Case IH 1088 – ATC (Armrest Controller) or EDC (Electronic Draft Control) / Hitch Controller: 8 volt reference is below 7.2 volts

The tractor's computer is monitoring an 8-volt reference circuit that is typically used to power Electronic Draft Control (EDC) hitch load pins (draft pins). Because this specific tractor model does not come equipped with hitch load pins, the circuit is open/unpopulated, causing the voltage to read below the 7.2V threshold. The system throws this code because it is incorrectly configured to look for hardware that does not exist on the machine.

• Magnum
• Steiger T4B
• Magnum 235 – 340 (Series 4)
• Steiger Series

1. 1

   Physically inspect the rear hitch of the tractor to confirm that it does not have hitch load pins (draft pins) installed.

2. 2

   Access the tractor's display monitor (Pro 700 or equivalent) and navigate to the hitch system configuration page.

3. 3

   If the tractor is supposed to have draft pins, check the 8V reference circuit with a multimeter.

1. 1

   Turn the ignition key to the ON position (engine off).

   Turn the ignition key to the ON position (engine off).

2. 2

   Access the tractor's configuration/service menu through the cab display monitor.

   Access the tractor's configuration/service menu through the cab display monitor.

3. 3

   Navigate to the Hitch System Configuration or EDC (Electronic Draft Control) setup menu.

   Navigate to the Hitch System Configuration or EDC (Electronic Draft Control) setup menu.

4. 4

   Locate the setting for Hitch Load Pins or Draft Pins.

   Locate the setting for Hitch Load Pins or Draft Pins.

5. 5

   Change this configuration to "Not Installed" or set the hitch to "Position Control Only".

   The system is likely currently set to "Installed" or configured for 1 or 2 draft pins. Change this configuration to "Not Installed" or set the hitch to "Position Control Only" (disabling draft control monitoring).

6. 6

   Save the configuration settings.

   Save the configuration settings.

7. 7

   Turn the ignition key OFF, wait 30 seconds, then turn the key back ON.

   Turn the ignition key OFF, wait 30 seconds for the controllers to power down and save memory, then turn the key back ON.

8. 8

   Check the active fault codes to verify that code 1088 has been cleared.

   Check the active fault codes to verify that code 1088 has been cleared and is no longer active.