how to check low pressure coolant pump

[Alchemis]

hi guys,

i need some pointers here how to check if my low pressure coolant electric pump is functioning.

i tried using the bleed method (lights on, air con max hot, blower minimum, throttle padel to the metal) i hear some eeeeeeee sound coming from the engine bay... when i go over to the engine bay to check the small tank behind the intercooler, it doesn't have any movement. yes the pump stops around 5 to 10 secs after i lift up the throttle, follow up by a relay click sound.

normally if the coolant is cycling, i should see some movements in the tanks... or at least some mini waves or bubbles or water moving.. but it seems like it's dead still.

i do have an error pop up intermitently saying that electric coolant pump rpm too low. but the error just goes off after a couple of second. this happen when i'm stuck in a traffic and a hot day. that is why i'm trying to see if my coolant pump is functioning.

any ideas ?

[b_w.]

Also needs to be in sport or sport plus. Sounds like the pump needs to be replaced. You should definitely see water circulating. You do have to wait a few minutes for it to spin up. The cycle takes about 10 mins to complete.

[Alchemis]

It's either I can't get the bleed to turn on or I have a dead motor. But isn't a dead motor will throw a permanent error ? Even the rpm low it throws an error. But I don't have a constant permanent error as per the scanning.

[papasmurf_m3]

It takes awhile to start up. You will start to hear some clicking when it starts up and the pump whizzing.

[b_w.]

it very clearly spins up after a few minutes and the coolant will visibly circulate. If it doesnt do that I would bet on replacing the pump. Went through this over the summer.

[Alchemis]

I'm curious why if the pump fails, it did not throw a permanent error. While the error that it throws only lasted for 10 secs and only can be fetch if I were scanning the internal memory