Eaton Gen 1 (AutoShift) Fault Code: 46 PID: SID 38 FMI: 4 Splitter Solenoid Valve

Overview:
This code indicates an electrical failure of the solenoids that control the splitter.

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

Fallback:
This fault causes a 9-speed fallback and the transmission stays in either LO split or HI split.

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

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