Case IH 3761 – Engine Control Unit (ECU) / Engine Control Module (ECM): ECU internal failure - Torque request exceeds maximum torque limit

The engine control unit has detected an internal calculation error or software anomaly where the requested engine torque is higher than the maximum allowable limit programmed into the module.

• Steiger T4B
• 240 Series Axial-Flow Combines
• 7240
• 8240
• 9240

1. 1

   Check for related voltage codes (such as 3762 or 3763) which can cause the ECU to calculate torque requests incorrectly

2. 2

   Inspect power and ground connections to the Engine ECU for corrosion or loose connections causing intermittent voltage issues

3. 3

   Check for active service bulletins or software updates for the Universal Control Module (UCM1/UCM2)

4. 4

   Clear the fault code and perform a test run to determine if the code is a hard fault or an intermittent software glitch

1. 1

   Connect diagnostic tool

   Connect a compatible diagnostic tool (such as the Case IH AFS Pro 700 display or Jaltest diagnostic tool) to the machine's diagnostic port.

2. 2

   Read fault codes

   Read and record all active and stored fault codes to confirm DTC EADD (3761) is the primary issue.

3. 3

   Inspect wiring harness

   Inspect the wiring harness connectors at the Engine ECU for corrosion, bent pins, or moisture intrusion. Clean and secure if necessary.

4. 4

   Update software

   If the wiring is intact and the code remains active, attempt to re-flash or update the Engine ECU software to the latest version (e.g., updating UCM1/UCM2 to software versions like 35.18.0.0 or 33.45.0.0, depending on your machine's specific PIN and emissions tier).

5. 5

   Replace Engine ECU

   If the software update does not resolve the issue, the Engine ECU has suffered a hard internal hardware failure and must be replaced.

6. 6

   Disconnect battery

   Disconnect the machine's battery.

7. 7

   Install replacement module

   Remove the faulty Engine ECU and install the replacement module.

8. 8

   Program and calibrate

   Reconnect the battery and use the diagnostic tool to program the new module to the machine and calibrate it to the engine.