Eaton Fuller Advantage (2017) Fault Code: 94 PID: TBH SPN: FMI: 12 Electronic Clutch Actuator Gen2 ECA: Bad Intelligent Device
Overview:
The Fuller Advantage transmission equipped with an Electronic Clutch Actuator (ECA) that controls the position of the clutch assembly. Power and ground to the ECA are OEM-supplied through a 2-Way Connector directly connected to the vehicle batteries. The ECA is connected to the TECU by an 8-Way Connector that is part of the transmission harness. The ECA communicates with the TECU over the High Integrity Link (HIL) to change position, show faults or include other operation information. Fault Code 94 indicates that a failure has been detected by the ECA, but is specific to systems that use a Gen2 ECA. Troubleshooting for this procedure is specific to the Gen2 ECA and associated harnesses.
Note: The troubleshooting procedure for Fault Code 64 may direct users to use this troubleshooting procedure if the vehicle is equipped with a Gen2 ECA, even if Fault Code 94 was not set by the transmission. This is because some transmission software versions do not set Fault Code 94.
Detection:
The TECU monitors the ECA for excessive motor current, excessive motor temperature, incorrect motor position, improper battery or ignition voltage to the ECA, or various internal ECA malfunctions.
Conditions to Set Fault Code Active:
FMI 12 – Bad Intelligent Device: ECA detects an internal
failure for 1 second or longer.
Fallback:
All FMIs
• “F” flashes in gear display.
• Service light flashes (if equipped).
• If the fault occurs at power up, engine cranks and starts, but TECU will not engage a gear.
• If the fault occurs while driving, ECA maintains current clutch position or moves to the last position commanded by the TECU. Transmission may continue to shift until vehicle is stopped.
Conditions to Set Fault Code Inactive:
FMI 12: No internal ECA failures are detected for 2 seconds.
Possible Causes:
FMI 2, 12
1) ECA Power Harness
– Bent, spread, corroded or loose terminals
– Wiring shorted to ground, shorted to power or open
2) ECA
– Internal failure
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