Black plate (18,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -2015 - CRC - 10/31/145-18 Instruments and ControlsWarning (Continued)have the vehicle serviced rightaway. See Airbag ReadinessLight on page 5-16 for moreinformation, including importantsafety information.Charging System LightOn some vehicles the chargingsystem light comes on briefly whenthe ignition is turned on, but theengine is not running, as a check toshow the light is working. It shouldgo out when the engine is started.For vehicles with a reconfigurablecluster, this light may not come onwhen the ignition is turned on.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, or isflashing, the Driver InformationCenter (DIC) also displays amessage.See Battery Voltage and ChargingMessages on page 5-36.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, helping tomaintain a clean environment. Themalfunction indicator lamp comeson when the vehicle is placed inService Only Mode, as a check toshow it is working. If it does not,have the vehicle serviced by yourdealer. See Ignition Positions onpage 9-15.If the malfunction indicator lampcomes on while the engine isrunning, this indicates that there isan OBD II problem and diagnosisand service might be required.Malfunctions often are indicated bythe system before any problem isapparent. Being aware of the lightcan prevent more serious damageto the vehicle. This system alsoassists the service technician incorrectly diagnosing anymalfunction.
