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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:
Cruise Control Function Request Circuit
Possible Sensor Faults
Body Control Module
Possible Related Diagnostic Trouble Codes
DTC B3794
Circuit / System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data message to the ECM indicating the status of the cruise control switches.
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