chipping p72 for uberdata
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From: lakehood, wa
chipping p72 for uberdata
ok according to most ppl you can chip a p72 but the only difference is that you don't need a resistor in r54. is that the <U>ONLY</U> difference or is there something else. A friend of mine is having someone chip his p72 and i guess this guy is having problems and im just trying to help him out
Honda-Tech Member
Joined: Aug 2003
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From: fresno / merced, ca
Honda OBD1 Chipping Process:
1. Desolder all holes for the components.
2. Solder in a 28 pin socket. (Empty footprint)
3. Solder in the 74HC373. (Empty footprint)
4. Solder a 1.1K ohm resistor into R54 location marked in white lettering (not needed on P72 USDM GSR) (Note: 1K - 10K resistors seem to work ok. This is a simple pull up/pulldown resistor. 1K resistors seem to work well with ROM emulators that have trouble with 10k resistors)
5. Solder in two 0.1uF ceramic disc capacitors into C51 and C52.
6. Solder in J1. This jumper can activated by utilizing an unused resistor lead or extra section of spare wire.
7. Insert the 28 pin DIP PROM in the proper orientation and start the car.
1. Desolder all holes for the components.
2. Solder in a 28 pin socket. (Empty footprint)
3. Solder in the 74HC373. (Empty footprint)
4. Solder a 1.1K ohm resistor into R54 location marked in white lettering (not needed on P72 USDM GSR) (Note: 1K - 10K resistors seem to work ok. This is a simple pull up/pulldown resistor. 1K resistors seem to work well with ROM emulators that have trouble with 10k resistors)
5. Solder in two 0.1uF ceramic disc capacitors into C51 and C52.
6. Solder in J1. This jumper can activated by utilizing an unused resistor lead or extra section of spare wire.
7. Insert the 28 pin DIP PROM in the proper orientation and start the car.
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From: SD, ca, us
Re: chipping p72 for uberdata (96MidoriHatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96MidoriHatch »</TD></TR><TR><TD CLASS="quote">ok according to most ppl you can chip a p72 but the only difference is that you don't need a resistor in r54. is that the <U>ONLY</U> difference or is there something else. A friend of mine is having someone chip his p72 and i guess this guy is having problems and im just trying to help him out</TD></TR></TABLE>
should never send your ecu to an amature
should never send your ecu to an amature
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