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 Toyota denso 93c56 programming with t48

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T O P I C    R E V I E W
Bamse82 Posted - 03/21/2026 : 07:07:44
Hi guys! Managed to desolder the 93c56 on a broken toyota denso ecu.
I just wan't to practice on this one for a immo off...
I read the eproom, did immo off in toyolex.
But every time I try to program it in XProg it says: "Verifying FLASH... ERROR! FLASH ADRESS 0X000018  Buf_Val: 0x2112  IC_ Val 0x0000 Programming Failed......
Have tried other files I found on the forums with the same eeprom. Same error.

I can reprogram the ori file with no errors...
What am I doing wrong???
This Toyota Yaris is about to buuuurnnn.

EDIT! Unblocked the optinion "Verify after" and it was sucessed. But when I read the eproom once again the ori file is still in there.
Is this a joke?
25   L A T E S T    R E P L I E S    (Newest First)
anniel Posted - 04/20/2026 : 03:59:43
quote:
Originally posted by Bamse82

SOLVED!!! Got a tip from a member on digital-kaos. I disconnected pin 6 and 7 from the adapter. Don't know why I needed it. Because other folks had done it 100% earlier. Well now we going to test the immo off. Thanks for your patience anniel!


Good find.
Bamse82 Posted - 04/19/2026 : 13:22:21
SOLVED!!! Got a tip from a member on digital-kaos. I disconnected pin 6 and 7 from the adapter. Don't know why I needed it. Because other folks had done it 100% earlier. Well now we going to test the immo off. Thanks for your patience anniel!
anniel Posted - 04/19/2026 : 06:29:08
quote:
Originally posted by Bamse82

What do you mean by that? Have tester with the ori rh56 also. Talked to one guy who did emmo off with a identical eeprom with gq4x = sucess


A mask ROM cannot be electronically changed after manufacture. Try a real 93c56 from a reputable source.
Bamse82 Posted - 04/18/2026 : 14:25:43
What do you mean by that? Have tester with the ori rh56 also. Talked to one guy who did emmo off with a identical eeprom with gq4x = sucess
anniel Posted - 04/18/2026 : 05:11:56
quote:
Originally posted by Bamse82




Ok. Looks good.
Are you certain your chips are not mask ROM?
Bamse82 Posted - 04/17/2026 : 23:31:35
anniel Posted - 04/17/2026 : 15:12:41
quote:
Originally posted by Bamse82

quote:
Originally posted by anniel

quote:
Originally posted by Bamse82

Yes I did a blank check.


Are you able to erase the chips?


No i'm not. After erase the same data still appears. I thought if the t48 adapters has different pinouts? Because i'm out of ideas now. Seems that other users have sucessfully read/write those eeproms with both programmers.


Is your adapter a straight through?
Bamse82 Posted - 04/16/2026 : 20:47:10
quote:
Originally posted by anniel

quote:
Originally posted by Bamse82

Yes I did a blank check.


Are you able to erase the chips?


No i'm not. After erase the same data still appears. I thought if the t48 adapters has different pinouts? Because i'm out of ideas now. Seems that other users have sucessfully read/write those eeproms with both programmers.
anniel Posted - 04/16/2026 : 13:29:32
quote:
Originally posted by Bamse82

Yes I did a blank check.


Are you able to erase the chips?
Bamse82 Posted - 04/15/2026 : 10:53:02
Yes I did a blank check.
anniel Posted - 04/15/2026 : 08:19:32
quote:
Originally posted by Bamse82














Did you do a blank check?
Bamse82 Posted - 04/14/2026 : 10:40:34









anniel Posted - 04/14/2026 : 07:48:18
quote:
Originally posted by Bamse82

Tested with the GQ-4x4 now. Get verify fail on this one too. What am I doing wrong???
Have tested two blank eeproms and two from ecus. Have also tried many different 93c56 versions in the device menu. Tested with different speeds.
And also tested with a solder adapter, clip adapter and a adapter thst reminds of adp-004 which was included from the t48.
Please give me some hope. 3 months on this stupid toyota now and can't get anything to work


Please post a picture of your setup.
Bamse82 Posted - 04/12/2026 : 11:15:58
Tested with the GQ-4x4 now. Get verify fail on this one too. What am I doing wrong???
Have tested two blank eeproms and two from ecus. Have also tried many different 93c56 versions in the device menu. Tested with different speeds.
And also tested with a solder adapter, clip adapter and a adapter thst reminds of adp-004 which was included from the t48.
Please give me some hope. 3 months on this stupid toyota now and can't get anything to work
anniel Posted - 04/10/2026 : 05:29:27
quote:
Originally posted by Bamse82

Ordered a gq4x4. I will report after test



Yes, please do so.
Bamse82 Posted - 04/09/2026 : 09:22:02
Ordered a gq4x4. I will report after test
anniel Posted - 04/09/2026 : 05:55:06
quote:
Originally posted by Bamse82

Maybe... I use a t48 programmer. But do you think a gq-4x4 will do the job?


93C56 is compatible with the GQ-4X4 in 8 and 16 bit.
Bamse82 Posted - 04/08/2026 : 13:15:52
Maybe... I use a t48 programmer. But do you think a gq-4x4 will do the job?
anniel Posted - 04/08/2026 : 10:11:34
quote:
Originally posted by Bamse82

Nope. Can't program any 93c56... even ordered blank eeproms but No sir



Bad programmer?
Bamse82 Posted - 04/07/2026 : 12:54:03
Nope. Can't program any 93c56... even ordered blank eeproms but No sir
anniel Posted - 03/23/2026 : 07:25:44
quote:
Originally posted by Bamse82

But I could read it 7 times with no problems? Could also program it with ori data



Can you successfully program other 93C56 chips?
Bamse82 Posted - 03/23/2026 : 02:27:55
But I could read it 7 times with no problems? Could also program it with ori data
anniel Posted - 03/22/2026 : 08:00:18
quote:
Originally posted by Bamse82

Ra57/93c56 on the eeprom. The ecu is a 27036-1152 [PCB]


Chip is probably damaged.
Bamse82 Posted - 03/21/2026 : 21:58:20
Ra57/93c56 on the eeprom. The ecu is a 27036-1152 [PCB]
anniel Posted - 03/21/2026 : 13:27:34
quote:
Originally posted by Bamse82

Hi guys! Managed to desolder the 93c56 on a broken toyota denso ecu.
I just wan't to practice on this one for a immo off...
I read the eproom, did immo off in toyolex.
But every time I try to program it in XProg it says: "Verifying FLASH... ERROR! FLASH ADRESS 0X000018  Buf_Val: 0x2112  IC_ Val 0x0000 Programming Failed......
Have tried other files I found on the forums with the same eeprom. Same error.

I can reprogram the ori file with no errors...
What am I doing wrong???
This Toyota Yaris is about to buuuurnnn.

EDIT! Unblocked the optinion "Verify after" and it was sucessed. But when I read the eproom once again the ori file is still in there.
Is this a joke?



What is the complete part number?

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