Engine fan short... false code.

[apex944]

Porsche 996 C2 - 1999, M5.2.2 DME
Engine fan removed many years ago during conversion to a Grand-Am Cup race car.
Always ignored this error as there are no shorted wires to that fan. The wires are independently taped up and tucked away.
I figured it would be nice to get rid of this code over the winter.  
How can I resolve this? 

[JFP in PA]

P1673 is thrown because the fan is not there (open circuit), you would need to find the internal resistance of a working fan and install a resistor of that rating and install that instead of the fan.  The relay(s) will also need to be in place as well.  An easier "out" would be to put the fan back in.

[apex944]

thx,  
Fan is long gone.  Would you happen to have any guesses on a range of resistance values that I could test through? 
I can probably come up with something variable to test with and then later swap out with a final resistance value as "the fix".   But I have no idea what range to start with given that I have no fan here to measure. 

 

 

[JFP in PA]

I do not, but perhaps another board member can chime in that has done this.

[JFP in PA]

Just realized something while looking for resistance values: P1673 is the code for an engine cooling fan, not the engine compartment purge fan; are you sure about that P code value?  The code for the purge fan should be P1671........

[apex944]

Code value, yes. 
That's what the Durametric shows, as per the screen shot. 

 

 

 

[JFP in PA]

P1673, according to the factory OBD II diagnostic manual for your car, it a cooling fan fault at the front of the car, not the purge fan, which is P1671.  If you have the Durametric system, you should be able to trigger the front fans to run and both speeds from the Durametric, might be worth checking to make sure they are both working.  I would also consider getting a "second opinion" scan with another system as the Durametric indication may have the code description wrong.