BMW i3 BEV non REX. Cool. temp. +118C

[Vanquisher]

Hello everyone.
BMW i3 2019 BEV non REX!
I have such a problem, the coolant temperature in the service menu is +118 C.
When the car is turned on, the fan immediately turns on and the radiator blinds open.
The error is only 8011AF: Evaporator temperature sensor: sho circuit to plus or interruption
Сhecked the sensor - the resistance is normal.
Please tell me where this sensor is located and what could be the problem?

 

[alohart]

It's been a while since I looked at the service menu. However, I recall a temperature reading that made no sense. I assumed that this was due to no such temperature sensor existing. Hopefully, others will respond.

Nevertheless, there's a problem somewhere. In an i3 with a heat pump, the heat exchangers in the cabin and behind the air intake below the front bumper can be either an evaporator or a condenser depending on whether the heat pump is cooling or heating the cabin.

Look up the DTC at bmw fault codes. I assume that the ECU version is ihka01 because the i3 model is 01. When the fault info is viewed, there's a bit more diagnostic info that might help.

 

[Vanquisher]

It's been a while since I looked at the service menu. However, I recall a temperature reading that made no sense. I assumed that this was due to no such temperature sensor existing. Hopefully, others will respond.

Nevertheless, there's a problem somewhere. In an i3 with a heat pump, the heat exchangers in the cabin and behind the air intake below the front bumper can be either an evaporator or a condenser depending on whether the heat pump is cooling or heating the cabin.

Look up the DTC at bmw fault codes. I assume that the ECU version is ihka01 because the i3 model is 01. When the fault info is viewed, there's a bit more diagnostic info that might help.

Thanks a lot for the reply!
I replaced the heat pump controller, the errors disappeared. The coolant temperature in the service menu remains +118 C.
At an outdoor air temperature of -2 C, the radiator blinds and the radiator fan turn on when the car starts.
Please tell me whether the radiator blinds should open and the fan turn on at startup or only at a certain temperature of the car's coolant?
The A/C on the climate control panel is enabled.

 

[Dutchi3]

Please tell me whether the radiator blinds should open and the fan turn on at startup

My radiator blinds do open at startup, but I did not pay enough attention to it to say it always does. My fan does not turn up at startup, when they are off when shutting down the car. That is the interior air inlet fan by the way. Don't know about the coolant fan, I do not hear that so often so I presume only at a certain temperature.That would fit the philosophy of utmost efficiency of the design.

 

[alohart]

At an outdoor air temperature of -2 C, the radiator blinds and the radiator fan turn on when the car starts.
Please tell me whether the radiator blinds should open and the fan turn on at startup or only at a certain temperature of the car's coolant?
The A/C on the climate control panel is enabled.

I don't know how the radiator vanes behave. Our former 2014 BEV with a heat pump but without seat and battery pack heaters did not have these radiator vanes. Our former 2019 BEV with a heat pump and our current 2021 BEV without a heat pump but both with seat and battery pack heaters have radiator vanes.

The A/C button being enabled I believe allows the compressor to turn on when necessary. If this button is disabled, does the behavior of the radiator vanes and heat exchanger fan change?

The heat exchanger fan should turn on when heat needs to be transferred but when forward motion is insufficient. It's so quiet that I haven't noticed when it's on or off. It seems a bit odd that it would turn on immediately upon starting your i3 before any heat would need to be transferred.

 

[Vanquisher]

I don't know how the radiator vanes behave. Our former 2014 BEV with a heat pump but without seat and battery pack heaters did not have these radiator vanes. Our former 2019 BEV with a heat pump and our current 2021 BEV without a heat pump but both with seat and battery pack heaters have radiator vanes.

The A/C button being enabled I believe allows the compressor to turn on when necessary. If this button is disabled, does the behavior of the radiator vanes and heat exchanger fan change?

The heat exchanger fan should turn on when heat needs to be transferred but when forward motion is insufficient. It's so quiet that I haven't noticed when it's on or off. It seems a bit odd that it would turn on immediately upon starting your i3 before any heat would need to be transferred.

When the A/C button is off, nothing changes.
I think that when you first start the car while the car is cold, the radiator blinds should not open and the radiator fan should not turn on, because the car should heat up.
It seems to me that due to the coolant temperature in the service menu +118C, the machine constantly thinks that the coolant is too hot and needs to be cooled.
Again, this is my guess, maybe that's how it should work.

 

[alohart]

I think that when you first start the car while the car is cold, the radiator blinds should not open and the radiator fan should not turn on, because the car should heat up.

When climate control is on and it's either cold enough for cabin heating or warm enough for cabin cooling, heat would be transferred from or to ambient air, so the vanes should be open and the fan on if the car isn't moving forward. However, I don't know whether this would happen immediately upon starting an i3 because it would take some time for the heat exchanger to need some air flow.

It seems to me that due to the coolant temperature in the service menu +118C, the machine constantly thinks that the coolant is too hot and needs to be cooled.

I'll take a look at the service menu on our BEV to refresh my memory. I think I've always seen an irrational temperature for something, but I don't recall what.

Does climate control seem to work correctly? If the evaporator temperature sensor is bad, the compressor probably wouldn't turn on so warm or cool air wouldn't be blown into the cabin.

The sensor is above the passenger footwell. Remover the same covers that must be removed to change the cabin air filters.

 

[alohart]

When our 2021 U.S. i3 without a heat pump and with seat and battery pack heaters is off, the grill vanes are closed and the front heat exchanger (A/C condenser) fan is off.

When our i3 enters drive ready state with climate control off, the vanes remain closed and the fan remains off.

When our i3 enters drive ready state with climate control on auto (A/C button LED on), the vanes open and the fan turns on.

The coolant temp. is +118 ºC. I recall the same spurious coolant temperature on our 2014 and 2019 i3's as well, so this doesn't indicate any problem.

 

[Vanquisher]

When our 2021 U.S. i3 without a heat pump and with seat and battery pack heaters is off, the grill vanes are closed and the front heat exchanger (A/C condenser) fan is off.

When our i3 enters drive ready state with climate control off, the vanes remain closed and the fan remains off.

When our i3 enters drive ready state with climate control on auto (A/C button LED on), the vanes open and the fan turns on.

The coolant temp. is +118 ºC. I recall the same spurious coolant temperature on our 2014 and 2019 i3's as well, so this doesn't indicate any problem.

View attachment 1753

Thank you very much for the answers.
So there are no malfunctions in my car)

 

[alohart]

So there are no malfunctions in my car)

I don't think that the heat exchanger vanes should open and the front heat exchanger fan turn on when you start your i3 with climate control off, if that's what happened.