Case IH 2016 (517960.06) – Transmission Control Unit (TCU / TRANS) or Chassis/Armrest controller: Creeper Solenoid Short circuit

The electrical circuit controlling the transmission's creeper gear engagement has failed open, shorted to ground, or shorted to a high voltage source.

• MAXXUM T4E
• Magnum 7110
• Magnum 7120
• Magnum 7130
• Magnum 7140
• Magnum 7150
• Magnum 7210
• Magnum 7220
• Magnum 7230
• Magnum 7240
• Magnum 7250
• Magnum 8910
• Magnum 8920
• Magnum 8930
• Magnum 8940
• Magnum 8950
• Puma 150
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• Puma 225
• Maxxum series
• Steiger series

1. 1

   Perform a coil resistance test: Disconnect the creeper solenoid and measure resistance across the coil pins (expected: 6 to 8 Ohms). If outside this range, the solenoid is internally shorted or open.

2. 2

   Inspect the wiring harness: Check the chassis harness leading to the transmission control valve assembly for chafed wires, melted insulation, or corrosion at the connector.

3. 3

   Perform a voltage/short check: Disconnect the transmission controller connector, turn the ignition ON, and measure voltage between the creeper solenoid signal wire pins and ground to check for a short to positive voltage.

1. 1

   Prepare tractor for repair

   Park the tractor on a level surface, engage the parking brake, and turn off the engine. Disconnect the battery to prevent electrical shorts during repair.

2. 2

   Locate the valve assembly

   Locate the transmission control valve assembly. The creeper solenoid valve is typically mounted on the creeper valve body / lower plate on the transmission housing.

3. 3

   Disconnect harness

   Disconnect the electrical wiring harness connector from the creeper solenoid.

4. 4

   Clean the area

   Clean the area around the solenoid to prevent dirt from entering the transmission hydraulic circuit.

5. 5

   Remove faulty solenoid

   Unbolt and remove the faulty creeper solenoid valve from the valve block.

6. 6

   Lubricate seals

   Lubricate the O-rings/seals on the new solenoid valve with clean transmission fluid.

7. 7

   Install new solenoid

   Install the new creeper solenoid valve and tighten the retaining hardware to OEM torque specifications.

8. 8

   Reconnect harness

   Reconnect the electrical harness connector.

9. 9

   Reconnect battery and clear codes

   Reconnect the battery, start the tractor, and clear the inactive fault codes from the display.

10. 10

    Test operation

    Test the tractor by shifting into the creeper gears to ensure smooth low-speed control and verify the fault code does not return.