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Diagnostic Trouble Code: B1257
Diagnostic Trouble Code Name: Air temperature external sensor circuit short to ground
Vehicle Make: Ford
Vehicle Model: Falcon (FG)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Clutch Pressure Control Solenoid 3 - Stuck On
Possible Sensor Faults
TCM
Possible Related Diagnostic Trouble Codes
DTC P0796 or P0797
Circuit / System Description
The clutch pressure control?(PC) solenoid?2 is integral to the control solenoid (w/body and TCM) valve assembly and has no serviceable parts. The PC solenoid?2 is a normally high-pressure control solenoid which provides fluid pressure to the 3-5-R clutch regulator valve. The TCM controls the solenoid pressure by regulating the exhaust fluid. When the TCM commands the solenoid off, the exhausting fluid is stopped and the 3-5-R pressure is high. When commanded on, the clutch PC solenoid?2 regulates the amount of exhausting transmission fluid. Solenoid power is supplied by the TCM through a high side driver?(HSD). The HSD protects the circuits and components that the TCM powers. Should the circuit overload the driver will shutdown. After the overload is removed the HSD reset.
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