Milage in ECU or gauge cluster?

[Dexter]

TheMAN,
what wiring diagrams are you looking at?

in the case of not having any diagrams at hand...
we know the input signal has to come INTO the gauge cluster. so one of the wires must ... pulse... damn its late why am i thinking about this...anyways...

are there any unused pins in the harnesses? maybe those might hold an answer.

also, what if you just pulsed the **** out of the speedometer wire?

 

[Dexter]

I think the first step is to dump the EEPROM and then try to reverse engineer it... maybe it uses some form of recognizable ASM code?

my point is that how can we even dump the EEPROM from the chip? just being surface mount makes working with it hard enough. :'(

 

[TheMAN]

I know that the PS2 modchip guys use a razor blade to solder wires to the SMT ROM BIOS chip, so maybe we can just use the same trick

 

[Pheonix]

i'm curious of the wiring diagram also.

surely it doesn't use all those wires, well maybe with cruise and such. perhaps there is a link to talk to the ECU, nahh... but why not.

i'll go house on this as far as pulsing goes and even hook it up to my webcam or just do the 15s of video my camera does.

have a nice new, was going to be used with an RGB led but too many projects already, 555 still in crappy radio shack pack.

 

[Dexter]

I know that the PS2 modchip guys use a razor blade to solder wires to the SMT ROM BIOS chip, so maybe we can just use the same trick

Cool, now all we need is a pinout of the chip!

 

[TheMAN]

anyone have tylenol?

 

[Pheonix]

anyone have tylenol?

thanks

no tylenol, but i have a big mallet, works pretty well.

that diagram is so much more complex than the fog light one i had the mazda tech get me.

 

[BrianV]

My uncle bought a Benz S600 from Canada, it has kilometers on it and he wanted mph. He bought a new MPH US guage from a Benz dealer online, cost him a fortune, and he had his local benz dealer install the guage. He had them convert the km to mi. He has documentation of how many miles were on the car, the date of the swap, and that the swap was done at a dealer. The dealer put on the invoice that milage was matched.