... 2. Can you formulate in one sentence of no more than 10 words the main purpose of the entire HVIL line fragment that is in the Charger?
Gentlemen,
60.4Ω resistor is soldered betw pins 3 & 9 on X042 (can you tell? It's all black (shrink tubing)).
Time to put OBC and the rest back on car and test it.
I'll be back with the result with the preservation of the functions of the system
To verify that no high voltages are open to touch.Questions for the participants.
1. Can you formulate in one sentence of no more than 10 words the main purpose of the entire HVIL line?
2. Can you formulate in one sentence of no more than 10 words the main purpose of the entire HVIL line fragment that is in the Charger?
There is a more beautiful and correct solution
https://alflash.com.ua/2019/to_rav4ev/ch_hvil.jpg
Yes, I agree. And in the charger, this is done by a jumperTo verify that no high voltages are open to touch.
Ten by the rule.
A reed switch is a sealed contact pair that closes under the influence of a magnetic field. Removing the charger cover removes the magnet and the reed switch opens, and the HVIL circuit is open.Thanx, but little bit too late. Next time.
Is the Reed Switch actually a diode?
What are the specs of this component, please?
p.s. As Tesla teaches, "opening the lid while driving", that is, opening the HVIL line while the car is moving, will not cause the contactors to open.Probably in case somebody opens the OBC lid while driving![]()
p.s. As Tesla teaches, "opening the lid while driving", that is, opening the HVIL line while the car is moving, will not cause the contactors to open.
Without the external jumper J5, you'll never get a reading at X042 (D4) 3 & 9. It's a required loopback to complete the HVIL circuit.However, all the checks are made with lid & side frame off. In other words, J5 was out !
Should I repeat the tests with the frame and J5 inserted?
Gentlemen,
60.4Ω resistor is soldered betw pins 3 & 9 on X042 (can you tell? It's all black (shrink tubing)).
Without the external jumper J5, you'll never get a reading at X042 (D4) 3 & 9. It's a required loopback to complete the HVIL circuit.
In other words, the jumper in the RAV4EV charger is an atavism that does not perform the main protection function, but which must be present so that the HVIL line is not broken....
[A non-sequitur here, but for future readers: the external jumper J5's purpose is to allow interfacing with the Rear HVJB's Lid Switch in a Tesla Model S/X. It's also used when an optional Dual Charger configuration was purchased for those models, as the second OBC doesn't interface with the Rear HVJB. Since there is no Rear HVJB in the RAV4 EV, there's a jumper installed -- always.]
I put the OBC in the car and connected all the cables, including HV & AC.
Connected my little harness to X042 and checked pins 3 & 9. It first jumped around, then showed 67 Ohms.
I did another measurement, this time it stabilized at 72 Ohms.
As you have now installed a permanent 60 ohm resistor inside the OBC, I would suggest removing the J5 jumper. If the open circuit was caused by a trace lifting off a PCB, it's possibly that this same trace could someday re-establish contact, creating another 60 ohm resistor in parallel. I can't say for sure if the BMS would care about 30 vs 60 ohms, but removing J5 jumper ensures this won't be a possibility.
Hopefully you now have a green light in TPD for the HVIL![]()
By the way, Tesla could have avoided the "slalom" of the HVIL line wires in the charger, and installed a 60 Ohm resistor in this jumper. As it was done for the Proximity resistor (2.7 kOhm) of the charging port.If this turns out to be the permanent solution, I'd be concerned about someone in the future reinstalling the jumper thinking it's just missing. I'd either clip one of the wires inside, or put a label on the outside stating it shouldn't be installed.
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