What happens to the solenoid on a torque converter?
When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to disengage. This lets the torque converter lock in “gear” or unlock out of “gear.”
Where to check 12 volts on GM solenoid?
Check for 12 volts to terminal A at the transmission Assembly Line Diagnostic Link (ALDL) as described at the beginning of the Regular Method, above. Most quick methods of testing can be done at the ALDL, which is the plug interface that your factory-like diagnostic tool plugs into.
Can a bad solenoid cause a bad ECM?
Generally, if you unplug the TCC solenoid at the transmission and the symptoms go away, you have found the problem. Sometimes this can be misleading, because you don’t know for sure if the cause is a bad solenoid, dirt in the valve body, or a bad signal from the ECM.
What happens if I remove the wire to the TCC solenoid?
You just lose the lock up torque converter function which will reduce fuel mileage. If the TCC solenoid is sticking causing the engine to stall at idle, you might try this. Purchase a can of SeaFoam TransTune and add a half a can to the transmission fluid.
When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to disengage. This lets the torque converter lock in “gear” or unlock out of “gear.”
Where is the lock up solenoid on a trans?
The trans are built to handle the stop and go so turning it off is not a problem. DO NOT just disconnect it and leave it at that. The Lockup solenoid is under the side cover. Sometimes the engine cradle needs to be lowered to get the side pan off. The solenoid is around $50.
Generally, if you unplug the TCC solenoid at the transmission and the symptoms go away, you have found the problem. Sometimes this can be misleading, because you don’t know for sure if the cause is a bad solenoid, dirt in the valve body, or a bad signal from the ECM.
What causes the torque convertor clutch to disengage?
There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC.
What causes the torque converter to lock in gear?
When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC. When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to disengage. This lets the torque converter lock in “gear” or unlock out of “gear.”
What causes a bad torque converter on a Cadillac DeVille?
Bad Torque Converter Clutch – The clutch itself can go bad, just like a manual transmission. The good news is that when this clutch goes out the transmission will still take you to where you need to go. Even if it does so at a slightly higher RPM. Short in the TCC – A short in the wiring going from the TCC to the TCM can cause the P0741.
What is the OBDII code on a Cadillac DeVille?
It is purely a transmission related code. Although, the engine response may “feel” different without the torque converter locking.
What does the p0741 code on a Cadillac DeVille mean?
P0741 Cadillac DeVille. P0741 is a very common trouble code. It’s know to affect the Cadillac DeVille quite often. Here’s what it means: The DeVille uses a clutch in the torque converter to lock the engine and transmission together at highway speed.