Case IH 2352 (517966.15) - DEC – Transmission Control Module (TCM): Clutch A solenoid - short to high voltage

The control module is detecting electrical current flowing through the Clutch A solenoid circuit even when the module has commanded the solenoid to be turned off. This typically points to a wiring harness shorting to a +12V power source, or an internal failure within the solenoid itself.

• VESTRUM CVX
• Magnum Series (235 - 340 Series 4)
• Steiger Series (350 to 600)
• Puma Series (160, 165, 180, 195, 210, 225)
• Maxxum / MXM Series (MXM175, 5120)

1. 1

   Inspect the transmission wiring harness between the TCM and the transmission control valve block for chafing, rubbed-through insulation, or rodent damage (common cause of short-to-power faults).

2. 2

   Perform a voltage check: With the tractor off, disconnect the electrical connector at the Clutch A solenoid. Turn the key to the ON position (engine off) and probe the signal wire. A +12V reading indicates the harness is shorted to power.

3. 3

   Measure the resistance across the pins of the Clutch A solenoid and compare to OEM specifications (typically 7-10 ohms). Out of spec resistance or continuity to the solenoid body indicates an internal short.

4. 4

   Disconnect the main connectors at the TCM and inspect the pins for corrosion, moisture ingress, or bent terminals that could bridge circuits.

1. 1

   Disconnect Power

   Disconnect the tractor's battery to prevent electrical spikes during the repair.

2. 2

   Address Wiring (If Applicable)

   If the diagnostic tests revealed a harness short, locate the damaged section. Splice and repair the wire using weather-sealed heat-shrink connectors, or replace the affected transmission harness section.

3. 3

   Access the Valve Block

   If the solenoid is faulty, locate the transmission control valve block (typically mounted on the right-hand side of the transmission housing).

4. 4

   Remove the Solenoid

   Clean the area thoroughly to prevent dirt from entering the hydraulic circuit. Remove the retaining bracket or bolt holding the Clutch A solenoid in place, and pull the solenoid straight out of the valve block.

5. 5

   Install the New Solenoid

   Lubricate the O-rings on the new solenoid with clean transmission fluid. Insert it into the valve block and torque the retaining bolt to OEM specifications.

6. 6

   Reassemble and Clear Codes

   Reconnect the electrical harness and the battery. Use the tractor's diagnostic menu (or a service tool) to clear the stored 2352 fault code.

7. 7

   Perform Clutch Calibration

   Start the tractor and warm the transmission oil to a minimum of 60°C (140°F). You must perform a Transmission Clutch Calibration procedure so the TCM can learn the hydraulic fill time for the new solenoid. Failure to calibrate will result in harsh shifting and secondary fault codes.