Eaton Fuller Advantage (2017) Fault Code: 61 PID: SPN: 772 FMI: 5 Rail Motor Circuit: Current Below Normal or Open 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 1, 5 and 12 can be detected when the X-Y Rail Motor is energized.
Conditions to Set Fault Code Active:
FMI 5 – Current Below Normal or Open Circuit: Transmission fails to complete a shift, the measured current draw of the Rail Motor is below expected values and an open circuit or short to ground condition is detected for 0.5 seconds.
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 1, 5, 12: Set Inactive when the shift is completed.
Possible Causes:
FMI 1, 5
1) Transmission Harness
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground or open
2) X-Y Shifter Rail Motor
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground or open
– Rail Motor shorted to ground, partial short to ground, or open
– Rail Motor internal failure
3) TECU
– Internal failure
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