Advanced Diagnostics

DTC P0757: Shift Solenoid Valve B Stuck ON







General Description
Shift solenoid valve B is installed in the transmission housing. It is controlled by the ON/ OFF signal from the powertrain control module (PCM) to apply line pressure to shift valve B. The signal from the PCM is output to apply clutch pressure control pressure to the proper gear change clutch according to the gear change schedule. When the signal to shift solenoid valve B from the PCM is ON, and line pressure is discharged, shift valve B is inactive. When the signal to shift solenoid valve B from the PCM is OFF, and line pressure is applied to shift valve B, it operates against the shift valve B spring. When the wrong gear ratio is output for a given speed change mode, or when the wrong transmission fluid pressure switch is turned-on, a shift solenoid valve turn-on malfunction is detected and a DTC is stored.




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




Enable Conditions

Malfunction Threshold
one of these conditions occurs:

- The 2nd clutch transmission fluid switch is ON against the 3rd -> 4th gear upshift command for at least 11 seconds.
- After the 3rd -> 4th gear upshift command is output, it is neutral for 2 seconds or more when the 5th gear shift command is output, though there is no history of being neutral.

Driving Pattern
Start the engine, and accelerate the vehicle until the transmission shifts into 5th gear in the D position.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the PCM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

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