Case IH F13 – Transmission Controller: Upshift and downshift switches both closed / Open circuit from fuse 13

The transmission controller is receiving a simultaneous electrical signal from both the upshift and downshift buttons on the gear shift lever, or on CFPS units, there is a loss of power or broken connection on the circuit protected by Fuse 13.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• MX80C
• MX90C
• MX100
• MX110
• MX120
• MX135
• MX150
• MX170
• TM115
• TM190

1. 1

   Check for operator error to ensure both upshift and downshift buttons are not being pressed simultaneously

2. 2

   Enter the tractor's 'H5' menu mode (Switch Test) to monitor live switch states and determine if a button is mechanically stuck or internally shorted closed

3. 3

   Inspect Fuse 13 in the cab fuse panel for a blown filament or open circuit (specifically on CFPS units)

4. 4

   Use a multimeter to check the wiring harness between the gear shift lever and the transmission controller for shorts to ground or open circuits

1. 1

   Clear Operator Error

   If both switches were manually depressed by the driver, simply release the switches to automatically resume normal operation.

2. 2

   Replace the Shift Knob

   If the H5 switch test confirms a switch is permanently closed, remove the steering column covers or side console trim, disconnect the wiring harness, remove the faulty gear lever knob, install the new unit, and reassemble.

3. 3

   Repair Open Circuit

   If Fuse 13 is blown, trace the wiring harness for a short to ground (chafed wires rubbing against the chassis), repair the damaged wire, and replace Fuse 13.

4. 4

   Clear Codes

   Enter the 'HB' menu (Display of Stored Error Codes) to clear the F13 code from the microprocessor's non-volatile memory, then test drive the tractor to ensure normal upshifting and downshifting are restored.