Advanced Diagnostics

DTC P2770: Open in Torque Converter Clutch Solenoid Valve Circuit

General Description
The torque converter clutch solenoid valve switches the hydraulic circuit to engage/disengage the torque converter clutch.

When the torque converter clutch solenoid valve is turned ON, hydraulic pressure is applied to the torque converter clutch. When the torque converter clutch solenoid valve is turned OFF, hydraulic pressure to the torque converter clutch is interrupted. The powertrain control module (PCM) commands the driver circuit to turn on the torque converter clutch solenoid valve. The circuit diagnoses malfunctions such as a circuit short or open, and sends back a return signal during the PCM's command. When the return signal does not match the PCM command, a malfunction is detected by the PCM. The malfunction is detected when the return signal does not match the PCM command to turn OFF the torque converter clutch solenoid valve, and a DTC is stored.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
The return signal does not match the command to turn OFF the torque converter clutch solenoid valve for at least 1 second.

Driving Pattern
Start the engine, and wait for at least 1 second.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.