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 Toyota denso 93c56 programming with t48		  New Topic  Reply to Topic
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Bamse82

13 Posts
Posted - 03/21/2026 :  07:07:44  Show Profile  Reply with Quote
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?
Reply #1

anniel

2622 Posts
Posted - 03/21/2026 :  13:27:34  Show Profile  Reply with Quote
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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Reply #2

Bamse82

13 Posts
Posted - 03/21/2026 :  21:58:20  Show Profile  Reply with Quote
Ra57/93c56 on the eeprom. The ecu is a 27036-1152 [PCB]
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Reply #3

anniel

2622 Posts
Posted - 03/22/2026 :  08:00:18  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82

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

Chip is probably damaged.
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Reply #4

Bamse82

13 Posts
Posted - 03/23/2026 :  02:27:55  Show Profile  Reply with Quote
But I could read it 7 times with no problems? Could also program it with ori data
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Reply #5

anniel

2622 Posts
Posted - 03/23/2026 :  07:25:44  Show Profile  Reply with Quote
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?
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Reply #6

Bamse82

13 Posts
Posted - 04/07/2026 :  12:54:03  Show Profile  Reply with Quote
Nope. Can't program any 93c56... even ordered blank eeproms but No sir
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Reply #7

anniel

2622 Posts
Posted - 04/08/2026 :  10:11:34  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82

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


Bad programmer?
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Reply #8

Bamse82

13 Posts
Posted - 04/08/2026 :  13:15:52  Show Profile  Reply with Quote
Maybe... I use a t48 programmer. But do you think a gq-4x4 will do the job?
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Reply #9

anniel

2622 Posts
Posted - 04/09/2026 :  05:55:06  Show Profile  Reply with Quote
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.
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Reply #10

Bamse82

13 Posts
Posted - 04/09/2026 :  09:22:02  Show Profile  Reply with Quote
Ordered a gq4x4. I will report after test
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Reply #11

anniel

2622 Posts
Posted - 04/10/2026 :  05:29:27  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82

Ordered a gq4x4. I will report after test


Yes, please do so.
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Reply #12

Bamse82

13 Posts
Posted - 04/12/2026 :  11:15:58  Show Profile  Reply with Quote
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
Edited by - Bamse82 on 04/12/2026 13:56:38
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Reply #13

anniel

2622 Posts
Posted - 04/14/2026 :  07:48:18  Show Profile  Reply with Quote
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.
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Reply #14

Bamse82

13 Posts
Posted - 04/14/2026 :  10:40:34  Show Profile  Reply with Quote









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Reply #15

anniel

2622 Posts
Posted - 04/15/2026 :  08:19:32  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82













Did you do a blank check?
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Reply #16

Bamse82

13 Posts
Posted - 04/15/2026 :  10:53:02  Show Profile  Reply with Quote
Yes I did a blank check.
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Reply #17

anniel

2622 Posts
Posted - 04/16/2026 :  13:29:32  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82

Yes I did a blank check.

Are you able to erase the chips?
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Reply #18

Bamse82

13 Posts
Posted - 04/16/2026 :  20:47:10  Show Profile  Reply with Quote
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.
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Reply #19

anniel

2622 Posts
Posted - 04/17/2026 :  15:12:41  Show Profile  Reply with Quote
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?
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Reply #20

Bamse82

13 Posts
Posted - 04/17/2026 :  23:31:35  Show Profile  Reply with Quote
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Reply #21

anniel

2622 Posts
Posted - 04/18/2026 :  05:11:56  Show Profile  Reply with Quote
quote:
Originally posted by Bamse82



Ok. Looks good.
Are you certain your chips are not mask ROM?
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Reply #22

Bamse82

13 Posts
Posted - 04/18/2026 :  14:25:43  Show Profile  Reply with Quote
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
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Reply #23

anniel

2622 Posts
Posted - 04/19/2026 :  06:29:08  Show Profile  Reply with Quote
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.
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Reply #24

Bamse82

13 Posts
Posted - 04/19/2026 :  13:22:21  Show Profile  Reply with Quote
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!
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Reply #25

anniel

2622 Posts
Posted - 04/20/2026 :  03:59:43  Show Profile  Reply with Quote
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.
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