Either way it'll set codes for circuit and performance if you do either of these. An electric current in the coil should cause the solenoid to open, causing a flow of hydraulic fluid. I am guessing the electronics that control this probably check for some current flow, so the switch may actually need to switch between the actual coil in the transmission and a resistor. This should result in the vehicle using 4th gear without the lockup converter. If your not up to that, take it in to get it fixed. Is the solenoid connected to +12 V and then the other end is grounded by the computer? If your inclinded to attempt to fix this yourself, I have some trouble shooting proceedures that you can use. The vehicle has a transmission fluid cooler, so I don't think the additional heat is going to be an issue.
Is there any reason why I can't just wire a switch somewhere in the transmission harness that allows me to interrupt the current to the solenoid? To get to it you have to remove the tranmission oil pan. The worst part is getting the park rod to go back in the right place. From what I understand, the torque converter clutch is actuated by hydraulic fluid. The park rod will be coming out from the back so you have to bring valve body forward. Or is the wiring the opposite? But do you need to replace it? To determine that you have to figure out if it is the wiring that goes to the solenoid or if the solenoid itself is shot. Remove kick down lever and shift lever. My only conclusion is my vehicle's torque converter clutch no longer can actually lockup.
In another post, I mentioned that when I am trying to cruise I get a massive stuttering from my drivetrain. This hydraulic fluid is controlled by a solenoid valve. You have to drop the trans pan and valve body to change this. Replace solenoid and reverse procedure. I'd like to disable it. . P0753 Shift Solenoid A Electrical P0758 Shift Solenoid B Electrical Good luck and hope this helps Apr 20, 2009.
The Powertrain control module commands solenoid on or off by applying or removing the ground. Changing it should be no problem. Check to make sure there is no corrosion in the connector Jun 25, 2010 code - po1860 tcc pwm solenoid circuit malfunction 4t80- E conditions. I'd avoid cutting into the harness if you can. P0740 Torque Converter Clutch Circuit Malfunction Driving the vehicle with this problem and not attending to it asap may cause further damage.
It comes on a bracket with the lock-up solenoid and some wiring. The Solenoid is attached to the transmission valve body. They are very involved, and could require the trans oil pan to be removed to get access to the solenoid. . . .
. . . . .
. . . . . .
. . . . .