ae c0 response to this message. Then, when I repeated this message twice with the car charging at 5A, I got a different response:
c0 fd 1a 00 00 00 00 00 00 00 00 00 00 00 1a c0
The car stopped charging and 30 seconds later the TWC started sending messages as if it were in Master mode instead of Slave mode. I found that it seemed to be in a reboot loop where the LEDs at the front of the TWC light in this sequence:
All off
3rd green from bottom + middle orange (6th up from bottom)
All off
1st + 2nd green from bottom + middle orange
All off
1st + 2nd + 4th green from bottom + middle orange
All off
Top and bottom green (this normally indicates Master mode)
All off
All green for about a minute. Usually all LEDs only turn green when you hold the reset button for 5+ seconds.
All off, then the sequence repeats from the top.
Can anyone confirm if this is the normal sequence of lights when it boots or when reset is held? I remember it used to do something like this but never watched it closely.
Each time the lights do their cycle, the TWC sends Master linkready1 and linkready2 messages, each time with a different "sign" which is what it would do if you manually reset/rebooted the TWC.
I've tried different things all day to get it out of this mode and I've run out of ideas.
Since this seemed to happen as the result of a message I'd already sent a few times, I'm dubious that the message I sent directly caused this state, though it's possible I sent it during a time that it collided with another message and the TWC
saw the message that got the TWC into this state as a different message than what I'd sent each time before. It's possible that I introduced corruption in the firmware or NVRAM log or something with all the test messages I sent earlier. Maybe it really is just a hardware failure that happened to occur while I was messing with it. I really don't know. But I wanted to recommend others don't follow in my footsteps here as I may not be able to recover from this state.
Things I've tried:
Hold reset button till it restarts.
Power off for 20 seconds, then on again.
Power off. Hold reset before powering on. Held about a minute and gave up.
Power off. Hold reset and charger handle button before powering. Held a minute and gave up. Not surprisingly, this opened my car's charge port.
Power off and change rotary switch to 1, then 0, then F, then E, then 8. No difference in behavior.
Power off, dip switch 2 down. No difference.
Re-send all messages from FB00 to FFFF. The FC19 message that previously crashed it hard no longer crashes it. It responds to a lot of the messages in similar ways to how it used to respond in slave mode.
Hold reset for various lengths of time and tap it up to 30 times in a row.
Let TWC run overnight and hope it exits this weird mode (it did not).
Today I took my 14-50 outlet and converted it to two load sharing HPWCs. First I verified that I had #6 wire to the 14-50 outlet. I upgraded the breaker from 50 Amps to 60 to allow 48 amp changing shared for two cars. A little conduit work and Voila!
Looks nice. Are you using TWCManager or just showing off two TWCs installed on one circuit?