Case IH 2349 – Transmission Control Module (TRANS): High range clutch solenoid - open circuit or short circuit to ground

The controller has detected a break in the wiring (open circuit), a wire touching the chassis/ground (short to ground), or a failed solenoid coil. In Semi-Powershift (SPS) models, this code can also indicate an overvoltage condition on the high range clutch solenoid circuit.

• Magnum
• Puma/Mid Range Magnum
• Steiger T4B
• Case IH Puma series
• Case IH Steiger series
• Case IH Maxxum series
• Case IH MX / TG series
• Case IH Farmall series

1. 1

   Disconnect the high range clutch solenoid and measure the resistance across its pins. The resistance should be between 8 to 11 Ohms.

2. 2

   Visually inspect the transmission wiring harness. A common issue on these tractors is the harness rubbing against hydraulic pipes, causing the insulation to wear away and shorting the wires to ground.

3. 3

   If the solenoid resistance is within spec, check for a short to positive voltage or ground in the harness. Disconnect the UCM connector (e.g., X-950), turn the ignition switch to the ON position, and measure the voltage between specific connector pins (e.g., X-643 pin 1, wire 7220 (GY) to ground, and X-643 pin 2, wire 57UE (BK) to ground).

1. 1

   Secure the Machine

   Park the tractor on a level surface, engage the parking brake, and turn off the engine.

2. 2

   Locate the Solenoid

   Locate the transmission valve block where the clutch solenoids are housed (refer to your specific model's hydraulic/transmission schematic to identify the High Range solenoid specifically).

3. 3

   Repair Wiring

   If the diagnostic tests revealed a short or open circuit in the harness (such as rubbed wires), repair the damaged section of the wiring harness using proper weather-sealed connectors, or replace the harness section. Reroute the harness away from hydraulic lines to prevent future chafing.

4. 4

   Replace the Solenoid

   If the solenoid failed the 8-11 Ohm resistance test, clean the area around the solenoid, disconnect the electrical connector, unbolt/unscrew the faulty solenoid, and install the new solenoid with new O-rings (lubricated with clean transmission fluid). Torque to OEM specifications and reconnect the wiring harness.

5. 5

   Clear Codes and Calibrate

   Clear the fault codes using the tractor's diagnostic menu or a CNH EST diagnostic tool. Perform a transmission/clutch calibration routine after replacing a clutch solenoid to ensure smooth gear transitions.