Quote:
Originally Posted by JackandJanet
Thanks for updating us mmandley. I DO want to correct one thing you said though. The Gryphon needs 12+ volts during programming, not 18V. 
Hope you get your unit back soon.
- Jack |
Both you and mmandley correct about both 12
and 18 volts being needed. Ford uses an 18V signal on one of the DLC connector pins to initiate programming:
"FEPS: Flash EEPROM Programming Signal. 18 volt DC signal sent by the scan tool to initiate PCM reprogramming."
Since there's only a nominal 12V from the battery, I would assume that Gryphons and the like have a DC-DC converter to up 12V to 18V for that one pin during PCM programming.
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2007 F150 XL, 4.6, Regular Cab, Gryphon Installed 2/2009
"voiding warranties since 1979"
