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Diagnostic Trouble Code: B1261

Diagnostic Trouble Code Name: Solar Radiation Sensor Circuit Short To Ground. Input held at less than 0.17V, External Fault

Vehicle Make: Ford

Vehicle Model: Falcon (BF)

Diagnostic Code Entered By: ZerOne

Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm

Please Note: The DTC Information provided has been randomly generated.

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Diagnostic Trouble Code Description: 

Knock Sensor 2 Circuit

Possible Sensor Faults
ECM

Possible Related Diagnostic Trouble Codes
DTC P0325, P0326, P0330, or P0331

Circuit / System Description
The knock sensor (KS) enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The KS produces an AC voltage signal that varies depending on the vibration level during engine operation. The ECM adjusts the spark timing based on the amplitude and the frequency of the KS signal. The ECM receives the KS signal through a signal circuit. The ECM supples a ground circuit to the KS through a low reference circuit. The ECM also supplies a shielded ground circuit to the KS. The ECM learns a KS noise level at idle and uses calibrated values for the rest of the engine speed range. The ECM should monitor a normal KS signal within the noise channel. The circuits between the KS sensor and the ECM consist of the following circuits: