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Troubleshooting Gauge Wheel Sensor

Article ID: 2072
Last updated: 05 Jun, 2019
Revision: 13
Views: 1353

The gauge wheel sensor, or load pin, is an important component in the proper functioning of our hydraulic down force systems. If you notice that the sensor is not functioning properly, use the descriptions of different possible sensor statuses below to better diagnose and troubleshoot the issue.

Sensor shows N/A

What does this mean?

The Row Control Module (RCM) did not detect a gauge wheel sensor at start-up.

​Possible Causes:

  • Sensor is not connected to the RCM
  • Cable connection between sensor and RCM is not secured
  • Hardware failure in gauge wheel sensor, RCM I/O cable, or RCM
  • ECU Power below 10v on the ISO implement harness

What to do:

  • It is important for Support to know if it tends to happen on the same row or if it is random
  • Verify gauge wheel sensor is securely connected to RCM via the RCM I/O cable
    • Reboot the system after connecting the sensor to see if it is now recognized by the RCM.
  • Replace RCM I/O cable with known working cable
  • Replace RCM with known functional module from working row
  • If ECU power is below 10v, check all power connections from PCM to the IBBC

0-10 lbs at all times, or gauge wheel load is fluctuating slightly

What does this mean?

The system detects a load pin at system start-up, but it appears that it is not working properly.

Possible causes:

  • Low weight can be a REAL reading. We must verify that yes; there is force from the actuator and pressing down hard on the gauge wheels when the planter is in the dirt.  Problems with the planter and row unit itself can cause the row unit to not get in the ground and give the sensor a low reading.
    • Example: The row unit can be plowing at the row cleaner, but not allowing pressure on the gauge wheels.
    • Example: Errors in the row unit's depth setting components. Either damage on the depth gauge or the user has the wrong setting on a problem row.
    • Example: Opening disks can have bearings go out.
  • Sensor assignment is set incorrectly
  • Sensor is installed incorrectly
  • RCM is missing configuration information when loading an event (updating to firmware v3.5 will resolve this

What to do:

  • If there is pressure on the wheels (supplemental down force is being applied) and you still don't see proper readings (0-10 lbs), make sure that when the planter is raised the diagnostics show that the implement switches are going from a down-state, to an up-state. Wait at least 10 seconds. Raising the planter will make the sensors “re-zero”, which occurs after 6 seconds in the "up" position.
  • If there is pressure on the gauge wheels, the implement switch is working properly, and you are still seeing a gauge wheel load reading of 0-10 lbs, try changing the load-pin type using the steps outlined below. By doing this, the Row Control Module (RCM) will reset the current sensor type it is using. 
    • Steps to resend the gauge wheel sensor type to the RCMs:  

      1. Change the Gauge Wheel Sensor type
        • Go to the Home Screen
        • Enter the Setup wrench>Configuration wrench
        • Press Down Force to access the down force settings
        • Change the Gauge Wheel Sensor type to something different than what is being used (Deere, Kinze, White, etc.)
        • Press the green accept button at the bottom
        • Exit the Configuration Setup page by pressing the back arrow at the top of the page
      2. Load a new event to the Mapping Screen
        • Going to the mapping screen in between selecting load pins is very important. That triggers the display to send the currently configured load-pin type to the RCMs.
      3. Re-select the correct Gauge Wheel Sensor type
        • Enter the home screen
        • Enter back into the Configuration Setup
        • Press the Down Force Button to enter the settings
        • Change the Gauge Wheel Sensor to the correct type
        • Press the green accept button
        • Exit Configuration Setup
      4. Load an event and test system 
  • If this row still isn’t working properly, try moving the RCM I/O cable or RCM module, one at a time, to known working row, and see if the load pin reading follows the hardware. If the load pin reading follows the hardware, contact Support as we may want to bring that hardware back to Ag Leader for investigation.

Gauge wheel load reading is stuck on a number and never changes.

  • Follow steps in the previous section to resend the gauge wheel sensor type to the RCMs, but know that it is EXTREMELY important for us to know what you are seeing in the load-pin diagnostics.
  • Take pictures and videos of the sensor readings on the diagnostic screen.
  • Load pin reading 0-10 lbs and load pin stuck on a value are two different issues, which should be communicated differently and understood differently.

Other observed issues with gauge wheel sensors:

  • The system only detects the load-pin on start up.
    • Remember that it is required to reboot the modules after reconnecting a load-pin that shows NA. Sometimes it is easiest to pull the IBBC connection to reboot everything.
  • When using the Ag Leader IBBC ISOBUS Retrofit Kit, cycling power on the display will work to also power cycle the modules. Factory IBBC/hi-jack requires the key on the tractor to go off, then on again for modules to successfully reboot.
  • Incorrect gauge wheel sensor readings can be caused by cabling issues. Examples we've observed include: damaged pins on the RCM I/O main connector, pinched or corroded load pin wires, or pinched/broken RCM I/O cable wires.
  • The main implement harness should always be inspected for damage. Examples:
    • IBBC connector broken on the tractor causing pins to touch, but have a poor connection.
    • Harnesses stretched at fold points causing odd behavior.
    • The ECU power wire (the orange wire on the implement harness) has a blown 10 amp fuse.
      • This results in all power be drawn from the TBC power, which is a smaller gauge wire.

Content last reviewed on: 5/23/19
Reviewed by: JW