Circuit Description
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 1-2 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 P0752 sets under these conditions:
A stuck ON 1-2 SS Valve, or
a stuck ON 1-2 Shift Valve.
When the TCM detects an actual gear ratio that does not agree with the commanded
gear, 1st gear ratio in 2nd and 4th gear ratio in 3rd, then DTC P0752 sets.
Conditions for Setting the DTC
| • | Gear range is D4, D3, D2 or D1 |
| • | TP Angle is greater than 8% |
| • | Engine Torque is greater then 10 ft-lbs |
| • | Trans. Fluid Temp. is between 21 and 130°C (68 and 266°F) |
| • | Vehicle Speed is greater than 8 km/h (5 mph) |
| • | No TP Angle DTCs have set |
DTC P0752 is a type B DTC.
Diagnostic Aids
| • | 1-2 shift solenoid valve - stuck On. |
| • | 1-2 shift valve - solenoid is leaking - stuck On. |
