The 1-2 shift solenoid valve (1-2 SS Valve) is a normally open exhaust valve
that in conjunction with the 2-3 shift solenoid valve (2-3 SS Valve), allows four
different shifting combinations. The 2-3 SS Valve is attached to the control valve
body, within the transaxle. The TCM monitors the actual gear ratio and compares the
actual gear ratio with the commanded gear ratio. DTC P0757 sets under these conditions:
A stuck OFF 2-3 SS Valve, or
a stuck OFF 2-3 Shift Valve.
When the TCM detects an actual gear ratio that does not agree with the commanded
gear, 2nd gear ratio in 3rd and 1st gear ratio in 4th then DTC P0757 sets.
DTC Parameters
| • | Gear range is D4, D3, D2 or D1 |
| • | TP angle is greater than 8% |
| • | Vehicle speed greater than 8 km/h (5 mph) |
| • | TFT between 21°C (70°F) and 130°C (266°F) |
| • | Engine torque greater than 10 ft-lbs |
| • | No engine torque, ISS, OSS, shift solenoid electrical, TFP or TP sensor
DTCs have been set. |
DTC P0757 is a type A DTC.
Diagnostic Aids
| • | The 2-3 shift solenoid valve is stuck off. |
| • | The solenoid is leaking. |
| • | 2-3 shift valve - stuck in downshifted position |
