P0761

DTC P0761 Shift solenoid C system (function/stuck OFF)
DTC P0762 Shift solenoid C system (stuck ON)
DTC P0781 1-2 shift valve system

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 S3.
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





TYPICAL MALFUNCTION THRESHOLDS
P0761: Shift solenoid 3 (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)





When both of the following conditions are established: condition (E) or (F)

Condition (E)





Condition (F)





P0762: Shift solenoid 3 (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)





P0781: 1-2 shift valve (spring compression)
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 (S3) is stuck OFF (Select lever in M position)





Gear position when the transmission 3 way solenoid ASSY (S3) is stuck ON (Select lever in M position)