New Holland UCM 5132 – UCM: Bucket Rollback / Dump: Pin A Short to Power

The control module has sensed that the Right Joystick Right-Left signal has failed. The fault becomes active when the voltage on connector X-CN4A, pin 24 is greater than 4.8 V.

• L213
• L215
• L218
• L220
• L221
• L223
• L225
• L230
• C227
• C232
• C238
• B90B
• B100B
• SR175
• TR270

1. 1

   Probe UCM connector X-CN4A at pin 24 to verify if voltage is reading above 4.8 V, indicating an active short to power.

2. 2

   Inspect the signal wire between the right joystick and the UCM for a short circuit to another power source.

3. 3

   Check wiring harness connectors and the fuse panel for corrosion or burnt pins.

4. 4

   Isolate the joystick to determine if the short is in the machine's wiring harness or internal to the joystick sensor.

1. 1

   Power down the machine and disconnect the battery

   Perform this step if you are repairing a wiring harness short.

2. 2

   Repair or replace the damaged wiring section

   Do this if a short to power is found in the chassis harness.

3. 3

   Remove and replace the Right Joystick assembly

   Do this if the diagnostic checks point to an internal failure of the joystick sensor.

4. 4

   Calibrate the joystick

   After replacing the joystick, you must calibrate it using the Electronic Service Tool (EST).

5. 5

   Perform the calibration procedure

   Ensure the following prerequisite conditions are met: Joysticks must be in Neutral, Key ON, Engine ON, Hydraulics OFF, Operator Present in the seat, and there must be no active joystick-related fault codes. Open the 'Calibration' menu in the EST and follow the prompts.