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Home >> Chevrolet >> 2014 >> Volt >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System - DTC B1000 To DTC U183E >> Diagnostic Information and Procedures >> DTC U1814 >> Circuit/System Description

Circuit/System Description

The body control module activates the ignition circuit, when the ignition key is in ACC, ON or START. The ignition circuit wakes up the devices for serial data bus communication.