Case IH FB5 – Secondary Controller (CFPS): Creeper Solenoid Over Voltage

The controller has detected that the voltage on the circuit supplying the creeper gear engagement solenoid is higher than the expected or allowable range.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Magnum Series
• Puma Series
• Maxxum Series

1. 1

   Check for other error codes that might indicate a broader electrical or charging system issue

2. 2

   Inspect external power supplies to verify that no jump box or incorrect charger is connected and feeding excessive voltage to the system

3. 3

   Check the charging system to ensure the alternator is not overcharging the battery, which can cause system-wide over-voltage faults

4. 4

   Inspect the wiring harness leading to the creeper solenoid for shorts to power, looking for rubbed wires where the solenoid circuit might be touching a higher-voltage supply line

5. 5

   Test the Creeper Solenoid by checking the resistance of the solenoid coil to ensure it has not failed internally

6. 6

   Check the Secondary Controller (CFPS) connections (e.g., connector C330) to ensure they are secure, not damaged, and that the pins are tight

1. 1

   Resolve the Voltage Source

   Based on the diagnostics, repair the wiring harness short, replace the faulty alternator, or replace the shorted creeper solenoid.

2. 2

   Reconnect Components

   Ensure all harness connectors are firmly seated and locked.

3. 3

   Clear the Code

   Use the tractor's diagnostic menu or an electronic service tool to clear the FB5 error code.

4. 4

   Test Operation

   Start the tractor and test the system for normal operation. Engage and disengage the creeper gear to ensure the code does not return.