Shift Solenoids

Shift Solenoids


Which solenoids are "ON" when this vehicle is shifted into Drive and starts out in the first gear?
1st -2nd and 2nd - 3rd gear



Which solenoids are "ON" when this vehicle automatically shifts into second gear?
2nd and 3rd gear


Which solenoids are "ON" when this vehicle automatically shifts into third gear?
None


Which solenoids are "ON" when this vehicle automatically shifts into fourth gear?
1st and 2nd gear



Shift Solenoid Malfunction: Describe what would happen if none of the solenoids came "ON". Could the vehicle drive? What gear would it be in? How fast could the vehicle go? Could it have the Power to climb a hill?
According to the vehicle if all the solenoids were off then the only available gear on the vehicle would be 3rd gear to be used. This is because the 3rd gear does not need any solenoids to be "on" therefore the vehicle will be slow during the intial start and can only use 3rd gear. The vehicle would drive up the hill only if the vehicle is on running start.


Codes: Pick two transmission codes out of repair information, and describe what the code means and what malfunction would cause the code:


Code: LR solenoid Valve Open
This is open because the cable is unplugged


Code: O/D Solenoid Valve Open
This is open due to the cable is unplugged and car is in the 3rd gear.



Diagnosis


For each code listed above, discuss what tests you culd run to diagnose the problem:


1st Problem Testing:
With the vehicle stuck in 3rd gear, we tried shifting the car into different gear but because all the solenoid valves were stuck open and would not close therfore the vehicle would not shift and remains in the 3rd gear.



2nd Problem Testing:
During the 2nd test we plugged the cables back into the transmission and started the car and then we were able to change the gears up and down. I then used the scan tool to check if the valves were closing or not when we changed the gears and it did.