Case IH 2910-05 - DEC – DEC: PTO rear clutch solenoid electrical circuit fault current below normal

The control module is attempting to send an electrical signal to engage the rear PTO clutch solenoid, but it is not detecting the expected return current. This underlying condition is almost always caused by a broken wire, an unplugged connector, or a burnt-out solenoid coil.

• MAGNUM AFS Connect
• Maxxum 100
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 130
• Maxxum 135
• Maxxum 140
• Maxxum 145
• Maxxum 150
• Farmall 85C
• Farmall 95C
• Farmall 95U
• Farmall 105C
• Farmall 110U
• Farmall 115U
• Farmall 120U
• Magnum 235
• Magnum 260
• Magnum 290
• Magnum 315
• Magnum 340
• CVX140
• CVX150
• CVX160
• CVX175
• CVX195
• MXM175
• MXM190
• MXU100 to MXU135

1. 1

   Visually inspect the wiring harness leading to the rear PTO clutch solenoid on the rear axle/transmission housing for rubbed-through insulation, broken wires, or rodent damage

2. 2

   Inspect the electrical plug at the solenoid to ensure it is fully seated, clean, and free of moisture or corrosion

3. 3

   Perform a solenoid resistance test by disconnecting the solenoid and measuring resistance across the pins with a multimeter (an 'OL' or infinite reading means the coil is burnt out)

4. 4

   Perform a harness continuity test between the solenoid connector and the DEC module pins to locate any open wires if the solenoid tests within spec

5. 5

   Check all transmission and drivetrain control fuses to verify the 12V supply voltage is intact (a blown fuse causes an open circuit reading)

1. 1

   Safety First

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

2. 2

   Locate the Solenoid

   Locate the PTO rear clutch solenoid valve block, typically mounted on the rear transmission housing or integrated into the differential lock/PTO valve assembly.

3. 3

   Disconnect Wiring

   Carefully unplug the electrical harness connector from the faulty PTO solenoid.

4. 4

   Remove the Solenoid Coil

   Remove the retaining nut or fastener holding the solenoid coil to the hydraulic valve stem.

5. 5

   Replace the Component

   Slide the old solenoid coil off the valve cartridge. Slide the new OEM replacement solenoid onto the stem and secure it with the retaining nut. (Caution: Do not overtighten the nut, as this can crack the new coil housing).

6. 6

   Reconnect and Reassemble

   Plug the electrical connector back into the new solenoid, ensuring the locking tab clicks into place.

7. 7

   Test

   Reconnect the battery, turn the ignition on, and clear the inactive fault codes using a diagnostic tool or the tractor's onboard display. Start the tractor and engage the rear PTO to verify proper operation and ensure the code does not return.