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2007 PT cooling fan problem

 
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Old 19 Jul 2018, 11:10 pm
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Default 2007 PT cooling fan problem

The radiator fan on my 07 PT Cruiser won't turn on. I have a new fan,tipm, connections good. Fan powers up when power is applied. Dose the coolant temp. Sensor signal the ecm when fan needs to run? Or is it an emmisions sensor?
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Old 20 Jul 2018, 01:08 am
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Default Re: 2007 PT cooling fan problem

Does the engine light come on? If so what codes are being triggered?

Usually you would get a code for the coolant temperature sensor if it was not working properly.

With the engine cold, have you tried starting the engine, turning on the A/C to see if the radiator fan automatically comes on almost immediately?

Did the new radiator fan come with new radiator fan relays?

Did you check the group of ground wires going to the drivers side inner fender?

Ground Wires.jpg
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Old 20 Jul 2018, 02:43 am
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Default Re: 2007 PT cooling fan problem

The coolant temp sensor sends a signal to the engine computer. The computer tells the TIPM when to turn on the relay coils. There is a fuse under the TIPM cover [#15 fuse -- 50 amp.]. It powers the fan relays.
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Old 20 Jul 2018, 01:17 pm
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Default Re: 2007 PT cooling fan problem

Quote:
Originally Posted by pt06 View Post
The coolant temp sensor sends a signal to the engine computer. The computer tells the TIPM when to turn on the relay coils. There is a fuse under the TIPM cover [#15 fuse -- 50 amp.]. It powers the fan relays.
P0481 - High Speed Fan Relay Control Circuit:

Possible Causes:

Fused (B+) Circuits
Ground Circuit
High Speed Rad Fan Control Circuit Shorted To Battery Voltage
High Speed Rad Fan Control Circuit Open
High Speed Rad Fan Control Circuit Shorted To Ground
Radiator Cooling Fan Module
Totally Integrated Power Module

If the fuse is blown make sure you find out what caused it to blow.
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