Case IH 2249 (519183.04) - DEC – DEC (Drivetrain Electronic Controller): Synchro S Solenoid Short to Ground

The DEC has detected a 'Short to Ground' on the circuit controlling the Synchro S Solenoid. This means the voltage on the solenoid's control wire is lower than expected, typically caused by chafed wiring touching the chassis, a melted connector, or an internal short inside the solenoid coil itself.

• MAXXUM T4E
• CX50
• CX60
• CX70
• CX80
• CX90
• CX100
• MX80C to MX285
• MX100 to MX270
• Magnum 225
• Magnum 235
• Magnum 250
• Magnum 255
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 305
• Magnum 310
• Magnum 315
• Magnum 335
• Magnum 340
• Magnum 370
• Magnum 380
• Steiger 350 through 620
• Quadtrac 350 through 620
• 7010-9250 series
• 75XT-95XT

1. 1

   Disconnect the 2-pin plug at the Synchro S solenoid and measure the resistance across the two pins. A healthy coil should measure exactly 6.8 Ohms. If it reads 0 Ohms or significantly lower, the coil is internally shorted.

2. 2

   Inspect the wiring harness from the DEC to the solenoid. Look for rubbed-through insulation or pinched wires shorting against the tractor frame or transmission housing.

3. 3

   With the key ON, check the supply voltage at the connector to ensure the controller is sending the commanded 12V signal.

1. 1

   Locate solenoid

   Locate the Synchro S / Powershift solenoid on the transmission valve block.

2. 2

   Disconnect plug

   Disconnect the 2-pin electrical plug.

3. 3

   Clean area

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

4. 4

   Remove faulty solenoid or coil

   The solenoid is a bolt-on style with an M20 x 1.5 metric thread. Unbolt the faulty solenoid assembly or remove the retaining nut to slide off just the coil (depending on which part is shorted).

5. 5

   Install new part

   Install the new solenoid/coil, thread it in carefully, and torque to standard specifications for M20 hydraulic fittings.

6. 6

   Reconnect and clear codes

   Reconnect the 2-pin plug and clear the fault codes from the DEC.