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97 Avalon Xl Rough Idle Under Load

04-30-2007, 01:25 PM
My avalon is having some rough idle problems under load. if I shift to neutral the problem stops. i also have a 773 error code which is for the shift solenoid. would this need to be replaced to solve the problem or is there a simpler answer?

05-01-2007, 11:18 AM
Your shift valve solenoid is getting bad signals either too high or too low in amperage. The ECM has turned the shift solenoid valve off since it senses a malfuntion. This causes the roughness when engaging the trans because the lock up converter is controlled by this.
You can test the ECM terminals.
You can remove, clean and check the plug to the transaxle.
You can drop the transmission pan and check the solenoid connector and the solenoid valve.
You can get your wallet out and go to a dealer.

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