John Deere 523888.04 – SIC: A37 - Stepper Motor E-SCV 2, Temperature Too Low

The temperature reading of the stepper motor for E-SCV 2 drops below 45°C (49°F), which usually indicates an open circuit, a failed internal temperature sensor within the stepper motor, or a wiring harness issue.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6220
• 6320
• 6420
• 6230
• 6330
• 6430
• 6820
• 6920
• 6930
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6230R
• 6250R
• 5090R
• 5100R
• 5115R
• 5125R

1. 1

   Inspect harness W32 (the stepper motor wiring harness) for chafing, breaks, or melted insulation.

2. 2

   Disconnect the 4-pin plug (X465) at the E-SCV 2 stepper motor (Component A37) and inspect the pins for corrosion, moisture, or pushed-out terminals.

3. 3

   Use a multimeter to check for continuity between the SIC controller and the X465 connector to rule out a broken wire in the CAN-BUS or power supply lines.

4. 4

   Ensure you do not also have code 523888.18 active, which indicates low supply voltage combined with low hydraulic oil temperature.

1. 1

   Relieve Hydraulic Pressure

   Turn off the tractor and cycle the hydraulic controls to relieve any trapped pressure in the SCV block before beginning work.

2. 2

   Disconnect the Motor

   Unplug the 4-pin electrical connector (X465) from the E-SCV 2 stepper motor.

3. 3

   Remove the Stepper Motor

   Unbolt the faulty stepper motor (A37) from the E-SCV 2 valve slice on the rear hydraulic block.

4. 4

   Install the New Motor

   Mount the replacement stepper motor to the valve block and torque the mounting bolts to OEM specifications.

5. 5

   Reconnect Wiring

   Plug the X465 connector back into the new motor.

6. 6

   Calibrate the Valve

   Connect John Deere Service ADVISOR (or use the tractor's onboard CommandCenter diagnostic interface if equipped). Navigate to the SIC module and perform the E-SCV calibration procedure so the controller can learn the end-stops of the new stepper motor.

7. 7

   Test Operation

   Start the tractor, warm up the hydraulic oil, and actuate SCV 2 to ensure smooth operation and verify the fault code has cleared.