Problem: The tech noticed that the fluid
pressure switch “E” PID was reading “OFF” in all gear selections.
It should read “ON” in Reverse, Neutral, 4th and 5th. It should
read “OFF” in gears 1, 2, and 3. Shift solenoid “E” was being
commanded “ON” and “OFF” properly at the ORN/WHT wire of the
transmission connector (C175), which confirmed that either the
pressure switch was bad or there was no pressure reaching the
pressure switch through the valve body.
Details: The tech dropped the pan and removed
the Pressure Switch Manifold, leaving the harness hooked up along
with the scan tool. Using a pencil eraser to press on the
diaphragm of pressure switch “E,” scan tool data confirmed that
the switch could be activated from “ON” to “OFF” consistently.
That confirmed that the switch, wiring and module were all
functioning properly. The tech also checked the shift solenoid
and it clicked every time with power and ground applied. The tech
then removed the valve body and found shift valve “E” was
sticking in its bore.
Confirmed Repair: The valve body was sublet to a
transmission shop to be rebuilt. The rebuilt valve body was
installed and the transmission shifting problem was resolved.