Shift solenoid replacement instructions

Tiny
TCNG889
  • MEMBER
  • 2003 TOYOTA COROLLA
  • 4 CYL
  • AUTOMATIC
  • 167,000 MILES
I just took my car for a smog check and it failed coz the engine light was on and it was giving the code P0770. I was told it may have something to do with the transmission. I don't see anything wrong with my transmission, but I took it to the mechanic anyway to be sure and they confirmed nothing is wrong with my transmission. So why is my engine light still on then? Does anyone has any idea what else it could be? The light is off after I took it to the mechanic, but it will come back on as soon as I drive off. Please help.
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Wednesday, February 16th, 2011 AT 3:35 PM

10 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This is not a mechanical issue so you may not see anything wrong with the way it drives but it is an issue with the shift solenoid circuit or the solenoid itself. So as soon as you drive it sees the issue and turns the light on.

I attached all the testing that we need to do in order to confirm what this issue is.

Here is a guide that talks about the different types of transmission issues:

https://www.2carpros.com/articles/automatic-transmission-problems

Lets run through this material and see what we find. Thanks
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Friday, December 4th, 2020 AT 11:56 AM
Tiny
LAWRENCEBUI
  • MEMBER
  • 1 POST
  • 2003 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • AUTOMATIC
My question is would you show or me where is the Shift Solenoid E ( Shift solenoid SL ) location in the transmission please. I called dealer but he's still does not knows which one is E. And how can I check for bad CAT. Thank you so much.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
There's no way for you to test the converter. That's what the computer is programmed to do for you.

The shift solenoids are mounted on the side of the transmission and I believe they may all be packaged together as one part.

https://www.2carpros.com/images/external/104385505.jpg.gif
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
DOWNTOWN789
  • MEMBER
  • 1 POST
  • 2001 TOYOTA COROLLA
My car shows P0770 code. I replaced transmission fluid at 71500 miles. I had the code before oil replacement. My tech. Told me to change the oil and clear the code, use it for a while and if it comes back, we need to open the tranny, and change few items, which may cost from 500 to 1200, depends. I drove for almost 1500 miles. And at 73000 miles, the code came back again. So please advice me, the best solution to get rid of the engine light.I am not interested in spending 1000 bucks for the same.

Also, I have to hit too much gas to get speed, when stop at a intersection or junction, which was not a problem before. The engine sounds too bad and noisy.

Will engine and transmission flush and oil/filter change will help me to get rid off the code and get back the speedy and smooth ride.

Need ur suggestions/advice to get the speed back and get rid of the code forever.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
This code is a lockup solenoid malfunction, also called the TCC. After car has shifted into high, at a designated speed, the lockup solenoid will engage, reducing RPM and saving gas. In your case it sounds like the lockup solenoid is not disengaging, causing the engine to stall, run rough. It is sort of like starting in second gear (on manual trans) from a start. You can try changing fluid again, but the final fix will be to replace solenoid. Shop around for a better price, but a malfunctioning solenoid will not fix itself.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,468 POSTS
Hello,

You will need to drop the pan which this guide will give you an idea on.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here is the wiring diagrams so you can see its the solenoid with the yellow wire is the one you want to replace.

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
BOOBE99
  • MEMBER
  • 2 POSTS
  • 1993 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 153,000 MILES
Transmission has and engine trouble code of 63 no.2 solenoid valve and code 64 SL solenoid valve code. How can I fixes theses codes.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
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Both are transmission trouble codes and diagnostic procedures are as follows.

CODE NO. 63 (NO. 2 SOLENOID)

1. Access ECT ECU. See Fig. 1 & Fig. 2. Using ohmmeter, check resistance between terminal S2 and body ground with connector removed from ECT ECU. See Fig. 22.

2. Resistance should be 11-15 ohms. If resistance is okay, replace ECT ECU. If resistance is not within specification, remove oil pan. Disconnect electrical connector (Pink/Green wire on Paseo, Black wire on all others) at No. 2 solenoid.

3. Check resistance between electrical terminal on No. 2 solenoid and body ground. Replace No. 2 solenoid if resistance is not 11-15 ohms. If resistance is 11-15 ohms, inspect and repair wiring between No. 2 solenoid and ECT ECU.

CODE NO. 64 (LOCK-UP SOLENOID)
NOTE: Lock-up solenoid terminal SL, may also be known as solenoid No. 3 (SOL 3) terminal.

1. Access ECT ECU. See Fig. 1 & Fig. 2. Using ohmmeter, check resistance between terminal SL and body ground with connector removed from ECT ECU. See Fig. 27.

2. Resistance should be 11-15 ohms. If resistance is okay, replace ECT ECU. If resistance is not within specification, disconnect electrical connector at lock-up solenoid.

3. Check resistance between electrical terminal on lock-up solenoid and body ground. Replace lock-up solenoid if resistance is not 11-15 ohms. If resistance is 11-15 ohms, inspect and repair wiring between lock-up solenoid and ECT ECU.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
BOOBE99
  • MEMBER
  • 2 POSTS
Could you provide detailed instructions on how to access the no.2 and SL solenoid.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
To access the solenoids, you would have to remove the valve body which means dropping the oil pan.

Check the solenoids connectors at transmission case for contaminations and poor contact first. Water tends to collect at the connectors resulting in poor contact.

SHIFT SOLENOIDS R & I
Removal & Installation
Solenoids are located on the valve body. Remove bolt, solenoid and "O" ring from valve body. To install, reverse removal procedure using NEW "O" ring.
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Wednesday, May 26th, 2021 AT 6:46 PM (Merged)

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