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Ive found a 99 in excellent shape with 125k miles. The only problem apparently is that it throw those 2 codes (P0715 P0763).
it also need pads and rotor but that i can do myself. tb has been done at 90k
I can get it for cheap, from what ive found the worst would be to replace the harness, then easier would be solenoid and caps in the ECU just to be safe. anything else could cause this on the ls?
The simultaneous those 2 codes generation simply means that the ECU detects unmatched speed result. The speed does not match as the ECU intended. Sometimes it is only caused by the sensor or solenoid, but sometimes caused by a broken gear or a failed clutch.
I would check the AT unit using a circuit tester and a battery and distinguish the cause of the problem. It requires some skill though.
I'm not familiar with the p0715, mabey a speed sensor. But that p0763 is shift solenoid "c" I believe, if that's bad you definitely want to replace it. I had p0770 for shift solenoid e, I replaced it and everything is fine no codes. Your car is really low mileage for a solenoid to be going out, mines failed at 176k after i put half a quart of castrol atf in my transmission, so I hope you're using Toyota type 4 atf.
Could bad cap in the ECU alone cause this? If the car run/shift fine (apparently), there's more chance that's only the speed sensor?
As far as I have experienced, when capacitors are failed, models 98-00 show other ECU failure modes first. If you want to quickly check it, measure the ripple level at the DIAG connector. You can find the method at the FAQ.
In order to find the root cause, I have an idea which can be done without any equipment. Simply drive the car using a manual shift mode after resetting the ECU. Does the engine check light turn on at certain gear range?
Or does it turn on at any condition?
Idk, I need to go test drive the car. It's a 2 hours drive from my place.
The "owner" is saying that the only problem he noticed is that it feel like it slip (less than 3 sec) between 2nd and 3rd gear under heavy acceleration.
The guy is selling the car for his cousin that is currently working in Saudi Arabia, so it's complicated. We need to find the right way for the transfer of ownership up here in Quebec.
Idk, I need to go test drive the car. It's a 2 hours drive from my place.
The "owner" is saying that the only problem he noticed is that it feel like it slip (less than 3 sec) between 2nd and 3rd gear under heavy acceleration.
The guy is selling the car for his cousin that is currently working in Saudi Arabia, so it's complicated. We need to find the right way for the transfer of ownership up here in Quebec.
Then why do you ask people here to fix?
Are you going to help them?
Sorry if I wasn't clear, I'm looking to buy it. Depending on the possible problems I might try to get them to lower their price if it need a tranny
Now I understand the situation. Without accessing the car, it is hard for you to find the root cause.
According to my experience, models 98-00 tend to show a symptom below when aged.
The ECU capacitors increase the ESR and the ripple level becomes bigger. At that stage, one of the initial failure modes is the strange AT shift. But it does not generate any error code and many owners don't notice the problem until capacitors are changed. They say that the AT shifts better and also the car runs better.
The processors for 98-00 models consume less power compared with models up to 97 and the ECU capacitors are not stressed too much. But those capacitors contain quaternary ammonium salt inside and still dangerous to use for long time.
1999 LS400 currently 260K miles. A little over a year ago I started having intermittent P0763, it would go away on it own after sitting overnight. Lately its been ON all the time, doesn't go away and P0715 came along too.
I got an OEM solenoid, hope changing it will solve the problem.
1999 LS400 262K mi
Finally got around to open the transmission pan and change Solenoid to fix P0763. (I changed second solenoid from right with yellow wire going to it).
Noticed that one solenoid (SLU?) shifts/moved a bit back and forth while the rest are fixed.
Is that normal?
I am pointing to the solenoid from Driver side, left side of picture is toward the front of the car.
1999 LS400 262K mi
I had Check Engine Light light for a while. P0763 - (OBD II said Shift Solenoid C )
It was first intermittent, then stayed ON all the time.
Changed 3way solenoid 2 ( part 35230-30010) and the Check Engine Lights is gone! Shifts very smooth and silky, something I have been missing for a while
02-24-15, 04:13 PM
99 with P0715 P0763
