Clarion RT-9420G (Mazda) - some help needed

[ivan6666]

Hi everyone!

I've got on my Mazda (323f 2001) a Clarion RT-9420G unit.

As usual , after changing the battery I've missed three times the right code and put it in ERR state.

OK, that's it! I've used ICprog with a serial JDM programmer. I have build a Microwire adapter that fits (and works) into the PIC 12CXXX socket.
I've dumped the 93c46, found the code but, still do not know what address and how I should modify it to reset the unit from the ERR state.

Because there is little information about this model I'm asking you for a little bit of help.

The dump looks like this:

0000: AAAA 4276 0003 FDF3 FFFF FF7F 1010 FFFF
0008: 0920 FFFF 1004 FFFF FFFF FFFF FFFF FFBB
0010: FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
0018: FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
0020: FFFF FFFF FFFF FFFF FFFF FFFF FFFF 3FFF
0028: FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
0030: FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
0038: FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF

and the code should be 7642. What should I modify to reset the ERR state?

Thanks,
Ivan G

[ivan6666]

Waiting for an answer I've browsed (again) the Clarion posts looking for a hint.

Thanks to pedeve and InfraGsm I've got the hint. The next byte (06h) after the code is the trial counter. Changed it from 03h to 00h, resoldered the 93C and tested the unit. Voila! ERR is gone, CODE is back...

Entered the code and the unit is back in business...

Many thanks for being here, you folks!