Case IH 22 – Transmission ECM: Solenoid A Short Circuit Error

This fault code indicates a power supply diagnostic error on the Solenoid A (Forward/Clutch A) circuit. The system has detected a short to ground, a short to a 5V/12V power supply, or an open circuit. As a safety measure, the controller disables the solenoid valves, resulting in the clutch pedal and shuttle lever being disabled (CP/SL Dis).

• JXC
• Farmall C
• Farmall 95U
• Farmall 105U
• Farmall 115U
• JX
• JXU
• Maxxum 100-140
• Puma
• TN60A
• TN70A
• TN75A
• TN95A
• T4
• T5000
• T6000

1. 1

   Inspect the wiring harness between the Transmission ECM and Solenoid A for chafed wires causing a short to ground or power.

2. 2

   Disconnect the Solenoid A and Transmission ECM connectors to check for bent pins, moisture, or corrosion.

3. 3

   Measure the resistance of Solenoid A with a multimeter to check for thermal degradation or an internal short.

4. 4

   Verify that the 5V and 8V sensor supply circuits from the ECM are intact and not shorting out the controller.

1. 1

   Disconnect power

   Before carrying out any electrical service operations, disconnect and isolate the battery negative lead.

2. 2

   Locate Solenoid A

   Locate the transmission control valve block (usually on the side of the transmission housing) and identify Solenoid A (Forward/Clutch A solenoid).

3. 3

   Repair wiring

   If diagnostic checks revealed a broken or chafed wire in the transmission harness, repair the wire using appropriate weatherproof splices or replace the affected harness section.

4. 4

   Replace solenoid

   If the solenoid coil failed the resistance test, remove the retaining bolt/nut holding the solenoid coil to the valve spool. Slide the old solenoid off and install the new OEM replacement.

5. 5

   Reassemble components

   Reconnect the electrical connector to the solenoid, ensuring the weather seal is intact.

6. 6

   Test and calibrate

   Reconnect the battery negative lead. Start the tractor and verify that the fault code is cleared. Test the forward/reverse shuttle operation. Perform a transmission clutch calibration routine if required by the specific model.