Case IH F-5246-00 - ECU – Engine Control Module (ECM) / Engine ECU: Aftertreatment SCR Operator Inducement Severity - Most Severe Level

The Selective Catalytic Reduction (SCR) system has entered a Level 3 inducement (creep mode), which typically limits the vehicle speed to 5 mph and severely derates engine power. This is triggered by a tampering fault or a severe, unresolved SCR system malfunction.

• MAGNUM AFS Connect
• Magnum 180
• Magnum 200
• Magnum 225
• Magnum 235
• Magnum 260
• Magnum 290
• Magnum 315
• Magnum 340
• Magnum 370
• Steiger Quadtrac 350
• Steiger Quadtrac 400
• Steiger Quadtrac 450
• Steiger Quadtrac 500
• Steiger Quadtrac 550
• Steiger Quadtrac 600
• Puma
• Maxxum
• Farmall
• Axial-Flow 5130
• Axial-Flow 6130
• Axial-Flow 7130
• Axial-Flow 7230
• Axial-Flow 8230
• Axial-Flow 9230
• Patriot 4430

1. 1

   Read all active codes for accompanying faults related to DEF quality, DEF level, or NOx sensors (e.g., SPN 3364, 1761, 3521, 3528, 3529, 3530).

2. 2

   Inspect DEF fluid in the tank for degraded, contaminated, or diluted fluid.

3. 3

   Inspect the DEF pump and tank module for poor pressure or leaks, specifically checking for a cracked DEF suction tube near the top of the tank unit.

4. 4

   Check wiring harnesses and connectors for the DEF quality sensor, NOx sensors, and DEF pump for rodent damage, short circuits, or disconnected plugs.

5. 5

   Inspect the DEF pre-filter for blockages or contaminants at the DEF pump inlet tube fitting.

1. 1

   Resolve the Root Cause

   Repair or replace the failed component identified in your diagnostic checks (e.g., replace a faulty NOx sensor, swap a cracked DEF tank suction unit, or replace a failed DEF dosing pump).

2. 2

   Address DEF Fluid

   If fluid contamination is suspected, drain the DEF tank completely and refill it with fresh, certified Diesel Exhaust Fluid.

3. 3

   Replace Filters

   If replacing the DEF pump, also replace the DEF pre-filter to ensure no contaminants enter the new pump.

4. 4

   Perform a Forced Regeneration

   Use a diagnostic service tool (like Case IH Electronic Service Tool) to perform a forced regen. This resets the DPF and SCR status.

5. 5

   Reset the Inducement Lock

   Clear all active and inactive fault codes. If the system has been in Level 3 inducement, the override counter may be locked. You must use the diagnostic tool's UDS service function to reset the inducement lock and restore the override option.

6. 6

   Verify Repair

   Cycle the key and confirm the engine exits the 5 mph creep mode / inducement mode.