Case IH 2743 (517967.11) - DEC – DEC / TCM: Clutch B Solenoid Error

An electrical or hydraulic malfunction in the proportional solenoid valve that controls the engagement of Clutch B inside the transmission.

• VESTRUM CVX
• MXM Series (MXM 120, 130, 140, 155, 175, 190)
• Maxxum Series (Tier 3 and newer)
• Puma Series (e.g., Puma 210)
• Farmall Pro EP Series (95U, 105U, 115U)

1. 1

   Inspect the transmission wiring harness for short circuits to ground or battery, specifically on the proportional valve circuit for Clutch B and the valve power supply (VPS1).

2. 2

   Use a DVOM to test the resistance of the Clutch B solenoid to ensure it is not internally open or shorted.

3. 3

   Verify if the issue is hydraulic rather than electrical by checking for a mismatch between the Clutch B pressure sensor reading and the solenoid current.

4. 4

   Attempt to recalibrate the transmission clutches by entering the H-Menu or calibration mode and using the 'h' (increase) and 'm' (decrease) buttons, or the downshift button, to step through clutches A, B, C, D, and E.

1. 1

   Access the valve block

   Locate the transmission control valve block on the side of the transmission housing.

2. 2

   Inspect the harness

   Disconnect the main TCM harness and the specific connector for the Clutch B solenoid. Clean the contacts and check for pushed-out pins or corrosion.

3. 3

   Replace the solenoid

   If the solenoid fails the resistance test or is mechanically stuck, remove the retaining bolt or bracket for the Clutch B solenoid valve and extract the valve.

4. 4

   Install new valve

   Lubricate the O-rings on the new solenoid valve with clean transmission fluid, insert it into the valve block, and torque the retaining fastener to OEM spec.

5. 5

   Clear codes and calibrate

   Reconnect the battery and clear the inactive fault codes using an EST laptop or the keypad. Perform a full transmission clutch calibration to teach the TCM the fill times and engagement pressures for the new Clutch B solenoid.