Case IH 33 – Transmission ECM: SOL_DUMP_SHORT_DIS_ERR / SOL_DUMP_SHORT_ERR (Dump Solenoid Coil Short Circuit)

The system has detected a short circuit in the transmission's dump solenoid circuit. This fault triggers while the tractor is being driven in forward or reverse, or while the tractor is in neutral.

• JXC
• TN Series
• TNA Series
• TNDA Series
• TNSA Series
• TN60A
• TN70A
• TN75A
• NT75D

1. 1

   Disconnect the control panel and the connections on the Transmission ECM to inspect the harness.

2. 2

   Perform a pin-to-pin test between ECM connector 1, pin 18 (CN1-18) and ECM connector 1, pin 2 (CN1-2) for a short circuit (also check between CN1-16 and CN1-4 depending on harness version).

3. 3

   Perform a voltmeter test by connecting the red lead (+) to CN1-18 and the black lead (-) to a good chassis ground.

4. 4

   Inspect the dump solenoid directly and test for a dead short across the two coil terminals.

5. 5

   If the wiring harness and solenoid coil test within normal specifications and show no shorts to ground, suspect a faulty Transmission ECM.

1. 1

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

2. 2

   Locate the transmission control valve assembly where the Dump Solenoid is mounted.

3. 3

   Disconnect the electrical connector from the Dump Solenoid.

   Inspect the connector for melted plastic, water ingress, or chafed wires that could be causing the short.

4. 4

   Remove the retaining bolts holding the solenoid and valve assembly to the transmission housing.

   Perform this step if the solenoid coil was proven faulty during diagnostics.

5. 5

   Remove the old dump solenoid.

6. 6

   Coat the new valve components and O-rings with clean transmission oil prior to assembly.

   Case IH Akcela Nexplore Fluid is recommended by the OEM.

7. 7

   Install the new Dump Solenoid.

   Tighten the retaining bolts to a torque value of 27 Nm (20 lb-ft).

8. 8

   Reconnect the wiring harness to the solenoid.

9. 9

   Clear the fault codes using the Electronic Service Tool (EST) or the tractor's H Menu diagnostic interface.

10. 10

    Start the tractor and test drive in forward, reverse, and neutral.

    Verify the Transmission Status Lamp remains off and the code does not return.