Case IH 2243 (519182.04) - DEC – DEC (TCU): Synchro 8 Solenoid - short to GND

The electrical circuit controlling the "Synchro 8" transmission solenoid has shorted to ground.

• MAXXUM T4E
• CX series
• MX series
• MC series
• MTX series

1. 1

   Inspect the wiring harness for areas where wire insulation may have rubbed through, causing a direct short to the chassis (ground)

2. 2

   Check the electrical connector at the Synchro 8 solenoid for loose connections or bent pins

3. 3

   Test the internal coil of the Synchro 8 solenoid to see if it has shorted out

4. 4

   Check the Transmission Control Unit (TCU) for an internal failure if the wiring and solenoid are intact

1. 1

   Locate the Synchro 8 Solenoid

   Find the solenoid valve block on the transmission.

2. 2

   Inspect the Connector

   Disconnect the harness from the Synchro 8 solenoid. Check for loose, corroded, or bent pins.

3. 3

   Test the Wiring Harness

   Trace the wiring back to the TCU. Use a multimeter to test for continuity to ground. If a short to ground is found in the harness, repair or replace the damaged wiring section.

4. 4

   Test the Solenoid Coil

   Test the solenoid coil for an internal short. If the coil has failed, it must be replaced.

5. 5

   Evaluate the TCU

   If the connector, wiring harness, and solenoid coil all test perfectly fine, the TCU may require replacement or reprogramming due to an internal failure.