Hi Lawrence, This is likely one of two basic things: - either the EVSE does not present the correct signal on the pilot for the car to detect that it is plugged in - or the car does see a correct Pilot and does respond, but the EVSE is not seeing the change in the pilot state, so it continues to say that the car did not request a charge.
There is a chance however that the Leaf checks the Proximity in addition to the Pilot signal and if it does not see the Proximity resistance go to 150 Ohms (for example a dirty switch in the Proximity circuit in the "pistol") then the car never requests a charge If it is the two basic things that I sketched, then either the J1772 pilot driver in the EVSE is broken, you can check if you see a continuous +12V on the pilot before plugging in, then a switching signal between +9 and -12 as soon as the plug is in the car (car presents a diode and 2k7 resistor in series), followed by the car requesting a charge by loading the pilot more by adding a 1k3 resistor in parallel to the 2k7 which means that the pilot is now seeing a diode and approx 880 Ohms in series. This changes the pilot into a signal switching between +6 and -12V. If you do see this progression of voltages (the second one may be too short to measure) then the fault is likely in the EVSE not detecting that the car is requesting a charge, its detector may be at fault. You find the info also on the J1772 Wiki https://en.wikipedia.org/wiki/SAE_J1772 BTW, if you see the J1772 signal get to the stage 2 (+9V) but the car not requesting the charge, so not loading the pilot down to +6V then it is likely not seeing the resistance on the proximity pin, it needs 150 Ohms to ground to tell the car that it is plugged in and the unplug latch is not pressed. Hope this helps, Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Lawrence Rhodes via EV Sent: Wednesday, April 13, 2016 9:14 AM To: [email protected]; [email protected] Subject: [EVDL] Your EVSE talks to your car? What are they talking about? It seems that in J1772 speak the EV must request a charge from the EVSE after connection. If so might this be a way of diagnosing problems. At this point my ICS-200B says my EV(a Nissan Leaf) did not request a charge. Does that mean they aren't best buds? Should I try a timer request? Lawrence Rhodes -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160413/3df99c3d/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
