Case IH 519013-05 - UCM – UCM: Front suspension rod control solenoid - Current Below Normal or Open Circuit

The control module has detected an open circuit or abnormally low current draw on the circuit for the front suspension rod control solenoid.

• MAGNUM AFS Connect
• Puma
• Magnum
• Maxxum
• Optum
• CVX series

1. 1

   Visually inspect the wiring harness running from the UCM to the front suspension control valve block for chafing, breaks, or pinch points

2. 2

   Disconnect the harness at the rod control solenoid and check for pushed-back pins, corrosion, or water ingress inside the connector

3. 3

   Measure the resistance across the pins of the solenoid coil using a multimeter to check for an open circuit (infinite resistance) or a burned-out coil

4. 4

   Check the continuity of the wiring harness between the solenoid connector and the UCM to test for a short to ground or an open break

5. 5

   Verify that the UCM is outputting the correct voltage to the solenoid when the suspension is commanded to move or calibrate

1. 1

   Park and secure tractor

   Park the tractor on a level surface, lower any implements, apply the parking brake, and turn off the engine.

2. 2

   Disconnect battery

   Disconnect the battery to prevent accidental short circuits and ensure safety while working on the UCM harness.

3. 3

   Locate valve block

   Locate the front suspension control valve block on the front axle.

4. 4

   Disconnect connector

   Disconnect the electrical connector from the faulty rod control solenoid.

5. 5

   Repair wiring

   If the wiring is damaged: Splice and repair the broken wires using weather-sealed connectors, or replace the damaged pigtail connector.

6. 6

   Replace solenoid coil

   If the solenoid coil is faulty: Remove the retaining nut at the end of the solenoid cartridge. Slide the old coil off the valve stem and install the new replacement coil. (Note: On some specific CNH valve blocks, the coil cannot be serviced separately, and the entire cartridge valve or valve block kit must be replaced).

7. 7

   Reconnect harness

   Reconnect the electrical harness to the solenoid.

8. 8

   Reconnect battery and clear codes

   Reconnect the battery and turn the key on. Clear the inactive fault codes from the UCM.

9. 9

   Test and calibrate

   Start the tractor and test the front suspension operation (raise, lower, and lock functions) to ensure the code does not return. A front suspension calibration via the tractor's display may be required after replacing suspension components.