Eaton Fuller Advantage (2017) Fault Code: 99 PID: SID 58 SPN: FMI: 14 Direction Mismatch: Special Instructions
Overview:
The Fuller Advantage transmission uses the X-Y Shifter to select the proper rail and engage or disengage a gear based on the driver’s selected mode of operation. The position of the X-Y Shift Finger is controlled and monitored by the Transmission Electronic Control Unit (TECU) by way of the X-Y Gear Position and Rail Position Sensors. Fault Code 99 is set when the TECU commands the X-Y Shifter to move to a specific position and the reported Shift Finger position achieved does not match the desired position.
Detection:
This fault can only be detected when there are no failures of the TECU or X-Y Position Sensors. This fault code is set when the X-Y Gear Position and Rail Position values are valid, but do not match the requested positions requested by the TECU.
Conditions to Set Fault Code Active:
FMI 14 – Special Instructions: If the requested gear position commanded by the TECU is different than the current Shift Finger position the fault code is set Active.
Fallback:
FMI 14
• “F” flashes in gear display.
• Service light flashes (if equipped).
• Transmission remains in current gear.
• May not engage a start gear from neutral.
• Engine may have to be shut down with the transmission still in gear.
• Audible warning tone sounds.
Conditions to Set Fault Code Inactive:
FMI 14: Neutral mode is selected and the system confirms Neutral.
Possible Causes:
FMI 14
1) TECU
– Internal failure
2) Transmission Harness
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground, shorted to power or open
3) X-Y Shifter
– Bent, spread, corroded or loose terminals
– Gear Position Sensor damaged
– Rail Position Sensor damaged
Component Identification:
None
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