Error code 1491

My '01 Chrysler T/C van is showing this error code. This refers to the ‘Rad Fan Control Relay Circuit.’ The car never overheats and the temp gage shows the same temp it always has. I have swaped out this relays with others in the fuse box and all relays appear to work. So,??? I can’t get the car inspected in NY when it shows an error code. Any advice (that works!) would be appreciated. Thanks