Case IH 517961-00 - DEC – DEC: Transmission A3 clutch solenoid maximum calibration current limit exceeded

During a transmission calibration routine, the electronic controller sends a varying electrical current to the A3 clutch solenoid to determine its engagement threshold. This fault indicates that the current required to achieve the expected clutch engagement (or the current drawn by the solenoid circuit) exceeded the maximum allowable limit programmed into the controller's software.

• MAGNUM AFS Connect

1. 1

   Check the wiring harness between the DEC and the A3 clutch solenoid for shorts to ground or shorts to power, which could cause an abnormally high current draw.

2. 2

   Measure the internal resistance (Ohms) of the A3 clutch solenoid using a multimeter to see if the coil has degraded or shorted internally.

3. 3

   Ensure there is no mechanical binding in the A3 clutch pack or hydraulic blockage in the valve body that would force the controller to command maximum current to achieve engagement during calibration.

1. 1

   Repair or replace

   Replace the faulty A3 clutch solenoid or repair the damaged wiring harness.

2. 2

   Calibrate

   Re-run the transmission calibration routine via the tractor's display monitor or dealer diagnostic tool.