Case IH 3932 – Engine Control Unit (ECU) / EDC (Electronic Diesel Control): Info: SCR Inducement: Warning Block 5 activated

This is an informational fault code indicating that the engine control system has detected a critical emissions failure within the Selective Catalytic Reduction (SCR) system and has activated an 'inducement' state (Warning Block 5), which is a forced engine derate.

• Magnum
• Steiger
• Puma
• Optum
• Axial-Flow

1. 1

   Connect the CNH Electronic Service Tool (EST) and scan for primary active and stored fault codes related to DEF level, DEF quality, NOx sensors, DEF dosing pressure, or DEF pump failures

2. 2

   Ensure the Diesel Exhaust Fluid (DEF) tank is not empty

3. 3

   Use a DEF refractometer to test the fluid in the tank (must be exactly 32.5% urea)

4. 4

   Inspect the DEF injector (dosing valve), DEF pump, and lines for severe white crystallization, leaks, or physical damage

1. 1

   Diagnose the Root Cause

   Using the primary fault codes found during your diagnostic scan, pinpoint the failed SCR component (e.g., a failed NOx sensor or a clogged DEF filter).

2. 2

   Perform the Physical Repair

   Replace the failed component, or drain and refill the DEF tank if the fluid was contaminated.

3. 3

   Clear Primary Codes

   Reconnect the CNH EST diagnostic tool and clear the primary SCR fault codes.

4. 4

   Perform SCR System Reset

   Use the CNH EST software to run an 'SCR System Test' or an 'Inducement Reset' procedure. This forces the engine to run, dose DEF, and verify that the emissions system is functioning properly.

5. 5

   Verify Repair

   Once the ECU verifies the SCR system is working and NOx levels are within legal limits, the ECU will automatically deactivate Warning Block 5 and clear code 3932, restoring full engine power.