B1447 CHEVROLET – Backup Power Source

B1447 CHEVROLET Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B1447 CHEVROLET Possible Causes

Faulty Communication Interface Module (CIM),Communication Interface Module (CIM) harness is open or shorted,Communication Interface Module (CIM) circuit poor electrical connection

B1447 CHEVROLET Description

The Back-up Battery (BUB) provides voltage to the Communication Interface Module (CIM), to be able to successfully place a call in the event of a main battery disconnect during a collision event. The OBDII codes set when the detects no voltage from the back-up battery.