New Holland ICU 14015 – ICU: Engine Intake Air Temperature data is _ERROR|| or _NOT AVAILABLE|| state from GOV.

This code indicates a communication or sensor data failure. The Instrument Cluster Unit is expecting to receive the engine's intake air temperature reading over the CAN data bus from the engine governor/controller, but the data being broadcast is either flagged as an error or is completely missing.

• T6 Series
• T7 Series
• T8 Series
• T9 Series
• TS-A Series
• Boomer Series
• CR Series
• CR9090
• CX Series
• CX8080
• CX8090

1. 1

   Locate the Intake Air Temperature (IAT) sensor (often a combined MAP/IAT sensor on the intake manifold). Check the sensor connector for corrosion, backed-out pins, or moisture.

2. 2

   Inspect the wiring harness between the IAT sensor and the Engine Control Module (GOV) for chafing, shorts to ground, or open circuits.

3. 3

   Check for other active CAN bus or GOV offline codes (such as ICU 14018 GOV Off Line). If multiple modules are offline, troubleshoot the CAN bus backbone (Yellow/Green wires) between the engine ECU and the ICU.

4. 4

   Verify that the engine ECU is receiving proper battery voltage and has clean grounds, as low voltage can cause sensor reference voltage drops or CAN broadcast failures.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery ground to prevent electrical spikes during repair.

2. 2

   Test the Sensor

   Disconnect the IAT/MAP sensor pigtail. Using a multimeter, check the sensor's resistance across the temperature pins. If the circuit is open or out of specification for the ambient temperature, the sensor has failed internally.

3. 3

   Replace the Sensor

   Remove the retaining bolt(s) holding the sensor in the intake manifold. Pull the old sensor out, lubricate the O-ring on the new sensor, and press it into place. Torque the retaining bolt to OEM spec and reconnect the harness.

4. 4

   Repair Wiring

   If the sensor tests fine, perform a continuity test from the sensor connector back to the Engine ECU pinout. Repair any broken wires or replace the pigtail connector if the terminals are spread.

5. 5

   Clear Codes

   Reconnect the battery. Turn the key to the ON position and use a diagnostic tool (or onboard diagnostic menu) to clear the ICU 14015 code. Start the engine and verify that the intake air temperature reads correctly on the instrument cluster.