Hi friends,
I have read much about failing fan controllers and cooling fans, and tried everything I know of. Neither fan engages even with A/C running, and allowing the coolant temperature to reach 240 F. My understanding is that the A/C fan should engage immediately, and the larger fan should engage around 210-220 degrees F. Current state of my 2011 XC60 T6 is as follows:
My questions for those smarter than I am:
Is there any other reset within the ECU or fuse panels that should be done to initialize the new fan controller?
Is there a way to test the small third connection from the wiring harness - presumably the one sending signals from the ECU/temperature sensor?
How can I test the fans without potentially damaging them? I'm nervous about connecting 12 volt battery leads directly to the red/black wire leads on the two smaller fan connectors, so I do not know for sure if the fans operate at all. I also don't have the diagnostic app I've seen mentioned here that can fire up the fans manually via computer.
Thank you to anyone who can help!
I have read much about failing fan controllers and cooling fans, and tried everything I know of. Neither fan engages even with A/C running, and allowing the coolant temperature to reach 240 F. My understanding is that the A/C fan should engage immediately, and the larger fan should engage around 210-220 degrees F. Current state of my 2011 XC60 T6 is as follows:
- New thermostat and coolant temperature sensor
- Coolant recently flushed/replaced and not leaking
- Air conditioning works great until the car starts to overheat a bit, at idle (classic symptoms of fan trouble).
- New fan assembly
- New Volvo genuine fan controller from the dealer (previously tried both a $30 amazon one - didn't work, and a more expensive Gates one - didn't work). This controller, and the others, gets quite hot quickly as the car gets up to temperature - I'm not sure if that's normal.
- Tested the 80-Amp fuse, it's good, although the top post for this fuse has been sheared off to half it's normal length, maybe during replacement by a prior owner/mechanic. But the fuse is still solidly connected and reads with a good current when tested with circuit testing light.
- The large wiring harness that goes into the fan controller has current and proper ground, as tested with a circuit testing light connected to negative battery terminal for current, positive battery terminal for ground.
- No active OBD2 codes. (I'm using a BlueDriver bluetooth OBD2 sensor and app to scan for codes and to monitor coolant temperature live.)
My questions for those smarter than I am:
Is there any other reset within the ECU or fuse panels that should be done to initialize the new fan controller?
Is there a way to test the small third connection from the wiring harness - presumably the one sending signals from the ECU/temperature sensor?
How can I test the fans without potentially damaging them? I'm nervous about connecting 12 volt battery leads directly to the red/black wire leads on the two smaller fan connectors, so I do not know for sure if the fans operate at all. I also don't have the diagnostic app I've seen mentioned here that can fire up the fans manually via computer.
Thank you to anyone who can help!
