I have a 2007 Chrysler Pacifica 4.0L V6, about 195K miles. When I last went to drive it I noticed the cooling fan started running at startup and it doesn't stop until the car is shut off. This was on a cold start with no A/C. I can reproduce it at every startup.
I plugged in my scan tool, I don't have any stored codes or CEL. Reading live data with engine running (fan on), all temps are normal (coolant temp, ambient air, trans oil temp, A/C not engaged, etc). The "low speed fan commanded" and "high speed fan commanded" variables are both false, so it appears the PCM is not asking for the fan. What's interesting though is that the fan won't run with the ignition switched to on. You actually have to start the engine and there is about a 2-3 second delay before fan kicks on.
Curious if there are any common culprits for this condition before I go chase down wiring diagrams and do a deep dive into the fan circuit. Appreciate any insight!
I plugged in my scan tool, I don't have any stored codes or CEL. Reading live data with engine running (fan on), all temps are normal (coolant temp, ambient air, trans oil temp, A/C not engaged, etc). The "low speed fan commanded" and "high speed fan commanded" variables are both false, so it appears the PCM is not asking for the fan. What's interesting though is that the fan won't run with the ignition switched to on. You actually have to start the engine and there is about a 2-3 second delay before fan kicks on.
Curious if there are any common culprits for this condition before I go chase down wiring diagrams and do a deep dive into the fan circuit. Appreciate any insight!
