DTC P2769: Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL); DTC P2770: Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) [11/2021 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.

By turning the shift solenoid valve SL ON or OFF, the TCM controls the fluid pressure to the lock-up relay valve, performing lock-up control.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P2769	Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other Lock-up is operating. A short in the shift solenoid valve SL circuit is detected. Malfunction status occurs 1 time or more 2-trip detection logic	Shift solenoid valve SL Transmission wire Harness and connector TCM	Comes on	DTC stored
P2770	Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other Lock-up is operating. An open in the shift solenoid valve SL circuit is detected. Malfunction status occurs 1 time or more 2-trip detection logic	Shift solenoid valve SL Transmission wire Harness and connector TCM	Comes on	DTC stored

Fail-safe function:

If the TCM detects a malfunction, it turns the shift solenoid valve SL OFF.