Eaton Fuller Advantage (2017) Fault Code: 11 PID: SPN: 629 FMI: 12 No TECU Operation: Bad Intelligent Device

Posted by PerDiezel Solutions on May 12, 2026

Overview:
The Fuller Advantage transmission is equipped with a Transmission Electronic Control Unit (TECU). The TECU performs a variety of functions including receiving inputs from sensors, sending outputs to control devices, operating X-Y Shifter motors and actuators and making shift decisions. Fault Code 11 indicates an internal failure of the TECU.

Detection:
The TECU performs a self-check during power up, any failure detected sets this fault.

Conditions to Set Fault Code Active:
FMI 12 – Bad Intelligent Device: TECU detects an internal failure.

Fallback:
FMI 12
• “F” flashes in gear display.
• Service light flashes (if equipped).
• Engine may not crank.
• Transmission may not attempt to shift.
• Transmission may not confirm neutral.
• Engine may have to be shut down with transmission still in gear.

Conditions to Set Fault Code Inactive:
FMI 12: Transmission powers up and the failure is no longer detected by the TECU.

Possible Causes:
1) TECU
2) Internal failure

Eaton Fuller Advantage (2017) Fault Code: 11 PID: SID 254 SPN: FMI: 12 No TECU Operation: Bad Intelligent Device

Eaton Gen 1 (AutoShift) Fault Code: 83 PID: SID 18 FMI: 14 Shift Lever Missing

Eaton Gen 1 (AutoShift) Fault Code: 74 PID: SID 54 FMI: 7 Failed To Sync Initial Engagement

Eaton Gen 1 (AutoShift) Fault Code: 73 PID: SID 58 FMI: 7 Failed To Engage Gear

Eaton Gen 1 (AutoShift) Fault Code: 72 PID: SID 59 FMI: 7 Failed To Select Rail

Eaton Gen 1 (AutoShift) Fault Code: 71 PID: SID 60 FMI: 7 Stuck Engaged

WARNING!