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Eaton Fuller Advantage (2017) Fault Code: 84 PID: SPN: 751 FMI: 13 Shift Device Not Configured: Out of Calibration

Overview:
The Fuller Advantage transmission may be equipped with an analog Shift Control Device. The Transmission Electronic Control Unit (TECU) supplies the analog Shift Control Device a 5-volt reference through OEM wiring. This voltage is reduced by resistive ladder circuitry in the Shift Device, based on the position the driver selects. The return voltage to the TECU indicates the position of the Shift Lever. Fault Code 84 indicates that the TECU detected an incorrect Driver Interface Type configuration.

Detection:
The TECU determines the type of Shift Control Device the vehicle is equipped with during the initial power up. Fault Code 84 sets Active when the stored Driver Interface Type configuration in the TECU does not match the Shift Device on the vehicle, provided there are no low battery system fault codes set.

Conditions to Set Fault Code Active:
FMI 13 – Out of Calibration: The stored Driver Interface Type configuration file does not match the Shift Device on the vehicle.

Fallback:
FMI 13
• “F” flashes in gear display.
• Service light flashes (if equipped).
• Engine may not crank.
• Transmission will not engage a gear from neutral.

Conditions to Set Fault Code Inactive:
FMI 13: This fault code is never set Inactive. Fault Code 84 only sets in an Active state.

Possible Causes:
FMI 13
1) TECU
– Driver Interface Type configuration incorrect or unknown