Humming/whirring noise while charging at Level II

palmermd said:

cliff said:

palmermd said:

I'm guessing this is the part.... 215813NA0A

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I also think that looks like water pump 1, but can not confirm.
Since you say your pump does not make noise, and you did not
mention further diagnostics after viewing the DTC, thought I would
mention steps from the service manual:
1st it says make sure 12 volt battery reads above 11 volts with car off.
Make sure this is the only DTC seen
(it is the value seen by the VCM that causes this DTC).
check fuse 71, which is in the box behind the battery, middle column, bottom
fuse(next fuse up is for water pump 2).
Check the voltage at pin 1 of water pump for 12 volts.

Note: pin 4 is the control pwm in, and pin 3 the out pwm.
I believe that not matching is what causes the DTC.

Though there is a mistake in the service manual here, where
they describe what the pwm signal should look like. On the VCM
pins they describe both in, and out as in, and show the same signal
picture, so hard to tell if they should look alike.

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Awesome! I'll dig in this weekend and report back here what is discovered.

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