Case IH 2690 (519285.11) - DEC – MMP: Error load disable from MMP

The system has detected an anomaly that forced a specific control module (abbreviated as "MMP") to disable an electrical or hydraulic load to prevent damage.

• MAXXUM T4E
• VESTRUM CVX
• Magnum
• Steiger
• Puma
• Optum
• Axial-Flow

1. 1

   Check system voltage to ensure the battery voltage is stable (above 12.1V resting, ~14V running). Low voltage can cause modules to disable heavy loads.

2. 2

   Scan for accompanying codes using the Case IH EST to look for secondary voltage, short-to-ground, or communication (U-code) faults.

3. 3

   Inspect main chassis harnesses for chafing, particularly around pivot points or areas exposed to heat.

4. 4

   Perform a hard battery reset by disconnecting the battery for 15 minutes to clear latched logic errors in the modules.

1. 1

   Connect diagnostic tool

   Connect the tractor to the Case IH EST (Electronic Service Tool) laptop.

2. 2

   Run load-test routine

   Use the EST software to run a load-test routine on the MMP module to identify which specific circuit (e.g., a PTO solenoid, lighting circuit, or hydraulic valve) was disabled.

3. 3

   Trace wiring

   Trace the specific wire of the identified disabled circuit to locate and repair the fault.