Case IH F-522816-12 - CGR – CGR: RTK Radio Failure

Internal hardware failure or a total loss of communication with the RTK (Real-Time Kinematic) radio module attached to the GNSS receiver.

• MAGNUM AFS Connect
• STEIGER AFS Connect
• Case IH AFS Connect Magnum 180
• Case IH AFS Connect Magnum 200
• Case IH AFS Connect Magnum 220
• Case IH AFS Connect Magnum 240
• Case IH AFS Connect Magnum 250
• Case IH AFS Connect Magnum 280
• Case IH AFS Connect Magnum 310
• Case IH AFS Connect Magnum 340
• Case IH AFS Connect Magnum 380

1. 1

   Inspect the CGR Serial Interface Cable connecting the RTK radio module to the main AFS Vector Pro receiver for bent pins, moisture ingress, or corrosion.

2. 2

   Ensure the CGR receiver is receiving adequate voltage (related codes 3509-00 or 3509-04 indicate supply voltage issues that could cause the radio to drop offline).

3. 3

   Check the RTK radio antenna (UHF or 900 MHz) and its coaxial connection to the radio module for physical damage.

4. 4

   Verify the CGR software version via the AFS Pro 1200 display (e.g., software part number 51631366 or 90336819) is up to date (v1.1.0.0 or higher) to prevent firmware mismatches.

5. 5

   Rule out simple loss of RTK subscription or signal blockage (which would throw codes like A-GNSS-107 or A-GNSS-112) to ensure this is a hardware failure.

1. 1

   Power Down

   Turn off the machine, remove the key, and disconnect the battery to prevent voltage spikes during component replacement.

2. 2

   Access the Receiver

   Safely access the cab roof where the AFS Vector Pro (CGR) receiver is mounted.

3. 3

   Disconnect the Radio

   Disconnect the RTK radio antenna and unplug the CGR serial interface cable from the RTK radio module.

4. 4

   Remove the Module

   Unbolt/unclip the faulty RTK radio module from the main CGR receiver housing.

5. 5

   Install the Replacement

   Mount the new RTK radio module (ensure you are installing the correct frequency band for your region/base station, e.g., 450-470 MHz or 900 MHz).

6. 6

   Reconnect

   Plug in the serial interface cable and attach the RTK antenna.

7. 7

   System Configuration

   Reconnect the battery and power on the tractor. Navigate to the AFS Pro 1200 display. Go to Settings -> RTK Radio Setup and configure the new radio (e.g., "900 Mhz AFS VectorPro X-RTK Radio").

8. 8

   Validation

   Verify that the fault code F-522816-12 has moved to an inactive state and clear it. Confirm that the receiver is pulling an RTK correction signal.