OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

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chizel007
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cars: VAUXHALL CAVALIER 4X4 TURBO

OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by chizel007 »

Hi guys and girls i have got a opel vectra a 2000 gsi digital dash cluster that i need the mileage correcting on. I am sure the mileage is stored in an 8 pin soic but the id is KF9658KI has anybody any ideas what this chip is?

The cluster was manufactured by Delco electronics in the UK around 1989 and was ftted to a handfull of UK spec vauxhall cavalier gsi 2000 in 1989 and 1990 but then removed from the UK market only to be sold in the german market on opel vectra a gsi 2000 up until around 1992 i suspect. Rumour has it is was an optional extra and they only made 500 of them but i doubt that i just think its the usual theme of the german market seems to get all the good stuff just like you cant get right hand drive lancia delta integrales or alfa romeo 156 q4s

Currently i have desoldered the chip from the board and ive got it in a soic clip reading with ponyprog via a 93cxx 24cxx 25xxxx programmer but the read looks nothing like the reads on the thread " couldnt really find a sectio for this".
Attachments
a close up of the soic in question
a close up of the soic in question
20130417_211735.jpg (3.74 MiB) Viewed 7735 times
the rear of the cluster
the rear of the cluster
20130417_211707.jpg (3.7 MiB) Viewed 7735 times
vectra a lcd dash installed
vectra a lcd dash installed
Photo0108.jpg (1.69 MiB) Viewed 7735 times
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festy
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by festy »

Very retro-cool looking dash, it kind of looks like the lovechild of an Alfa 90 and the starship enterprise :mrgreen:
Do you have a photo of the other side of the board? I'm guessing the mcu will be on the back, possibly something like a PLCC packaged HC11 sort of thing, right in the middle of the PCB?
The only ICs I can see on this side are inverters and multiplexers (plus the unknown SOIC-8), so I think the interesting bits might be on the back.
It looks like apart from the MCU there's at least 2 DIP packaged ICs on the back, but taking a wild stab at it I'd guess towards the top middle of the board there might be an 8 pin SPI eeprom, like a 93LC46 in 8 bit addressing mode? I know it won't be a 24cXX at least...

But I guess you've already looked on the back at some point, so what has made you think that this SOIC-8 holds the data? I can't make out the traces around it, but the 6 high wattage resistors/diodes/whatever directly over it on the back and it's general position on the board would make me think it's probably not?
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Jayme
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by Jayme »

I wouldnt expect the data from that dash to look anything like out commodore dashes anyway, our dashes are made by a company called "aarow australia", rather than delco.
chizel007
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by chizel007 »

Hello again guys just thought i would add some more pics of this dash cluster. I thought the small 8 pin soic would be the chip that stores the mileage basically because mo matter what car has a digital odometer its nearly always stored n the 8 pin chip plus this chip was blank on the top and covered in some type of plastic glue as if to say its in here but were not going to let you get to it that easily. naive of me to make this assumption but ive got to start some where. the reverse of the chip says KF9658Ki if anybody has an idea of its pin out or a data sheet.

Please note the removable chip IC7 does not store the mileage the cluster will still display the mileage even with that removed or replaced with one from another cluster, cheers
Attachments
the reverse of the cluster assembled
the reverse of the cluster assembled
Photo0110.jpg (2.07 MiB) Viewed 7694 times
The reverse of the PCB
The reverse of the PCB
20130417_211813.jpg (3.39 MiB) Viewed 7694 times
chizel007
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by chizel007 »

Just to give everybody as much information as possible to date right or wrong i have desoldered said chip and had a read of it using pony prog on different settings, thought i would let you guys have a look to see if you can make any sense of the data.
Im hoping its either correct and somebody can understand or even if its wrong but helps identify the chip so we can rule it out as the odometer store.
Anyway any help what so ever greatly appreciated.
Attachments
TEST2 CAV.bin
(2.06 KiB) Downloaded 380 times
TEST1 cav.bin
(512 Bytes) Downloaded 345 times
chizel007
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by chizel007 »

screen shots
Attachments
testcav2 screen shot.JPG
testcav2 screen shot.JPG (221.89 KiB) Viewed 7691 times
test cav1 screen shot.JPG
test cav1 screen shot.JPG (132.63 KiB) Viewed 7691 times
chizel007
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by chizel007 »

Every little helps, more pics
Attachments
close up of IC8 on front of PCB
close up of IC8 on front of PCB
20130503_233052.jpg (3.84 MiB) Viewed 7688 times
close up of con6/ic7 removed (just in case)
close up of con6/ic7 removed (just in case)
20130503_232956.jpg (4.04 MiB) Viewed 7688 times
IC11  8pin SOIC kf9658ki removed
IC11 8pin SOIC kf9658ki removed
20130503_232716.jpg (3.84 MiB) Viewed 7688 times
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festy
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Re: OPEL VECTRA A LCD DASH MILEAGE CORRECTION, HELP!

Post by festy »

IC1 = 8052 mcu (i was close...)
IC1B = ROM for mcu
IC8 = PIC I think, I'd bet money on the odo reading being stored on that.
Which means your only real way of doing this would be to reverse engineer the 8052-pic comms and write your own pic code to replace it with - either use a logic analyser on the serial lines between the two, or dump the ROM and I can probably tell you what it's expecting...
Probably simple enough if you happen to be familiar with both 8052 and PICs ;)

Oh - you could try dumping the PIC, but I would be fairly sure it would be protected. It will be a masked ROM with some eeprom which is where the odo reading lives I think.
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