Black plate (19,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012Instruments and Controls 5-19Charging System LightThe charging system light comes onbriefly when the ignition is turnedon, but the engine is not running, asa check to show the light is working.The light turns off when the engineis started. If it does not, have thevehicle serviced by your dealer.If the light stays on, or comes onwhile driving, there may be aproblem with the electrical chargingsystem. Have it checked by yourdealer. Driving while this light is oncould drain the battery.When this light comes on, the DriverInformation Center (DIC) alsodisplays a message.See Battery Voltage and ChargingMessages on page 5‑31.If a short distance must be drivenwith the light on, be sure to turn offall accessories, such as the radioand air conditioner.MalfunctionIndicator LampA computer system called OBD II(On-Board Diagnostics-SecondGeneration) monitors the operationof the vehicle to ensure emissionsare at acceptable levels, to producea cleaner environment. This lightcomes on when the vehicle isplaced in ON/RUN as a check toshow it is working. If it does not,have the vehicle serviced by yourdealer. See Ignition Positions (KeyAccess) on page 9‑16 or IgnitionPositions (Keyless Access) onpage 9‑18 for more information.This light should come on when theignition is on, but the engine is notrunning, as a check to show it isworking. If it does not, have thevehicle serviced by your dealer.If the malfunction indicator lampcomes on and stays on while theengine is running, this indicates thatthere is an OBD II problem andservice is required.
