Case IH 2596 (519168.15) - DEC – Transmission Controller (TCU): Even Clutch Pressure Sensor Signal higher than expected

The transmission's Even Clutch Pressure Sensor is sending a 'Signal higher than expected' to the control system, indicating a pressure or electrical voltage value that exceeds the normal operating limits for the current state of the clutch. This condition is typically caused by a failed sensor, a short-to-power in the sensor's wiring harness, or a sticking clutch solenoid valve causing an actual hydraulic overpressure situation.

• MAXXUM T4E
• Magnum 180
• Magnum 190
• Magnum 200
• Magnum 210
• Magnum 220
• Magnum 225
• Magnum 235
• Magnum 240
• Magnum 340
• Puma 165
• Puma 170
• Puma 180
• Puma 185
• Puma 195
• Puma 200
• Puma 210
• Puma 215
• Puma 220
• Puma 230
• Puma 240
• Optum 270
• Optum 300
• Steiger Series
• STX Series

1. 1

   Verify the transmission oil level is to specification and check the transmission oil filter for blockages or contamination

2. 2

   Inspect the wiring harness and the specific connector for the Even Clutch Pressure Sensor for mud, moisture contamination, or damaged wires that could cause a short circuit

3. 3

   Use the Case IH Electronic Service Tool (EST) or the tractor's TRANS VIEW monitor to watch the live status of the clutch pressure sensor while slowly cycling the clutch, looking for stuck high or erratic values

4. 4

   Check the corresponding clutch solenoid valve to ensure it is not mechanically stuck open, which would flood the clutch pack with excess hydraulic pressure

1. 1

   Locate the Sensor

   The transmission pressure sensors are generally accessible externally on the transmission housing.

2. 2

   Disconnect & Test

   Disconnect the electrical connector from the Even Clutch Pressure Sensor. Use a multimeter to test the harness for proper reference voltage and ensure there is no short-to-power in the signal wire.

3. 3

   Replace the Sensor

   If the wiring is intact and the live data showed an out-of-range value, the sensor has failed internally. Unthread the old sensor and install the replacement (these sensors are noted as being relatively inexpensive and easy to replace externally).

4. 4

   Clear Codes

   Clear the inactive fault codes from the TCU memory using the Case IH diagnostic tool (or the instrument cluster keypad, if the ICU software version permits).

5. 5

   Recalibrate

   Perform a transmission and clutch calibration procedure to ensure the TCU learns the engagement points of the new sensor for smooth shifting.