Pinpoint Tests - OSC Equipped Vehicles: P0657: Testing
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Power to all solenoids has been interrupted. Monitor PID tspc_flg. If tspc_flg = 1, then TSPC is on. If tspc_flg = 0, then TSPC is off. Check for opens, shorts to ground or disconnected harness. Repair as required. When TSPC is commanded OFF as a FMEM action, check all solenoids for correct function as listed in the band, clutch, solenoid, switch application charts. For additional information on diagnosing PCM concerns, refer to the appropriate INTRODUCTION article.