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Home >> Subaru >> 2023 >> WRX Base, Standard Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Continuously Variable Transmission (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1758: Cold Start Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On >> General Description >> Diagnostic Method
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Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Malfunction counter/Diagnostic execution counter 70% or more
When the difference between Engine speed and Turbine shaft speed count up Malfunction counter Less than 50 rpm

Time needed for diagnosis:  Cumulative time of 3 s during the lock-up prohibition at cold

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.