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Home >> Chevrolet >> 2013 >> Caprice 6.0L Eng VIN 2 >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U2099 >> Circuit/System Description

Circuit/System Description

The body control module (BCM) activates the communication enable relay control circuit, when the ignition key is in ACC, ON or START. The communication enable relay control circuit wakes up the control modules for serial data buss communication.

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