Eaton Gen 1 (AutoShift) Fault Code: 44 PID: PID 54 FMI: 4 Interia Brake Solenoid Coil

Posted by PerDiezel Solutions on May 12, 2026

Overview:
This code indicates an electrical problem in the interia brake.

Detection:
Starting at key-on and throughout operation, the Transmission Controller constantly measures this circuit. A failure mode of a short to battery, short to ground, or open circuit is detected.

Fallback:
There is no fallback associated with this failure. However, it may be difficult to perform an initial engagement due to a poorly adjusted clutch. Also, hill shifting performance may be reduced.

Required Tools:
1) Basic Hand Tools
2) Digital Volt/Ohm Meter
3) AutoSelect/AutoShift Troubleshooting Guide

Possible Causes:
1) Relay coil open or shorted
2) Damaged transmission harness
3) Malfunctioning transmission ECU

Eaton Gen 1 (AutoShift) Fault Code: 44 PID: PID 54 FMI: 3 Interia Brake Solenoid Coil

Eaton Gen 1 (AutoShift) Fault Code: 43 PID: SID 36 FMI: 5 Range Solenoid Valve

Eaton Gen 1 (AutoShift) Fault Code: 43 PID: SID 36 FMI: 4 Range Solenoid Valve

Eaton Gen 1 (AutoShift) Fault Code: 43 PID: SID 36 FMI: 3 Range Solenoid Valve

Eaton Gen 1 (AutoShift) Fault Code: 43 PID: SID 35 FMI: 5 Range Solenoid Valve

Eaton Gen 1 (AutoShift) Fault Code: 43 PID: SID 35 FMI: 4 Range Solenoid Valve

WARNING!