Circuit Description

The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

Fig 1: DTC P2769 & P2770 Detection Condition & Trouble Area Chart

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Fail-safe function

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