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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Retrieving Body Control Module Diagnostic Trouble Codes: Description

Use the Manual With the Right Hardware

When to See a Mechanic

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