Case IH 14098 – Transmission Controller (TCU) or ADIC (Analogue Digital Instrument Cluster): Transmission oil pressure sensor - open circuit or short circuit to ground

The control module is either not detecting a signal from the transmission oil pressure sensor (open circuit) or the signal wire is shorted directly to a ground source.

• Maxxum
• Maxxum Series (5120, 5130, 5140, 5150, 5220, 5230, 5240, 5250)
• Puma Series
• Magnum Series
• Steiger Series
• CVT / Profi Series

1. 1

   Inspect the wiring harness leading to the transmission oil pressure sensor for visible damage, chafing, melting, or disconnected plugs

2. 2

   Disconnect the sensor and use a multimeter to check the signal wire for continuity to the transmission controller. Test the signal wire for a short to ground.

3. 3

   Verify that the sensor is receiving the correct 5V reference voltage and has a solid ground at the connector

4. 4

   Verify the transmission fluid level and condition if erratic pressure readings preceded the failure

1. 1

   Locate the Sensor

   Find the transmission oil pressure sensor on the transmission case. On many models, this requires removing a small access panel or cab floor plate to reach the sensor block.

2. 2

   Disconnect

   Unplug the electrical connector from the sensor.

3. 3

   Remove

   Unscrew the old sensor from the transmission housing. Have a rag ready, as a small amount of transmission fluid may weep from the port.

4. 4

   Install

   Apply a dab of hydraulic thread sealant to the threads of the new sensor (if it does not come pre-applied with thread locker/sealant). Thread the new sensor into the port and tighten to OEM specifications.

5. 5

   Reconnect

   Plug the factory wiring harness back into the sensor.

6. 6

   Clear Codes

   Use the tractor's Electronic Service Tool (EST) or the in-cab diagnostic menu to clear the inactive 14098 fault code.

7. 7

   Test

   Start the tractor, allow it to reach operating temperature, and verify that the transmission pressure reads correctly on the display without the code returning.