Case IH 2090 – CCU (Central Control Unit) or MTA CCM (Transmission Control Module): ADIC absent on CAN

The central controller is not receiving CAN (Controller Area Network) bus communication messages from the ADIC (Analog-Digital Instrument Cluster).

• Farmall
• Farmall 40
• Farmall 45
• Farmall 50
• Farmall 90A
• Farmall 100A
• Farmall 110A
• Farmall 115U
• Farmall 115U PRO
• Maxxum Value Series
• Maxxum Pro Series
• CVX 1135
• CVX 1145
• CVX 1155
• CVX 1170
• CVX 1190
• CVX 1195
• CVT 1135
• CVT 1145
• CVT 1155
• CVT 1170
• CVT 1190
• CVT 1195
• MX Magnum

1. 1

   Check Power and Ground: Verify that the ADIC is receiving proper voltage. Check the instrument cluster's fuses, relays, and ground connections. Look for related fault codes (e.g., 14015 or 14016, which indicate the ADIC 5-volt reference voltage is either too low or too high).

2. 2

   Inspect the CAN Bus Wiring: Check the CAN High and CAN Low wires between the ADIC and the CCU/TCU for continuity, shorts to ground, or open circuits.

3. 3

   Inspect Connectors: Check the ADIC wiring harness connectors for moisture, corrosion, or bent pins (a common issue if the cab has been pressure washed).

4. 4

   Verify ADIC Operation: Determine if the instrument cluster powers on at all. If the screen is blank and gauges are dead, the module itself may have failed internally.

1. 1

   Disconnect Battery

   Always disconnect the battery before servicing CAN bus modules to prevent electrical spikes.

2. 2

   Access the ADIC

   Remove the steering column shrouds or dashboard trim panels required to access the rear of the instrument cluster.

3. 3

   Clean and Re-seat Connectors

   Disconnect the ADIC harness. Clean the pins with electrical contact cleaner, apply dielectric grease, and firmly re-seat the connector. Reconnect the battery and test if code 2090 clears.

4. 4

   Repair Wiring

   If continuity tests reveal a break in the CAN lines or power supply lines, repair the damaged section of the wiring harness.

5. 5

   Replace or Rebuild the ADIC

   If the wiring is intact and power/ground are verified but the ADIC still fails to communicate, the cluster must be replaced or sent to a specialist for board-level repair (companies like Breizelec or Diagcar Electronics service these specific boards).

6. 6

   Configuration/Calibration

   If installing a new ADIC, it must be configured for the specific tractor. For example, on Maxxum models, a new ADIC comes configured for a 12x12 mechanical transmission by default. If fitted to a 16x16 or 24x24 transmission without being reconfigured via the dealer service tool or keypad sequence, it will cause additional speed sensor and CAN errors.