Overview:
The Fuller Advantage Transmission is equipped with a Heavy Duty Electronic Clutch Actuator (ECA) Clutch. The Transmission Electronic Control Unit (TECU) monitors engine speed and Input Shaft Speed Sensor values to calculate clutch slip. Fault Code 26 indicates that a clutch slip event has occurred.

Detection:
The TECU calculates a significant variance between the engine speed and Input Shaft Speed Sensor values.

Conditions to Set Fault Code Active:
FMI 10 – Abnormal Rate of Change: The TECU monitors and compares both Input Shaft Speed and engine speed. If the TECU calculates that engine speed is greater than Input Shaft Speed by over 150 RPM and remains at 50 RPM or higher for 1.3 seconds.

Fallback:
FMI 10
• “F” flashes in gear display.
• Service light flashes (if equipped).
• During a slip event the engine torque will be decreased.

Conditions to Set Fault Code Inactive:
FMI 10: Ignition key is turned off and TECU is powered down.

Possible Causes:
FMI 10
1) Clutch
– Excessive release bearing greasing
– Contamination from oil leaks
– Wear or damage
– Damage due to excessive abuse
– Clutch adjustment mechanism not functioning properly.
– Clutch worn out
2) OEM Engine
– Intermittent loss of engine speed over the J1939 data link