03 toyota rav4 p0770 - Transmission Problems


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03 toyota rav4 p0770

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Auto Repair Home>> Automotive Repair>> Transmission Problems

kensoncustom
User

Feb 12, 2014, 7:56 PM

Post #1 of 3 (2700 views)

03 toyota rav4 p0770	Sign In

hello guys .i have 03 toyota rav 4 origonally started with multible trans codes took car to dealership new TCM flashed car worked great!under warenty 150000 mi this car has 154000 crap now we have a p0770 sol E replaced TCC loc-up sol worked great! can drive car 30 40 50 mi after car sets drive next day code comes back
50 MPH when calls for loc-up ANY IDEAS

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Feb 12, 2014, 8:39 PM

Post #2 of 3 (2686 views)

Re: 03 toyota rav4 p0770	Sign In

Put an amp clamp on the DSL electrical circuit and monitor current in the circuit when the PCM commands the DSL solenoid to energize.
At the same time using a scan tool monitor the engine rpm and turbine speed sensor to see if lock up occurs and lockup disengages. It would also be wise to use a scope and capture the turbine speed sensor waveform to be sure you don't have any anomalies when the problem is occurring.

If the PCM commands and you see current flowing in the DSL circuit, but you have excessive slip speed during lock up or if the PCM drops command and you see no current flow, but you have no slip speed after disengagment, remove the upper valve body and check for valving issues. If no issues are found, replace the torque converter.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 12, 2014, 9:13 PM)

kensoncustom
User

Feb 14, 2014, 11:42 AM

Post #3 of 3 (2644 views)

Re: 03 toyota rav4 p0770	Sign In

thanks for your info.I did find out that sonnax
makes a valve body kit U140E-U241E-ZIP
this kit contains a tcc valve and fixes other
presure related problems.i will let u know how
what happens.

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