1996 4Runner V6 4x4 auto, manual transfer case

P0753=shift solenoid A circuit malfunction



For those of you that have experienced this code, what is the most common problem and fix? What wires, connectors, etc. should I be checking? I assume that it may not be the solenoid itself since it's not throwing the solenoid malfunction code?

 

I am gonna go way out on a limb and say you need to replace

shift solenoid A


but hey I am crazy like that

 

According to the codes, there is a seperate code that lists a solenoid malfunction, this code I have is supposed to be an electrical problem between the solenoid and ecu.

 

get the toyota service manual for the transmission it is only 10 bucks

pop the pan, unplug the solenoid, unenergized resistance 11-15 ohms means good valve.

 

I have this same code now. 1996 4Runner
Is there any news on what it was for you?

 

Solenoid in transmission-had been that way for a while I guess b/c the trans. started slipping. I bought a used trans. and now the code is no more.

 

you had to buy a complete transmission? Can't I just buy a new solenoid?

 

he took the deterministic route. it was slipping. $$$$

replace tranny, no mystery, no worries...fixed.

 

Yep, basically thats it-it was slipping and after that I found a used 75k mile trans. and the price was right so I bought that and moved on. Had it not been slipping then I would have tried replacing just the solenoid.

This was on a 4Runner that I just bought, so I didn't know the entire history of the trans. or vehicle so replacing the trans. was also playing it safe since I didn't know the history.

 

WOW, thanks for clearing that up. My transmission seems to be fine and it scared me in the thought that I would have to replace the whole transmission.

 

double posted for some reason,

 

I've dealt with several vehicles (diff makes and models) and when ever a computer throws a solenoid XYZ circuit malfunction its pretty much always the solenoid is bad or going bad.

The computer checks resistance via current draw and if its less or more than what the solenoid is supposed to pull it will throw the code.

The only other reason the computer would see a change in resistance would be a chaffed wiring harnesses that grounding out. Any Toyota does really good jobs with their harnesses so Its gonna be that solenoid.

I would drop the pan and spend the 80$ and go ahead and replace it before it causes sever damage.

Because if the coil gets weak and you going down the highway and it decides to start dropping in and out/fluttering its going to cause severe damage QUICK.

 

Is there any way to know what solenoid it is? The code says A, so does that mean that I need to replace solenoid 1 or is that just part of the code to tell me what is failing.

Can a at home mechanic do this? Dropping a transmission pan is not a big deal and keeping track of what bolts go where seems pretty straight forward, but I have been told on another local forum that a regular home mechanic is not able to do this correctly.

 

yeah you can do it at home. what does 'regular home mechanic mean' anyway ?


haz you a brain you can haz tranny maintenance at home.

 

If you can change a set of spark plugs or valve cover gasket you can swap out a solenoid in the transmission. There is a document in .pdf out there on the net that is a TSB from Toyota that identifies which solenoid is which inside the transmission. I'll see if I can find a copy of it later today

 

I was told on another forum that the error code that I got, "P0753 Shift Solenoid A" is for #2 solenoid not number 1 like I thought. 1 and 2 have the same part number but how do I check what one is bad?

i have tried searching for a 1996 4Runner TSB but have not found anything. I do have a repair manual though.

 

Get a OHM meter and check the resistance of each of the solenoids. Any solenoid that does not test to spec (high or low ohms) replace.

 

Information that I have found searching:

2 Solenoids - (#1 & #2) same part number: 85420-21090
1 Solenoid - (#3) More expensive part: 35250-50030

mt_goat, a very knowledgeable user here found all these links to information on how to diagnose and fix this:
https://www.yotatech.com/forums/f2/4...ocation-137360 - Original post
http://members.cox.net/mgriese5/Level10.html - Write up on how to remove the solenoids
http://www.ncttora.com/fsm/index.html - Manuel's on Toyota's that can be downloaded

 

Is there any opinion on the best trans fluid to use?

 

If money isn't a concern go with Mobile One synthetic transmission fluid. Otherwise just run with a good name brand like Valvoline trans fluid and change every 30K miles