Hi,
As far as the IPDM, all you can do is check for power in and out. I attached a pic below. First, make sure the fuse in the picture is good. In addition to checking the fuse, make sure there is power to it and out from it.
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Also, make sure the relay is good. You can switch it with a different one having the same part number or here is a test for checking a relay.
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
If the power is good at the relay/fuse, then check at the pump for power. See pic 2. If power is at the pump, then either the pump is bad or there is a bad ground.
As far as the cooling fan, lets focus on one thing at a time.
Let me know what you find or if you have other questions.
Joe
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Monday, August 24th, 2020 AT 1:40 PM