Case IH 17895 (F-974-31) - ECU – Engine Control Unit (ECU): ECU internal failure - Remote accelerator pedal position error

The Engine Control Unit (ECU) is detecting a plausibility error, calibration error, or an internal processing failure regarding the signal coming from the remote accelerator pedal position sensor.

• VESTRUM CVX
• Austoft 9900
• 9000 series

1. 1

   Check the battery voltage and alternator output, as voltage drops during a cold start can trigger this error

2. 2

   Inspect the wiring harness between the remote accelerator pedal position sensor and the Engine ECU for high resistance, open circuits, or short circuits

3. 3

   Check if the ECU is being subjected to abnormally high temperatures, which can cause internal processing faults

4. 4

   Inspect the physical mounting of the accelerator pedal and its sensor to ensure it is not obstructed, loose, or damaged

1. 1

   Voltage Verification

   Load-test the batteries and verify the alternator is charging at the correct voltage. Resolve any power supply issues first.

2. 2

   Harness Testing

   Disconnect the accelerator pedal position sensor and the corresponding connector at the Engine ECU. Use a digital multimeter to perform a continuity and resistance check on the signal, reference voltage, and ground wires.

3. 3

   Clean Connections

   Clean the connector pins at both the pedal sensor and the ECU with electrical contact cleaner to eliminate high resistance caused by dirt or corrosion.

4. 4

   Sensor Replacement

   If the wiring is completely intact and within specification, the remote accelerator pedal position sensor (or the integrated pedal assembly) is likely faulty and should be replaced.

5. 5

   ECU Evaluation

   Clear the fault codes using a diagnostic tool. If code 17895 (F-974-31) immediately returns after replacing the sensor and verifying the wiring, the Engine ECU has suffered a genuine internal failure and must be replaced or reprogrammed by a Case IH dealer.