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Diagnostic Trouble Codes Warning

IMPORTANT
Do NOT replace the Body Function Controller (BFC) unless a Diagnostic Trouble Code (DTC) remains Current after all DTC tables have been executed. NEVER replace the Body Function Controller (BFC) based on History codes.

The Body Function Controller (BFC) and the Electronic Brake Control Module (EBCM) are connected to the Class 2 serial data link and are capable of setting Diagnostic Trouble Codes. The history DTC codes (a history DTC is a current DTC fault that disappears in the next ignition cycle) can be especially useful in diagnosing an intermittent problem. An explanation of these are given below in Diagnostic Trouble Codes (DTC) TABLE #13.
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