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Home >> Subaru >> 2024 >> WRX Base >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Transmission (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0871: Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance >> General Description >> Execution Condition

Execution Condition

Secondary parameters Execution condition
12 V battery system voltage 10 V or more
Transmission range Drive
Vehicle speed 2.2 MPH or more
Target secondary pressure change for 0.1 second 30 kPa or less
Target secondary pressure change for 0.5 second 50 kPa or less
ABS (Target secondary pressure - Measured secondary pressure) 100 kPa or less
Target pulley ratio change for 0.1 second 0.003 or less
Target pulley ratio change for 0.5 second 0.005 or less
ABS (Target pulley ratio - Measured pulley ratio) 0.1 or less
Accelerator pedal position change for 0.1 second 3.6% or less
Accelerator pedal position change for 0.5 second 6% or less
Measured line pressure 2500 kPa or less
Actual pulley ratio 0.46 or more
and
1.5 or less
Torque converter speed ratio 0.95 or more
Duty of torque converter clutch pressure control solenoid 55% or more
Duty of shift up pressure control solenoid 50% or less
Duty of shift down pressure control solenoid 50% or less
Primary pulley shaft speed 3000 RPM or less
Above condition satisfied for 1 sec or more
*ABS: Absolute value