Quote:
Originally Posted by Esel Mann
Steve et al. by all means chime in if I am wrong on the following.....
Hamptonsam, the response time of the uC adaptive functions within the ECU is likely dependent upon what initial conditions are utilized for the various variables. The ECU likely has very conservative #'s for variables (on a dead start) seeing as it is designed to recover from all conditions. That is to say the adaptive functions will eventually converge to the point where it is running as you would say (or consider) normal. How quickly it converges is dependent upon run time and those initial settings of the variables. If you disconnect the battery, you in essence have to start at the worst case.
That fact that you are using a hammer could possibly remove some of those worst case conditions. As such the hammer is loading in variables with values which are other than the dead start values which permit the adaptive functions to reduce the response time to the point where it is operating "normally" much more quickly. Also consider that the firmware for the hammer should be expected to be revised over time. So depending upon the revision level of your ECU firmware, or the revision level of the hammer, the hammer may be using more recent initial conditions for the various parameters.
The CCU workarounds are all fine and nice, however in the end, the most prudent solution is to simply pull the CCU and have it repaired. It's not like we are talking about ponying up for a brand new or reconditioned CCU. Consider for a moment: (A) what value do you place on a Porsche that operates like any other car and requires no fancy hoops to jump through when you go to use it? (B) The 964 is only going up in value, should you ever decide to sell in the future, how do you think the selling price will fare between "needs nothing" or "to use it you need to be aware of these hoops to jump through...."
And before it is asked, no, I do not own or have any vested interest in the various Porsche electronics repair shops!
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Esel Mann...
All valid points and well taken, I'm sure , by most of us.
The battery cut-off switch is just one of many means by which a dead battery may be averted due to a possible fault in the CCU circuit...It was never intended as a means to any permanent solution.
It is also ,IMHO, an excellent theft deterrent, provided it is located properly as I believe mine is.
Once again, just my own opinion...Others may disagree.
Best Regards,
Tony
