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2009 International 4300 Dt466 Fan clutch stays engaged at

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2009 International 4300 Dt466 Fan clutch...
2009 International 4300 Dt466
Fan clutch stays engaged at all times. need to know if the engine coolant temp sensor is the same thing as a Thermal Switch.
Submitted: 1 year ago.Category: Medium and Heavy Trucks
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Answered in 2 hours by:
11/9/2016
Technician: Alex Olsen,
 replied 1 year ago
Alex Olsen
Category: Medium and Heavy Trucks
Satisfied Customers: 190
Experience: Lead technican at Astleford international trucks
Verified

hi I'm alex could I get the last 8 of your vin?

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Customer reply replied 1 year ago
9h163642
Technician: Alex Olsen,
 replied 1 year ago

OK thank you

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Technician: Alex Olsen,
 replied 1 year ago

Looks like this is a Horton drive master 2spd

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Customer reply replied 1 year ago
ok. I am inside of a bay and don't get great reception.
Technician: Alex Olsen,
 replied 1 year ago

I have terrible reception where I am at as well, I can call whenever it is convenient

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Customer reply replied 1 year ago
now or chat. it don't matter
Just need the proper diag for this truck
Technician: Alex Olsen,
 replied 1 year ago

Do you have any software to read ECM or body controller?

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Customer reply replied 1 year ago
Jpro
Customer reply replied 1 year ago
But currently not with the truck. Back to the question though. I have continuous air coming out of the Fan Solenoid to the fan clutch. Need to know what the Thermal Switch is?
Technician: Alex Olsen,
 replied 1 year ago

Coolant temp sensor? where are you getting thermal switch from?

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Technician: Alex Olsen,
 replied 1 year ago

Fan is controlled by both the ECM and body controller for a/c

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Technician: Alex Olsen,
 replied 1 year ago

It doesn't have high coolant temp I assume

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Customer reply replied 1 year ago
A/C high pressure switch and the thermal switch. that is the information that I have found. Thermal switch I was think was a veg term for coolant temperature.
Customer reply replied 1 year ago
No high coolant. Fan was on at 135 F according to JPro.
Customer reply replied 1 year ago
Fan stays engaged at all times. I pulled the air line from the solenoid and I have continuous air out the solenoid. I unplugged the two prong plug conector from the solenoid and the air stops..... All this while the truck is under 140 F
Technician: Alex Olsen,
 replied 1 year ago

Ok seems to me the body controller is probably requesting fan on for high a/c pressure

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Technician: Alex Olsen,
 replied 1 year ago

Does not mean it actually has high a/c pressure but body controller might think it does

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Customer reply replied 1 year ago
all with the A/C off.
Technician: Alex Olsen,
 replied 1 year ago

Yeah it is possible body controllers sometimes have a mind of there own

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Customer reply replied 1 year ago
ok in short truck needs to go to the dealer and have the BCM Diag
Customer reply replied 1 year ago
The operation isA/C High pressure switch
Thermal Switch
ECM
Fan Clutch Solenoid
This is all according to Horton Tech Document
Technician: Alex Olsen,
 replied 1 year ago

Yeah if you have power at the solenoid something is requesting fan on. Do you have a fan status parameter on your jpro

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Customer reply replied 1 year ago
it is bi directional but no commands for the fan. I will have to contact Jpro people to ensure I have it.
Customer reply replied 1 year ago
To recap, you don't think that it is a Thermal Switch or Coolant Switch, it is the BCM
Technician: Alex Olsen,
 replied 1 year ago

Yeah like in servicemax we have a fan status parameter and it will say like "a/c" when fan is on because of a/c high pressure

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Technician: Alex Olsen,
 replied 1 year ago

Well its not showing high coolant temp and that's what the ECM looks at for fan control

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Technician: Alex Olsen,
 replied 1 year ago

You have 12 v at the solenoid all the time right

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Customer reply replied 1 year ago
that is correct. all while under 140 F
Customer reply replied 1 year ago
Ok I am good from here we can end the session.
Technician: Alex Olsen,
 replied 1 year ago

We can keep it open if you need more help

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Customer reply replied 1 year ago
I would like more info. I have mitchells and the wiring diagram don't show a BCM, just the ecm.
Technician: Alex Olsen,
 replied 1 year ago

Was the solenoid replaced?a normally closed solenoid in place of a normally open one?

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Customer reply replied 1 year ago
anyways I am loosing money on this. I will contact the owner and will give him the update. It still needs a new fan Clutch.
Customer reply replied 1 year ago
I have no past information on this truck.
Customer reply replied 1 year ago
if it was it would shut off when I unplugged the wiring
Customer reply replied 1 year ago
I am sure that it is the correct Fan Clutch Solenoid
Technician: Alex Olsen,
 replied 1 year ago

If you have it hooked up to DLB software it will tell if BCM is requesting fan on

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Customer reply replied 1 year ago
ok we can end the session now. thank you for your time.
Technician: Alex Olsen,
 replied 1 year ago

Your welcome

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Technician: Alex Olsen,
 replied 1 year ago

please remember to rate my service when you get a chance, i will continue to assist you after rating so rate with confidence, Thanks

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Alex Olsen
Alex Olsen
Alex Olsen
Category: Medium and Heavy Trucks
Satisfied Customers: 190
190 Satisfied Customers
Experience: Lead technican at Astleford international trucks

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