P0757

DTC P0756 Shift solenoid B system (function/stuck OFF)
DTC P0757 Shift solenoid B system (stuck ON)

Circuit description

The transmission control computer ASSY detects the gear position based on signals from the transmission revolution sensor (NT) and the transmission revolution sensor (SP2). Then, the transmission control computer ASSY detects mechanical problems of related solenoid valve, valve body, or automatic transmission when the detected gear position differs from the commanded position.





Monitor description

This diagnostic code indicates "stuck ON" or "stuck OFF" of the shift solenoid valve S2.
TCM switches ON/OFF of the shift solenoid valve to command shifting. If the gear position commanded by TCM is different from the actual gear position, TCM turns on MIL and records the diagnostic code.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS
The following items are common to the all conditions below.





TYPICAL MALFUNCTION THRESHOLDS
P0756: Shift solenoid 2 (stuck OFF)
Compare the target gear specified by TCM and the gear ratio calculated from turbine shaft speed and vehicle speed.
When both of the following conditions are established: condition (A) and (B)

Condition (A)





Condition (B)





When both of the following conditions are established: condition (C) or (D)

Condition (C)





Condition (D)





P0757: Shift solenoid 2 (stuck ON)
Compare the target gear specified by TCM and the gear ratio calculated from turbine shaft speed and vehicle speed.
When both of the following conditions are established: condition (A) and (B)

Condition (A)





Condition (B)





When both of the following conditions are established: condition (C) or (D)

Condition (C)





Condition (D)





Circuit figure





Inspection steps

NOTE:
Gear position when the transmission 3 way solenoid ASSY (S2) is stuck OFF (Select lever in M position)





Gear position when the transmission 3 way solenoid ASSY (S2) is stuck ON (Select lever in M position)