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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Vehicle Access) >> Diagnostic Information and Procedures >> DTC B1023 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The switch that failed and generated this diagnostic trouble code (DTC) is part of the driver door module (DDM) or the passenger door module (PDM). When a switch is activated, the DDM/PDM then either actuates the appropriate component or sends a message over the serial data link to the appropriate module to actuate the appropriate component.

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