Hesitates while accelerating

2004 TOYOTA CAMRY
105,432 MILES • 4 CYL • 2WD • AUTOMATIC
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BLESSING EWOBOR
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Hi, the vehicle hesitate while accelerating. I scanned the vehicle, the only code found was P0778 (pressure control solenoid B). I drained out the transmission oil and loosen all the necessary bolts for me to access the solenoids. The oil was smelling like burnt oil. I removed the connector to the solenoid and tested each of the solenoid using battery (I don't know the exact solenoid), they seems to function well mechanically (coming in and out). I fasten all the loosen bolts, replaced the transmission oil and test drive the vehicle but there was no improvement, the problem persist, LoL. What else could I do?
The way I tested the solenoid, is it the best way to tested?
Dec 6, 2020 at 6:35 PM
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DANNY L
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Hello, I'm Danny.

Here are repair guides to properly test the entire system relating to the code P0778. Just applying voltage to the solenoid doesn't ensure that is the problem. Those solenoids are controlled by the ECM- engine control module as well. I've attached the picture diagnostic steps below for your car. Hope this helps and thanks for using 2CarPros.
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Dec 6, 2020 at 7:30 PM
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BLESSING EWOBOR
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Thank you.
Dec 7, 2020 at 3:46 PM
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DANNY L
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You're welcome.
Keep us updated as to what you find. Thanks again for using 2CarPros.

Danny-
Dec 8, 2020 at 2:06 AM
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BLESSING EWOBOR
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Good morning sir
Could I get a chart on the Time the solenoid should respond (open or close) with the engine speed?
Aug 5, 2021 at 12:34 AM
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DANNY L
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Hello again.

Unfortunately, we don't have that type of a reference in our guides. That would be information that only Toyota or the transmission manufacturer could provide. Sorry. Hope this helps and thanks again for using 2CarPros.
Aug 6, 2021 at 12:15 AM
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BLESSING EWOBOR
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Okay sir, that you very much.
Aug 6, 2021 at 6:21 PM
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DANNY L
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Hello again.

Were the diagnostic steps posted prior able to help? Thanks again for using 2CarPros.

Danny-
Aug 6, 2021 at 7:14 PM
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BLESSING EWOBOR
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Yes, thank you sir.
Aug 6, 2021 at 7:49 PM
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DANNY L
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You're welcome!

Thanks again for using 2CarPros and we hope you will use our site again in the future when needed.

Danny-
Aug 6, 2021 at 10:14 PM
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BLESSING EWOBOR
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Good morning, sir, please could I get road test parameters.
Sep 28, 2021 at 6:27 PM
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JACOBANDNICKOLAS
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Hi,

I noticed it has been a couple of days since you've been contacted. Let me know what parameters you are looking for and I'll try to get them for you.

Let me know.

Joe
Sep 30, 2021 at 7:37 PM
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BLESSING EWOBOR
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Good morning, sir. I mean road test rest on the transmission indicating the speed at which the transmission has to shift into different gears.
Oct 1, 2021 at 7:14 PM
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JACOBANDNICKOLAS
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Hi,

I don't ever remember seeing something that provides a speed for an automatic to shift. There are many variables that cause it to shift at different speeds.

I will ask the site owner to see if he has heard of one.

Joe
Oct 2, 2021 at 6:24 PM
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BLESSING EWOBOR
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Good evening, sir. maybe you don't understand what I asked.
Procedures for road test.
Oct 2, 2021 at 7:34 PM
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JACOBANDNICKOLAS
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Hi,

Take a look below and let me know if that is what you needed.

Take care,

Joe
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Oct 3, 2021 at 5:09 PM
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BLESSING EWOBOR
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Good morning, sir. I have disturbed a lot as rat these days, I sincerely apologize for that sir.
Thank you, sir.
Sir, if you refer to the first diagram it was saying something like automatic shift schedule. I don't know if you have that sir.
Oct 3, 2021 at 6:01 PM
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BLESSING EWOBOR
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Sir, is the transmission 3 gear speed, 4 or 5?
Oct 3, 2021 at 6:31 PM
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JACOBANDNICKOLAS
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Hi,

I'm sorry. I don't have the shift schedule. I never remember seeing one in the past. As far as the transmission, it is a U241E, a 4-speed automatic transmission.

If you look at the attachment below, that is the only reference I have for shift points/schedules.

Let me know if you have other questions.

Take care,

Joe

See pic below.
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Oct 4, 2021 at 6:10 PM