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Home >> Pontiac >> 2007 >> Torrent AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Computer/Integrating Systems) >> Diagnostic Information and Procedures >> DTC U2100 >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2006 Pontiac Torrent and 2006 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

Modules connected to the GMLAN serial data circuit monitor for serial data communications on the GMLAN network during normal vehicle operation. Operating information and commands are exchanged among the modules. The body control module (BCM) maintains a transmit error counter (TEC) and a receive error counter (REC). The counter values increase with detected errors and will decrease with error-free messages. If the TEC value exceeds 255 the BCM removes itself from the high speed GMLAN network and a DTC U2100 will be set.

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