DTC P0778: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2) [06/2014 - 08/2015]: Description

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

Shifting from 1st to 6th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR which is controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the vehicle to be operated smoothly.

Refer to FAIL-SAFE CHART [04/2013 - 08/2015]

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0778	Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)	The ECM checks for an open or short in the shift solenoid valve SL2 circuit while driving and shifting gears. (1-trip detection logic) Output signal duty equals to 100%. (NOTE: SL2 output signal duty is less than 100% under normal condition.)	Open or short in shift solenoid valve SL2 circuit Shift solenoid valve SL2 ECM	Comes on	DTC stored