Case IH 42 – Transmission ECM: SOL_A_SHORT_12V_ERR 11 Fixed Crit.Dis

The condition triggers when the tractor is being operated and the Clutch Pack (A) PWM Solenoid becomes unexpectedly energized due to a short circuit to a 12-volt power source.

• JXC
• TN Series
• TNA Series
• TN55
• TN65
• TN70
• TN75
• TN60A
• TN70A
• TN75A
• TN85A
• TN95A
• Farmall series
• JXU series

1. 1

   Check for a short circuit to 12 volts in the wiring between Transmission ECM connector 1, pin 10 and the solenoid coil terminal

2. 2

   Check for a short to 12 volts between ECM connector 1, pin 6 and the solenoid coil terminal, or across the solenoid coil terminals themselves

3. 3

   Test the Clutch Pack (A) PWM Solenoid Coil for an internal short circuit

4. 4

   If the wiring and solenoid are intact, check the ECM for an internal driver shorted to 12 volts

1. 1

   Disconnect the tractor's battery before servicing electrical or transmission components.

   Safety First

2. 2

   Locate the Power Shuttle Control Valve Assembly on the transmission. Identify the Clutch Pack (A) solenoid, which is the bottom, horizontal solenoid on the valve assembly.

   Locate the Solenoid

3. 3

   Disconnect the wiring harness connector from the Clutch Pack (A) solenoid.

   Isolate the Circuit

4. 4

   Using a multimeter, check the harness side (specifically tracing back to ECM Connector 1, Pins 6 and 10) for unwanted 12V voltage when the key is on. If 12V is present where it shouldn't be, locate and repair the chafed/shorted wire in the harness.

   Test the Wiring

5. 5

   Measure the resistance across the solenoid coil terminals. If the coil is shorted out internally, remove the retaining hardware, extract the faulty solenoid from the valve body, and install a replacement.

   Test the Solenoid

6. 6

   If the wiring harness and the solenoid both test perfectly normal, the Transmission ECM has a faulty internal driver and must be replaced or sent out for repair.

   ECM Replacement (If Necessary)

7. 7

   Reconnect the solenoid harness, reconnect the battery, and clear the fault codes using the diagnostic menu to verify the repair.

   Reassembly