New Holland NH 3010 – Engine Controller / Engine ECU: Air (boost) Temperature Signal - SOURCE HIGH

The control module is receiving a voltage signal from the intake manifold boost temperature sensor that exceeds the maximum allowable threshold (typically near or above 4.5V to 5.0V), indicating an open circuit or a short to a high-voltage source.

• T5 Series
• T6 Series
• T7 Series
• T8 Series
• CR Series
• CR9040
• CR9060
• CR9070
• 200 Series
• L213
• L218
• L220
• L223
• L225
• L230
• C227
• C232
• C238
• E-Series
• crawler excavators

1. 1

   Visually inspect the boost temperature sensor (T-MAP) connector for disconnected wires, pushed-back pins, moisture, or corrosion.

2. 2

   Perform a continuity and open circuit check on the signal and ground wires between the sensor harness and the ECU.

3. 3

   Perform a short to power check on the signal wire with the key ON (engine off) to ensure it is not shorted to a 5V or 12V source.

4. 4

   Test the sensor resistance; if the wiring harness tests perfectly, the sensor itself has likely failed internally (open circuit).

1. 1

   Turn the machine's key to the OFF position and disconnect the battery ground if you will be repairing the wiring harness.

   Turn the machine's key to the OFF position and disconnect the battery ground if you will be repairing the wiring harness.

2. 2

   Locate the intake manifold boost temperature sensor on the engine.

   Locate the intake manifold boost temperature sensor on the engine.

3. 3

   Depress the locking tab and disconnect the wiring harness connector from the sensor.

   Depress the locking tab and disconnect the wiring harness connector from the sensor.

4. 4

   If wiring damage was found during diagnostics: Splice and repair the broken wire or replace the damaged connector pigtail using an approved OEM connector repair kit.

   If wiring damage was found during diagnostics: Splice and repair the broken wire or replace the damaged connector pigtail using an approved OEM connector repair kit.

5. 5

   If the sensor is faulty: Remove the retaining bolt(s) securing the sensor to the intake manifold.

   If the sensor is faulty: Remove the retaining bolt(s) securing the sensor to the intake manifold.

6. 6

   Pull the old sensor straight out. Clean the mating surface on the manifold, ensuring no dirt falls into the intake.

   Pull the old sensor straight out. Clean the mating surface on the manifold, ensuring no dirt falls into the intake.

7. 7

   Lubricate the O-ring on the new sensor with a small amount of clean engine oil.

   Lubricate the O-ring on the new sensor with a small amount of clean engine oil.

8. 8

   Insert the new sensor into the manifold and tighten the retaining bolt to OEM torque specifications.

   Insert the new sensor into the manifold and tighten the retaining bolt to OEM torque specifications.

9. 9

   Reconnect the wiring harness connector until it clicks securely into place.

   Reconnect the wiring harness connector until it clicks securely into place.

10. 10

    Reconnect the battery, turn the key ON, and use a diagnostic scan tool to clear the NH 3010 fault code. Run the engine to verify the code does not return.

    Reconnect the battery, turn the key ON, and use a diagnostic scan tool to clear the NH 3010 fault code. Run the engine to verify the code does not return.