Case IH FAE – Transmission Controller / TCU: Clutch E Solenoid Open Circuit Or Short To Ground

The transmission controller detects that the circuit for the Clutch E PWM (Pulse Width Modulation) solenoid is either broken (open) or shorted directly to the chassis ground.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 130
• Maxxum 135
• Maxxum 140
• Maxxum 145
• Puma 140
• Puma 165
• Puma 170
• Puma 180
• Puma 185
• Puma 195
• Puma 200
• Puma 210
• Puma 215

1. 1

   Check battery voltage to ensure the battery is fully charged and the alternator is functioning properly, as low system voltage can trigger false transmission codes.

2. 2

   Inspect the transmission extension harness and the main harness connections for corrosion, moisture ingress, or stretched/chafed wires leading to the transmission valve block.

3. 3

   Using a multimeter, check the resistance of the Clutch E solenoid circuit and test for continuity to ground to confirm if the short is in the wiring harness or internal to the solenoid itself.

1. 1

   Secure the Machine

   Park the tractor on level ground, place all shift levers in neutral, and block the front and rear wheels.

2. 2

   Locate the Solenoid

   Locate the transmission valve block and identify the Clutch E solenoid (often labeled or color-coded depending on the specific transmission variant).

3. 3

   Replace or Repair

   If the wiring harness is damaged, repair the open/shorted wire. If the solenoid tests faulty (internal open or short), remove the retaining hardware and replace the Clutch E PWM solenoid valve.

4. 4

   Reassemble

   Install the new solenoid. Apply a couple of drops of thread sealant (e.g., Loctite 542) to the retaining screws if applicable. Reconnect the electrical harness.

5. 5

   Perform Transmission Calibration

   Enter calibration mode (usually by holding the High and Low range buttons while starting the engine) and follow the on-screen prompts to recalibrate the clutch engagement. This is required whenever a PWM solenoid valve has been replaced, the non-volatile memory has been reset, or a mechanical repair has been effected.