Retrieving Body Control Module Diagnostic Trouble Codes: Description

NOTE: Diagnostic Trouble Codes (DTC) 41-45 will only set while in Body Control Module (BCM) diagnostic mode and a button on remote transmitter is pressed. DTCs 42-45 are used to determine performance of remote transmitter and receiver in BCM.

Body Control Module (BCM) is equipped with a self-diagnostic system which detects system failures or abnormalities. When a malfunction occurs, BCM will store a numerical Diagnostic Trouble Code (DTC). DTCs are recorded as current or history/intermittent failures. A current DTC means a fault is present when diagnostic mode is entered. Current DTCs can be identified by number "2" preceding a DTC. For example, 21, 22, 24, etc.

A history DTC means a fault has occurred sometime after DTCs were last cleared from BCM memory. History/intermittent DTCs can be identified by number "3" preceding the DTC. For example, 31, 32, 34, etc. If a history/intermittent DTC is set, fault may be intermittent or system for which DTC is set may not be currently operating. Intermittent DTCs may be caused by problems with electrical circuit. If a visual inspection does not locate problem, vehicle may be driven with a DVOM attached to suspect circuit. Abnormal voltage or resistance readings when problem occurs indicates problem is within that circuit.