Hl6528 auto

Hello. Previously we used different HL6528 modems in our devices (except RD and automotive grade).
Now we tried to apply HL6528 Automotive grade (HL6528-G2.8V AUTO 1102316).
These modems don’t work in our devices -there are no signals on the contacts of the SIM card (we used single SIM1). What is the difference between automotive and other modems? Where can I find “AirPrime HL6528x (Automotive) Product Technical Specification Reference Number: 4116503”?
Thanks in advance for the answers.

Hi @kalinin.vldmr ,
Welcome to Sierra community!
I cannot find the document in Sierra source because the module is EOL. To debug the problem, please provide the output of the following commands.
AT+CPIN?
AT+CSQ
AT+CREG=2
AT+CCID
AT+CIMI
AT*PSNTRG?
AT+KBND?
AT+COPS?
AT+COPS=?
AT+CREG?
AT+CGDCONT?
AT+CGACT?
AT+CGATT?

Thanks

AT+CPIN? ERROR
AT+CSQ +CSQ: 30,99 OK
AT+CREG=2 OK
AT+CCID Not responce. Modem hung up
AT+CIMI ERROR
AT*PSNTRG? ERROR
AT+KBND? +KBND: 02 OK
AT+COPS? +COPS: 0 OK
AT+COPS=? Not responce. Modem hung up
AT+CREG? +CREG: 2,0 OK
AT+CGDCONT? ERROR
AT+CGACT? ERROR
AT+CGATT? ERROR

I add AT+CMEE=2 comand before test
result:
AT+CPIN? +CME ERROR: SIM not inserted
AT+CSQ +CSQ 21,99
AT+CREG=2 OK
AT+CIMI +CME ERROR: SIM not inserted
AT*PSNTRG? +CME ERROR: SIM not inserted
AT+KBND? +KBND: 04 OK
AT+COPS? +COPS: 0 OK
AT+COPS=? Not responce. Modem hung up
AT+CREG? +CREG: 2,0 OK
AT+CGDCONT? +CME ERROR: SIM not inserted
AT+CGACT? +CME ERROR: SIM not inserted
AT+CGATT? +CME ERROR: SIM not inserted

But sim insert in SIM1. This sim work with hl6528 without automotive grade in marking.
The problematic modem does not send any signals to the SIM card (tested by oscilloscope).

Hi @kalinin.vldmr ,
Which board are you using for the module? How many SIM card slot are supported on the board?
Have you tried to query default SIM card by command : AT+KSDS?

Thanks

+KSDS: 1 OK.
I use self-developed PCB.

The problem seems to be solved.
After AT comand AT+KGPIOCFG=3,1,1 and reebot modems works with SIM1.
It cmd pulled up GPIO3 pin (UIM1_DET).
In technical spec printed: UIM1_DET: UIM detection (optional). In my pcb it pin left open - in fact it work with hl5528(not AUTO) and dont work with HL6528 AUTO.