Case IH 3010 – Engine Controller (Engine ECU): Intake Manifold Boost Temperature Sensor Circuit - Signal Above Range Max

The voltage signal returning from the intake manifold boost temperature sensor is higher than the maximum allowable threshold. This typically points to an open circuit, a defective sensor, or a short circuit to an external power source.

• Farmall
• skid steer
• Magnum 235-340 (Series 4)
• Steiger series
• Maxxum
• MXM
• MXU
• Farmall series
• Skid Steer Loaders (SSL)
• Compact Track Loaders (CTL)

1. 1

   Check the wiring harness leading to the intake manifold boost temperature sensor for breaks, chafing, or an open circuit, and inspect the connector for corrosion or loose pins.

2. 2

   Test the circuit to ensure it is not shorted to an external power source or shorted to ground.

3. 3

   Test the sensor's resistance to determine if it is internally defective.

4. 4

   If the wiring is intact and the sensor tests good, verify the Engine Controller, though replacing it is considered a last resort.

1. 1

   Power Down

   Turn off the engine, remove the key, and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the Sensor

   Locate the intake manifold boost temperature sensor on the engine's intake manifold or turbocharger outlet piping. (Note: On some larger tractors like the MX Magnum, you may need to remove the left/right fan shields or loosen the turbocharger elbow clamp to gain clear access).

3. 3

   Disconnect

   Unplug the electrical connector from the sensor.

4. 4

   Remove Sensor

   Unthread and remove the defective sensor from the intake manifold.

5. 5

   Install New Sensor

   Thread the new OEM replacement sensor into the manifold and tighten to the manufacturer's torque specification.

6. 6

   Reconnect

   Reconnect the electrical plug to the sensor, ensuring the locking tab clicks into place.

7. 7

   Clear Codes

   Reconnect the battery, turn the key on, and use a diagnostic service tool to clear the inactive 3010 fault code from the Engine ECU. Start the engine to verify the code does not return.