Case IH r – Hitch Controller: Loss of 5 volt regulator

The internal 5-volt regulator inside the controller has failed or is operating out of range, or the controller is experiencing a severe drop in supply voltage (battery voltage dropping below 9.8 volts).

• MX Maxxum
• 7200/8900 series Magnum
• Case IH Magnum 7100 Series
• Case IH Magnum 7200 Series
• 7110
• 7120
• 7130
• 7140
• 7150
• 7210
• 7220
• 7230
• 7240
• 7250

1. 1

   Test Battery Voltage: Ensure the tractor battery circuit output is not dropping below 9.8 volts.

2. 2

   Check Power Stud: Inspect the battery and cab power stud located on the cab floor RH (Right Hand) console.

3. 3

   Check Fuses: Verify that Fuse #7 is not blown or defective.

4. 4

   Test Connector Power: Turn the key to the 'ON' position and check pin 14 of the 16-pin connector at the module for power.

5. 5

   Test Connector Ground: Check pin 1 of the 16-pin connector to ensure the control module has a solid ground.

6. 6

   Check Relays (Early Models): For 7200 series tractors below serial number JJA0064978, check if Relay #6 is defective.

1. 1

   Verify Connections

   Make sure the controller has a good connection to the battery and is properly grounded based on the diagnostic checks above.

2. 2

   Clear the Code

   Turn the key switch to the OFF position, then back to the ON position to clear the fault code.

3. 3

   Evaluate

   If the 'r' code is recorded again (or occurs more than once on tractors between SN: JJA0067094 - JJA0068206), the controller's internal 5V regulator has permanently failed.

4. 4

   Replace the Module

   Remove the defective Hitch Controller and install the replacement unit.

5. 5

   Recalibrate

   The hitch must be recalibrated every time a hitch component (including the controller) is replaced or adjusted. Run the standard hitch calibration procedure for your specific tractor series.