Case IH 5215 – Universal Control Module (UCM) / Instrument Cluster (IC) / Engine Control Unit (ECU): Left Joystick Forward-Back Axis Pin B Shorted To Power

The machine's control system has detected that the electrical signal coming from Pin B on the Forward-Back (FB) axis sensor of the left-hand joystick is shorted directly to a power source. This prevents the machine from accurately reading the operator's forward or reverse inputs.

• skid steer
• Skid Steer Loaders (SSL)
• Compact Track Loaders (CTL)
• SR200
• SR210
• SR250
• TR320
• TV380

1. 1

   Visually inspect the base of the left joystick and wiring harness for chafed, pinched, or melted wires that could bridge the Pin B wire to a 12V power supply.

2. 2

   Disconnect the left joystick harness and inspect the pins for corrosion, moisture, or bent terminals that could cause a short across the pins.

3. 3

   With the joystick disconnected, use a digital multimeter to check for voltage on the machine-side harness at Pin B. If voltage is present, the short to power is in the machine's wiring harness.

4. 4

   If the machine-side harness tests fine (no short to power), the short is internal to the left joystick's Forward-Back axis sensor, meaning the joystick assembly must be replaced.

1. 1

   Power Down

   Turn off the machine, lower the loader arms (if possible), and disconnect the negative battery cable to prevent electrical damage.

2. 2

   Access the Joystick

   Remove the left-hand control panel or boot to access the base and wiring of the left joystick.

3. 3

   Disconnect

   Unplug the electrical harness connector from the left joystick.

4. 4

   Removal

   Remove the mounting hardware securing the joystick. OEM diagrams note a locking Hex Socket Screw (#10-32 x 5/8") and an M12 x 1.75 (Class 8) Hex Nut securing the rod/base.

5. 5

   Replacement

   Install the new left joystick grip/assembly and tighten the mounting hardware.

6. 6

   Reassembly

   Reconnect the electrical harness and reinstall the protective boot or panel.

7. 7

   Calibration

   Reconnect the battery. Perform a 'Left joystick calibration' procedure using the electronic service tool (EST) so the control module can learn the new joystick's neutral, maximum forward, and maximum reverse parameters.