New Holland 14015 – ADIC: ADIC 5 Volt Reference Voltage Too Low

The instrument cluster generates its own 5-volt power supply (reference voltage) to power various sensors throughout the machine. This code triggers when the voltage on this reference circuit drops below the 4-volt threshold. This condition is typically caused by a short to ground in the sensor wiring, a shorted sensor pulling the voltage down, or an internal failure of the instrument cluster's power supply.

• T5.95
• T5.100
• T5.105
• T5.110
• T5.115
• T5.120 Electro Command
• T5040
• T5050
• T5060
• T5070

1. 1

   Visually inspect the wiring harnesses connected to the instrument cluster and all associated sensors for any signs of damage, such as chafing, melting, or corrosion

2. 2

   Check for other active fault codes related to specific sensors, which can help pinpoint the location of a short circuit

3. 3

   Isolate the fault by disconnecting sensors one by one from the affected 5-volt reference circuit to see if the fault code clears; if the fault disappears after disconnecting a particular sensor, that sensor or its wiring is likely the cause of the short

1. 1

   Confirm the fault

   Using a suitable diagnostic tool, confirm that fault code 14015 is active.

2. 2

   Identify sensors on the circuit

   Consult a service manual with electrical schematics for the specific tractor model to identify all sensors powered by the ADIC 5-volt rail.

3. 3

   Test the circuit and isolate sensors

   With the ignition on, use a multimeter to measure the voltage on the 5-volt reference wire at one of the sensors connected to the ADIC. If the voltage is below 4 volts, begin disconnecting sensors one at a time. After each sensor is disconnected, re-check the voltage. If the voltage returns to 5 volts after disconnecting a sensor, that sensor is likely shorted internally and requires replacement.

4. 4

   Inspect and repair wiring harness

   If disconnecting all sensors does not resolve the low voltage, the issue is likely a short to ground in the wiring harness. Carefully inspect the harness for any damage, repair any damaged wires, and ensure they are properly insulated.

5. 5

   Replace the ADIC module

   If the sensors and wiring have been ruled out, the ADIC module may have an internal fault in its 5-volt power supply. In this case, the instrument cluster itself must be replaced.