Eaton Fuller Advantage (2017) Fault Code: 61 PID: SPN: 772 FMI: 6 Rail Motor Circuit: Current Above Normal or Shorted Circuit

Overview:
The Fuller Advantage Transmission is equipped with an X-Y Shifter that selects a transmission gear. The X-Y Shifter motors are controlled with electrical current supplied by the TECU to move the Shift Finger either side-to-side (rail selection) or fore-and-aft (gear engagement and disengagement). Fault Code 61 indicates a failure with the circuit controlling the Rail Motor and the side-to-side movement of the X-Y Shift Finger.

Detection:
The system can identify an issue with the X-Y Shifter Rail Motor circuit, the TECU rail motor controller or the power and ground connections to the TECU under the following conditions:
• FMI 6 can be detected when the X-Y Rail Motor is not energized

Conditions to Set Fault Code Active:
FMI 6 – Current Above Normal or Shorted Circuit: TECU detects a short to power on the Rail Motor circuit for 0.5 seconds at power up or prior to a shift.

Fallback:
All FMIs
• “F” flashes in gear display.
• Service light flashes (if equipped).
• Engine may not crank.
• Transmission may not engage a gear from neutral.
• Transmission does not shift while vehicle is moving.
• Until fault becomes Inactive, driver may have to shut off engine with transmission in gear.

Conditions to Set Fault Code Inactive:
FMI 6: An electrical short or open circuit is not detected for 0.5 seconds.

Possible Causes:
FMI 6
1) Transmission Harness
– Wiring shorted to power
2) TECU
– Internal failure