Case IH F-102-17 - ECU – Engine Control Unit (ECU): ECU Plausibility Check for air pressure at the upstream of intake valve sensor

The engine's turbo boost pressure plausibility check has detected that the actual intake manifold pressure (boost pressure) is lower than the expected set-point value calculated by the engine control system.

• MAGNUM AFS Connect
• Magnum 225
• Magnum 250
• Magnum 310
• Magnum 335
• Magnum 340
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 130
• Maxxum 140
• Puma 115 through 225CVX
• Puma 165
• Steiger 280 to 485
• STX 280
• STX 330
• STX 380
• STX 430
• Axial-Flow 5130
• Axial-Flow 6130
• Axial-Flow 7010
• Axial-Flow 7120
• Axial-Flow 7230
• Axial-Flow 8010
• Axial-Flow 8120
• Axial-Flow 8230
• Axial-Flow 9010
• Axial-Flow 9120
• Axial-Flow 9250

1. 1

   Use a diagnostic scan tool to compare the actual intake manifold pressure values with the ECU's set-point values

2. 2

   Verify the actual intake manifold pressure using a separate mechanical vacuum/boost manometer to confirm if the deviation is real

3. 3

   If the mechanical gauge confirms low boost pressure (genuine pressure loss): Inspect the charge air cooler, turbocharger hoses, and clamps for splits or loose connections

4. 4

   If the mechanical gauge shows normal pressure (electrical/sensor issue): Inspect the Manifold Air Pressure (MAP) sensor for heavy soot or carbon buildup, and check its electrical lines and 4-pin connector for shorts, corrosion, or open circuits

1. 1

   Turn off the machine and disconnect the battery

   Turn off the machine and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the sensor

   Locate the intake air pressure/temperature sensor on the engine inlet manifold.

3. 3

   Disconnect the wiring harness

   Disconnect the 4-pin electrical wiring harness from the sensor.

4. 4

   Remove the faulty sensor

   Remove the faulty sensor from the intake manifold.

5. 5

   Install the new replacement sensor

   Install the new replacement sensor. Ensure the integrated O-ring is properly seated to avoid creating a new boost leak and to keep out contaminants.

6. 6

   Reconnect the electrical harness

   Reconnect the electrical harness.

7. 7

   Reconnect the battery and clear the fault code

   Reconnect the battery, clear the F-102-17 fault code using a diagnostic scan tool, and test drive the machine under load to verify that the expected boost pressure is achieved and the code does not return.