Diode inside traction battery

Mtn schrieb: Yes, I'm not sure if my diode is broken. I have no circuit diagrams, without them it is very difficult to look for a breakdown. This happened while charging from the home network.
Diagnostic results using elm327.
1. DF192 No multiplex signal from BMS
2. DF193 No multiplex signal from BMS
3. DF313 No multiplex signal from BMS
4. DF314 No multiplex signal from BMS
5. DF512 No multiplex signal from BCB
6. DF496 No traction battery ECU

These error codes sign to a problem with a connector.
Check all connections around the battery, always both parts, plug and socket.
As the error appears while trying to charge the battery, the main relais is not needed.
So I suppose that the problem is neither caused by the diode nor by the relais nor by the 500A fuse.

In the past, several times the connector between the charger and the battery caused problems.

Derk schrieb:

Mtn schrieb: The diode has no contact on both sides, i.e. it shows "0". Am I doing it right? If I'm wrong please correct me

You can't test the diode with a standard multimeter, unless it (the diode) died in a short circuit. Typical breakthrough voltage (when it starts to conduct) is way beyond the voltage supplied by the Multimeter when reading pass-through or resistance. The diode's purpose is overvoltage or transient protection, so unless you apply a suitable high transient voltage, it won't conduct.

I happen to have access to suitable testing equipment (pulse voltage generator) and would be able to verify the diode's functionality, but I don't think it's worth the effort. The problem seems to be elsewhere.

Regards,
Derk

Yes, you're right, I spent the evening learning the theory and methods of testing diodes. Probably the problem is not in the diode. thanks for your help

One more time....
Did you check the funktion of the relais?
Did you check the 500A main fuse?

I have checked all fuses and two relays, they work well. They are normally open, when connected to 12 volts they are closed. Today I will continue to look for the cause.

Hello and good morning.you have checked the fuses and relays in the fuse box ! The relay and the 500 A fuse are installed inside the tracktion battery !!! To check the things, the drive battery must be removed and opened. Checking the connector on the traction battery would also be important! Greetings Helmut

Hupferdriver schrieb: Hello and good morning.you have checked the fuses and relays in the fuse box ! The relay and the 500 A fuse are installed inside the tracktion battery !!! To check the things, the drive battery must be removed and opened. Checking the connector on the traction battery would also be important! Greetings Helmut

Hallo! Yes, of course I checked the relays and fuses inside the traction battery. Dismantling the battery was not an easy task in my garage. I also checked all the connections, and it is clean and there is no overheating. Of course, I learned all the precautions before dismantling.

Mtn schrieb: I also checked all the connections, and it is clean and there is no overheating.

Then I´m afraid that the charger is damaged, or even more worse, the BMS is damaged.

Btw: Where are you from?

Snorre schrieb:

Mtn schrieb: I also checked all the connections, and it is clean and there is no overheating.

Then I´m afraid that the charger is damaged, or even more worse, the BMS is damaged.

Btw: Where are you from?

I also disassembled the charger, everything is dry and there is no corrosion. The fans spin while charging. I don't have enough knowledge to diagnose BMS. I'm from France, Grenoble.

In any case, I will continue to search for the cause of the failure and let you know if there is success.

I don't know where to buy circuit diagrams for Twizy. Renault sells access to its repair materials only to professionals. I will be glad if someone will share with me the circuit diagrams.

If you know a ZE dealer, you can ask if he can print you a copy of the wiring diagram. Otherwise there is little chance. The possible main sources of error have already been explained to you. Greetings Helmut

Mtn schrieb: This happened while charging from the home network.
Diagnostic results using elm327.
1. DF192 No multiplex signal from BMS
2. DF193 No multiplex signal from BMS
3. DF313 No multiplex signal from BMS
4. DF314 No multiplex signal from BMS
5. DF512 No multiplex signal from BCB
6. DF496 No traction battery ECU

Mtn schrieb: The fans spin while charging.

I´m confused!
Your photo and all these error numbers!
Charging will not be possible in this status!
How can you tell us, that the fans spin while charging?

Snorre schrieb: How can you tell us, that the fans spin while charging?

Because you hear them running.

Rebound schrieb:

Snorre schrieb: How can you tell us, that the fans spin while charging?

Because you hear them running.

I`m quite sure that in the state shown above, there will be no charging and no running fans, too!
When I´m charging my Twizy, I can hear the spinning fans too.
But when there is an error, the fans don´t spin!
Or am I mistaken?

Snorre schrieb:

Rebound schrieb:

Snorre schrieb: How can you tell us, that the fans spin while charging?

Because you hear them running.

I`m quite sure that in the state shown above, there will be no charging and no running fans, too!
When I´m charging my Twizy, I can hear the spinning fans too.
But when there is an error, the fans don´t spin!
Or am I mistaken?

Yes, I can hear the charging fan very well.

Are there any other devices connected to the CAN Bus (like over OBD interface) than the onboard units? Some extra devices are known for "flooding" the CAN bus with messages and thus blocking the normal communication.

Snorre schrieb: ...But when there is an error, the fans don´t spin!
Or am I mistaken?

Bei mir lief NUR der Lüfter, als mein Lader die Grätsche gemacht hat.

green_fox schrieb: Are there any other devices connected to the CAN Bus (like over OBD interface) than the onboard units? Some extra devices are known for "flooding" the CAN bus with messages and thus blocking the normal communication.

no other devices are connected