Case IH 12650 – Planter UCM (Universal Control Module): Pneumatic input supply port pressure sensor electrical error

The control module is detecting an abnormal analog voltage input from the pneumatic pressure sensor, indicating an above normal voltage or out-of-range signal typically caused by a wiring harness shorted to power or an internal sensor failure.

• 2150 Early Riser Agricultural Planters

1. 1

   Harness Inspection: Check the harness connection to the pneumatic pressure sensor to see if it is shorted to power (PWR).

2. 2

   Voltage Test: Use a multimeter to verify the analog input voltage at the UCM to confirm if it is reading above normal parameters.

3. 3

   Sensor Device Test: Isolate the sensor from the harness to determine if the short is in the wiring or if it is a device failure.

1. 1

   Locate sensor

   Locate the pneumatic pressure sensor on the implement's pneumatic supply line.

2. 2

   Inspect connector

   Disconnect the sensor harness and inspect the connector pins for damage, moisture, or corrosion.

3. 3

   Test wiring harness

   Test the wiring harness back to the Planter UCM for a short to power.

4. 4

   Repair or replace wiring

   If the harness is shorted, repair or replace the affected wiring section.

5. 5

   Replace sensor

   If the harness tests good, the pneumatic pressure sensor has suffered a device failure and must be replaced.

6. 6

   Clear fault codes

   Install the new sensor, reconnect the harness, and clear the fault codes from the UCM via the Pro 1200 or AFS Pro display.