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The fuse under the MCU cover is there to protect the wires to the OBC and is very unlikely to fail until something in the OBC does.

Kenny sent me a DCDC board from another OBC and I've installed it, however it is not charging the aux battery. I still have the same fault lights on the dash and the 12V doesn't go up. I wonder whether I have to clear the fault from the CAN bus?

While I am waiting for Kenny to repair my DCDC board, if he can, I have a working OBC. I reinstalled it without a DCDC board and replaced the aux battery with two 30ah LiFePO4 12v batteries. I replaced the plastic battery tray with a piece of 2x6 that was thinned by about 1/8 in and...

The owners manual says it can be changed by the button under the multifunction display.

PM sent.

Thanks for finding a source. But Arrow wants $50 for shipping! I have no experience with smd devices or multilayer pc boards. Rather than learn on this one, I prefer to buy one if possible or find someone to repair the one I have. I doubt I can effectively determine what was the original...

The system uses a 120 amp fuse link on the right side of the positive connector to recharge the battery.

Looking for a good dc-dc converter control board for a 2012 iMiev, nichicon #PA4091RP60.

When I looked for the part number in the list, the best I found was that it is an obsolete part. Where can I find a suitable replacement?

My results are discouraging. I found 15v on the 5v buss. Q229 still checks as a good transistor, so I assume IC209 is damaged. Without being able to power up the LV section, I don't see a way to continue.

The power supply finally arrived. As I considered how to hook it up I discovered that none of the GND pads on the top of the board are connected to each other or pin 1 or CN201. So it seems I must remount the board in the chassis or create a system to connect the pads. Is it possible that...

I read 6.28k and 4.55k across C242 and C249 respectively. I assume those have to do with other current paths in the circuit. I've ordered a power supply with adjustable current limiting to try to test the 5v via TP201.

That seems to be unlikely to me. As I recall, the negative probe was in one of the screw holes of the chassis where it was for other checks and there was no reading until I twisted the positive probe in the vias to make contact on each leg.

When I got past the coating Q229 checked out OK. The vias showed continuity also. So I don't understand why I was reading 0.28v when I checked the vias when the board was powered up.

I found a chart for 100K thermistor at https://mikroelectron.com/ProImg/X4/186d503e-bf2a-4279-ac77-9b94ce1f0c80.png. It looks like 10K corresponds to 180 F. I've been puzzled that I had been reading 5v at the gate of Q203 and only 0.28v at the vias feeding 5v to IC202. Checking Q229, all I...

So the switched 12v supplies several functions when the key turns it on, but can be powered from another source when charging with an EVSE. How is that commanded when there is no connection from CN201 and the EVSE connector?

Thanks for the advice. When I opened the image in a new tab the values and labels are much more readable.

I find it difficult to read the resistor values in the drawings, so I want to ask for an explanation of the functional properties of the comparator and signal processing of their outputs. It looks like A & B sections determine that a 5v power ail is between certain limits and there is feedback...

I was checking around to verify that my batteries were supplying enough voltage to have a working board. When I tested Vsub I read 0 and probed the terminals of Q110 to see why. I'd forgotten that I should be checking with my other probe on the HV neutral. :oops:

Thanks for the research and explanations. I found only 0.28v at both of those vias. But I've now created a larger problem. My probing created an arc around Q110 and blew R129 off the board and I believe Q110 has failed and some of the copper is melted. I can't read any value for the loose...