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Discussion Starter · #1 · (Edited)
This is my first post from Japan.
There have been many great discussions on this forum for a long time, and I am very impressed.

Now for the main topic. I tried to read ROM data from an ECU with a daughter board using NDS (NISSAN DATA SCAN) the other day.
The daughter board is a classic one with two 27512 ROMs.
However, it failed to read the ROM, and sending a command (0xC9) from the serial terminal returned an error code (0xFE).

Perhaps this is a known fact to you, but is it not possible to suck out ROM data using the Consult System?

I tried to send the command about 250 ways, but only 0x54 showed a different behavior.
Example (reading address 0x8000):
Send: XX 0x80 0x00 0xF0 (XX is 0x01 to 0xFF)
Receive: 0xEF 0xEF 0xEF 0xEF

Send:0x54 0x80 0x00 0xF0
Receive: 0xAB 0x80 0x00

Has anyone else had the same experience, or is anyone familiar with ROM Tune from this era?
 
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