Case IH 2205 (517961.06) - DEC – Transmission Controller (Trans / TCU): Clutch ODD Solenoid - LSD short to HSD

The fault indicates an electrical issue with the Clutch ODD Solenoid, specifically a Low Side Driver shorted to High Side Driver (LSD short to HSD).

• MAXXUM T4E
• Case IH Magnum 235 – 340 (Series 4)
• Case IH Maxxum Series
• Case IH Vestrum Series
• Case IH Magnum 7210
• Case IH Magnum 8910

1. 1

   Check the transmission wiring harness leading to the Clutch ODD solenoid for an open circuit, a short to ground, or a short between the Low Side Driver (LSD) and High Side Driver (HSD) wires.

2. 2

   Verify the 5-volt internal reference voltages at the transmission controller, as electrical shorts in the transmission system can pull down the reference voltage.

3. 3

   Check if the transmission controller has lost its calibration memory, which would leave the transmission clutches uncalibrated.

1. 1

   Locate the Clutch ODD Solenoid

   Locate the Clutch ODD Solenoid on the transmission control valve block.

2. 2

   Test the wiring harness

   Disconnect the solenoid and use a multimeter to test the wiring harness back to the Transmission Controller (TCU) for continuity and to ensure the LSD and HSD lines are not shorted together.

3. 3

   Test the solenoid internal resistance

   Test the internal resistance of the Clutch ODD Solenoid itself. If the coil is internally shorted, the solenoid must be replaced.

4. 4

   Repair wiring or replace solenoid

   Repair any damaged wiring in the harness or replace the faulty solenoid.

5. 5

   Perform transmission clutch calibration

   After the electrical repair is complete, perform a transmission clutch calibration procedure using the tractor's diagnostic interface to ensure the TCU relearns the engagement points for the odd clutches.