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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 318 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Liftgate Ajar Indicator Malfunction (RPO TB7) >> Circuit/System Description

Circuit/System Description

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The body control module (BCM) receives an input from the liftgate ajar switch. The ajar switch is normally open when the liftgate is fully closed. When the liftgate is opened, the ajar switch contacts close providing a path to ground. The driver information center (DIC) located at the bottom of the instrument panel cluster (IPC), illuminates the REAR ACCESS OPEN message when the liftgate is open. The IPC receives a serial data message from the BCM indicating the liftgate ajar status.

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