Case IH 516628-31 - PCM – PCM: ECU - internal check procedures

The control module has failed its internal self-diagnostic checks. The underlying condition is typically an internal hardware failure, a memory/processor fault, or an Input/Output circuit failure within the module itself.

• MAGNUM AFS Connect
• Magnum AFS Connect Tractors (Models 250, 280, 310, 340, 380, 400)
• Steiger AFS Connect Tractors
• Optum and Puma AFS Connect Tractors
• Axial-Flow 260 Series Combines
• Patriot 50 Series Sprayers

1. 1

   Power Cycle: Turn the machine off, wait for the modules to fully power down, and turn the key back on to see if the internal check error was a temporary glitch.

2. 2

   Inspect Wiring & Connectors: Check the multi-pin connectors at the PCM. Look for backed-out pins, moisture intrusion, or corrosion, which can cause I/O errors.

3. 3

   Verify Voltage: Test the power and ground circuits feeding the PCM. Low voltage or a poor ground can cause the module's processor to fail its internal self-checks.

4. 4

   Software Check: Connect the Case IH Electronic Service Tool (EST). Check if there is a software update or reflash available for the PCM, as firmware bugs can trigger false hardware codes.

5. 5

   If power, ground, and software are all verified and the code remains active, the PCM has suffered an internal hardware failure and must be replaced.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent electrical spikes during module replacement.

2. 2

   Locate the PCM

   Access the Processing & Connectivity Module (location varies by cab, often found under the instructional seat or behind the rear cab trim).

3. 3

   Disconnect the Module

   Carefully unplug the main wiring harness connectors. Disconnect the coaxial antenna cables (4G/Cellular, GPS/GNSS, and WLAN).

4. 4

   Remove the PCM

   Unbolt the mounting hardware and remove the faulty module.

5. 5

   Install the New PCM

   Mount the replacement PCM and secure it with the bolts.

6. 6

   Reconnect

   Reconnect all antenna cables (ensure they are threaded on securely but not overtightened) and plug in the main wiring harnesses.

7. 7

   Restore Power

   Reconnect the machine's battery.

8. 8

   Programming

   Connect the Case IH EST laptop. The new PCM is blank and must be flashed with the correct machine software. You will also need to provision the modem so it can communicate with the Case IH AFS Connect / FieldOps network.

9. 9

   Clear Codes

   Clear all stored fault codes and cycle the key to verify that 516628-31 does not return.