New to the forum,do a lot of work with ecu and immo. Mostly 93xxx , 24xxx,and 95xxx, 35xxx there was no in circuit reading till I grounded c22. Now the units is reading correctly and in some cases the bits get switch. I have notice that some chip package act different 93xxx surface mount read and writes perfect in circuit. Same chip 93xxx threw hole mount will read good but always fails on the write in circuit. If I remove the chip all is good read and writes prefect. Is there a fix to correct in circuit read and write ? Any way to adjust speed or voltage to the target chip?