Charging System

The charging system telltale is turned ON by the cluster when it receives a command from the body control module (BCM). The engine control module (ECM) sends a message to the BCM over the CAN serial data link. This indicates to the operator of the vehicle that there is a possible problem in the charging circuit.

The charging system telltale will turn ON, for approximately 3 seconds, during engine start-up until the ECM senses voltage output by the generator for a system check.