John Deere 524234.04 – Transmission Control Unit (PTR / PTQ / PTI / EPC): Enable Transmission Pressure Sensor Voltage Too Low

The transmission control module has detected an issue with the Enable Transmission Pressure Sensor (B105). The circuit voltage is too low (below 0.3V) or the registered pressure is abnormally low (below 50 kPa), indicating an open circuit, a short to ground, a faulty sensor, or genuinely low enable pressure caused by a failing solenoid.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5045E
• 5055E
• 5065E
• 5075E
• 5065M
• 5075M
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 7J Series

1. 1

   Visual Wiring Inspection: Inspect the wiring harness and connectors at the clutch enable pressure sensor (B105) and the clutch enable solenoid for damage from field debris.

2. 2

   Voltage & Circuit Test: Use a multimeter to measure the voltage at the transmission enable sensor. Check for an open circuit or a short to ground, and ensure all ground connections are secure and free of corrosion.

3. 3

   Clutch Enable Pressure Test: Hook up a manual pressure gauge or use the tractor's diagnostic display (e.g., PTI Address 024) to verify actual pressure. If the pressure stays at 0, check the harness connection at the clutch enable solenoid.

1. 1

   Relieve Pressure

   Before disconnecting any hydraulic components, turn off the engine and relieve hydraulic pressure to avoid injury from high-pressure fluid.

2. 2

   Repair Wiring

   If the visual inspection or multimeter test reveals a short to ground or an open circuit, repair the damaged section of the wiring harness or replace the damaged connector pigtail.

3. 3

   Replace the Sensor

   If the wiring is intact, the solenoid is receiving power, and the sensor is still outputting below 0.3V (or reading false low pressure), remove and replace the Enable Pressure Sensor (B105).

4. 4

   Address the Solenoid

   If the pressure test confirmed that actual hydraulic pressure is zero, and the wiring to the solenoid is good, replace the clutch enable solenoid.

5. 5

   Clear and Test

   Reconnect all components, clear the fault codes via the CommandCenter or diagnostic tool, and restart the tractor. Shift through the gears to ensure the transmission engages and the code does not return.