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by dfergenson
Tue May 03, 2022 11:19 pm
Forum: Technical Rav4 EV Discussions
Topic: My own experiences fixing a RAV4 EV not charging/fuse blown issue
Replies: 15
Views: 1469

Re: My own experiences fixing a RAV4 EV not charging/fuse blown issue

Well, I asked for peer review and I got it. And when I'm wrong, I usually want to know it early. And I was wrong. I had asked if anyone else had any insight into the resistance of the fuses. The bottom line is that their resistance is in the low numbers of milliOhms. miimura and I just tested one. S...
by dfergenson
Sat Apr 30, 2022 4:12 am
Forum: Modifications & Accessories
Topic: Introducing OVMS for RAV4 EV
Replies: 24
Views: 5836

Re: Introducing OVMS for RAV4 EV

alflash has a cable specification that he regularly uses to perform remote diagnostics. It's pretty simple and if you're reading the MAC address then I suspect that you already have one that should work. But if you want to test it, you can contact him via his website, alflash.com.ua
by dfergenson
Sat Apr 30, 2022 12:34 am
Forum: Technical Rav4 EV Discussions
Topic: My own experiences fixing a RAV4 EV not charging/fuse blown issue
Replies: 15
Views: 1469

Re: My own experiences fixing a RAV4 EV not charging/fuse blown issue

Thanks, miimura. I just PM'd you my contact information and availability. -Davio
by dfergenson
Thu Apr 28, 2022 8:48 pm
Forum: Technical Rav4 EV Discussions
Topic: My own experiences fixing a RAV4 EV not charging/fuse blown issue
Replies: 15
Views: 1469

Re: My own experiences fixing a RAV4 EV not charging/fuse blown issue

This is a good point. If anyone has a tightly controlled constant current power supply in the same geographic area, we can also perform the test and get at least a rough idea of the resistance of the fuses.
by dfergenson
Thu Apr 28, 2022 1:57 am
Forum: Technical Rav4 EV Discussions
Topic: My own experiences fixing a RAV4 EV not charging/fuse blown issue
Replies: 15
Views: 1469

Re: My own experiences fixing a RAV4 EV not charging/fuse blown issue

Request: Is there anyone in the greater San Francisco Bay Area as far inland as Sacramento who would be willing to lend me a milli ohmmeter or just let me make a couple of measurements on yours while you watch? Otherwise, if anyone in the community has an A50P50-4 and a milli ohmmeter, could you mea...
by dfergenson
Tue Apr 26, 2022 6:40 pm
Forum: Technical Rav4 EV Discussions
Topic: My own experiences fixing a RAV4 EV not charging/fuse blown issue
Replies: 15
Views: 1469

My own experiences fixing a RAV4 EV not charging/fuse blown issue

RAV4 EV charging issue case study for MyRAV4EV forum: I’m writing to document my successful resolution of a RAV4 EV charging issue caused by a blown fuse in the onboard charger. There is substantial overlap between my issue and this thread (http://www.myrav4ev.com/forum/viewtopic.php?t=2463&sid=...
by dfergenson
Mon Dec 14, 2020 12:33 am
Forum: Technical Rav4 EV Discussions
Topic: Check EV System Message - My particular case/solution
Replies: 15
Views: 13677

Re: Check EV System Message - My particular case/solution

I'm not sure what information the dealership provides as part of the diagnostic service. But since they would want to provide service based on the diagnostics, I would assume that they've provide enough information at least to explain what they would do to repair the car and why. Perhaps they'd prov...
by dfergenson
Sun Dec 13, 2020 7:41 pm
Forum: Technical Rav4 EV Discussions
Topic: Check EV System Message - My particular case/solution
Replies: 15
Views: 13677

Re: Check EV System Message - My particular case/solution

This is what Toyota of Palo Alto says about the service: A trained technician will analyze (diagnose) your concern. As a result of diagnosis, an estimate for repairs or additional diagnosis as required will be provided to you. Diagnosis fee does not include cost of parts and/or labor to complete rep...
by dfergenson
Fri Dec 11, 2020 5:12 am
Forum: Technical Rav4 EV Discussions
Topic: Check EV System Message - My particular case/solution
Replies: 15
Views: 13677

Re: Check EV System Message - My particular case/solution

Yes, the fourth pump is the cabin heater pump. I think that the pumps fail more often than they do on ICE vehicles because, while an ICE vehicle runs its water pumps only when driving, an EV runs them when charging, too. Since charging is at fewer MPH than driving, they run them >> more. As for not ...
by dfergenson
Wed Dec 09, 2020 6:35 am
Forum: Technical Rav4 EV Discussions
Topic: Check EV System Message - My particular case/solution
Replies: 15
Views: 13677

Re: Check EV System Message - My particular case/solution

The Lingenfelter pump manual said to maintain 2 Hz +/- 0.2 Hz. They compare their pump performance to Bosch (and I think that the Tesla and Toyota pumps are actually Bosch) so I figured that, if it was intended as a replacement for those pumps, the same frequency would work. As for the 50% duty cycl...

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