Eaton Fuller Advantage (2017) Fault Code: 45 PID: SPN: 787 FMI: 7 Inertia Brake Performance: Mechanical System Not Responding

Overview:
The Fuller Advantage transmission is equipped with a Low Capacity Inertia Brake (LCIB) to slow Input Shaft speed for more efficient gear engagement. As the Electronic Clutch Actuator (ECA) pulls the Heavy-Duty ECA Clutch Release Bearing back against the LCIB, the friction plates contained within the LCIB make contact with the outer plates and slow the Input Shaft down to allow smoother gear engagement. Fault Code 45 indicates the LCIB failed to reduce Input Shaft speed.

Detection:
The Transmission Electronic Control Unit (TECU) commands the ECA to open the clutch and contact the LCIB. If the TECU does not see a significant enough drop in Input Shaft speed, the fault code is set Active.

Conditions to Set Fault Code Active:
FMI 7 – Mechanical System Not Responding: During LCIB engagement Input Shaft speed deceleration is less than 1000 RPM/sec for 0.15 seconds with significant current applied to the ECA and the transmission in a non-neutral mode.

Fallback:
FMI 7
• No fallback mode associated with this fault; however, slow-to-shift or difficulty engaging start gear complaints may be presented.

Conditions to Set Fault Code Inactive:
FMI 7: Input Shaft Speed deceleration is above 1000 RPM/sec.

Possible Causes:
FMI 7
1) LCIB
– Oil leak contamination
– Excessive release bearing greasing
– Internal wear or damage
2) ECA
– Internal failure
3) ECA Clutch
– Excessive clutch drag
4) Engine
– Failed pilot bearing