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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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Thread Tools | Display Modes |
06-24-2018, 02:07 PM | #11 | |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
Quote:
Everything of interest was the Undervolt Cutback at hourmeter 709.9 and after that. The logic section has a large electrolytic capacitor that maintains the 5 volts for a while after the key is turned off. This is why a programming station will stay connected for a while even after the key is turned off. The handset shuts off much sooner because it is powered by a 15V regulator from the 48V keyswitch input. Once the keyswitch (or main 48V) is shut down, the MCU does some housekeeping tasks before shutting off. This includes transfer of prior data from lower memory to higher memory, import of uploaded data from high memory to lower memory, and updating the logs. When a controller is totally destroyed, that housekeeping does not take place. In your case, the 5V power supply was destroyed, but the crowbar prevented damage to the MCU core itself, so it completed its housekeeping before shutting down, preserving logs of everything that happened. It recorded the end of signal from your encoders, throttle, brake, and both halves of the motor speed encoder. It actually recorded 255 attempts to communicate with each of the encoders, the maximum it will record. It will overwrite old attempts and store the last 255 error messages of each type, and the hourmeter readings of when they occured. I saved those log entries, then tried re-establishing normal operation with the test bench. It would not recongize any of the 5V encoder signals from new external encoders, which means the encoder inputs are dead. I tried for 30 minutes to manipulate inputs and trigger outputs... it's telling me it's activating outputs, but the outputs are not activating. Every output has sensor inputs to detect the state of those outputs. Externally manipulating those states is not being read, so even those inputs are dead. It's like a person that has had a spinal cord injury... the brain is fully functional, but the signals in and out of the brain are not communicating with the body. It's paralyzed in an electronic sense. The com port is not affected because it is a direct I/O with the MCU, and is a seperate system from the normal I/O lines. By remotely powering the logic section, I'm essentially putting it on life support, able to communicate with it and read its memory of what happened, but I cannot get it to communicate with anything else outside of the com port. I suspect that all of the interface chips that surround the MCU are fried, and are the reason that it cannot communicate further. The only way to verify this is to order parts and start changing interface chips, and see if that starts waking up the inputs and outputs. I was trying to contact you a few days ago to see what you wanted to do. I sent the email and waited for a response. When I did not get an email response on saturday, I decided to post here to see if you would read the message here and check your email. The decision is yours. Do you want me to continue with an attempt to repair, or do you want to buy that replacement controller you found? The number of parts to replace might make it more econimical to replace, but I won't know that until I price the parts and begin the process. I've not attempted a repair of this magnitude before with a Curtis controller, usually they are brain-dead and not able to communicate with this level of damage. I was suprised that it communicated! Bob |
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06-24-2018, 11:51 PM | #12 |
Not Yet Wild
Join Date: Jun 2018
Posts: 11
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
Wow, what an incredible write-up! Again thanks for your time and attention to date. I think the next step is to buy a replacement controller. Is this something I can get thru you? I'd like to be able to compensate you for all your hard work.
Sent from my BTV-W09 using Tapatalk |
06-25-2018, 01:57 AM | #13 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
I don't think he offers new controllers, but sending a few bucks his way probably wouldn't hurt, if he will accept it.
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06-25-2018, 03:31 AM | #14 |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
cgtech is correct, I don't sell controllers. But I'll sometimes do a swap for a repaired controller when I have one available.
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07-07-2018, 06:13 PM | #15 |
Not Yet Wild
Join Date: Jun 2018
Posts: 11
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
Ok, installed the replacement 48V curtis controller on my 2013 RVX. I *think* i got all the wires re-connected including the solenoid.
Curious - can I use my voltmeter to check if I missed something? I'm getting 48V across the big red and big black on the solenoid, and 0V across the small red and small black (both with switch on and off). However, when I turn the ignition, I don't hear the solenoid click, or the reverse beeper go on, like it did before my big mistake. In the front console, I am still getting 0V on the red/black/grey wires, where I was previously getting 48V before shorting them. I'm still getting 12V on the yellow and grey wires, as I did before. I have not yet replaced the 5v throttle encoder? hoping I didn't need to. Can I use my voltmeter to verify I reinstalled the controller correctly and at least rule that part out? Thanks!!!! |
07-07-2018, 08:10 PM | #16 | |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
Quote:
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07-08-2018, 12:48 AM | #17 |
Not Yet Wild
Join Date: Jun 2018
Posts: 11
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
That was it, one fuse was blown. I swapped in a new one and am now back up and running!
Can't say enough thanks to Bob for all his help!!!! Sent from my BTV-W09 using Tapatalk |
07-08-2018, 06:05 AM | #18 |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: EZGO RVX 2011 - 12V Lights etc, work, all 48V curcuit and solenoid dead after my
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electical connections, ezgo rxv |
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