To get unit VIN info, use command unit/get_vin_info:

svc=unit/get_vin_info&params={"vin":<text>}

If success:

{
    {
	"vin_lookup_result":{
	    "pflds":[		/* profile fields */
		{"n":<text>,	/* field name */
		"v":<text>},	/* field value */
		...
	    ]
	}
    }
}

If fail:

{
    "vin_lookup_result":{
	"error":<bool>,		/* true if error */
	"message":<text>,	/* error message */
	"reasons":[		/* error reasons */
	    <text>,
	    ...
	]
    }
}