22 GPS Navigation Instruction ManualDiagnostics (ecoRoute HD)When your ecoRoute HD is connected, it candetect select diagnostic trouble codes (DTC)related to your vehicle's emissions system, if theon-board diagnostic system detects a fault.1 Touch Tools > ecoRoute > Diagnostics.2 Touch an error code to view its meaning.⁄• Consult your vehicle repair technician for additionaldetails for DTC reported by the system.Clearing Error Codes (ecoRoute HD)Touch Tools > ecoRoute > Diagnostics > Resetto clear error codes noted by the system.⁄• Not all vehicles will allow you to reset error codes.• Clearing error codes without repairing the source of theerro may result in a return of the check engine light.Consult your vehicle repair technician for additionaldetails.Gauges (ecoRoute HD)View real-time information about your vehicle,such as RPM and battery voltage.Touch Tools > ecoRoute > Gauges.⁄• The information displayed on the gauges page iscollected from your vehicle. Garmin is not responsible forthe content displayed on the gauges page. The gaugesthat are displayed may vary by vehicle.Changing the Gauges (ecoRoute HD)You can change the data displayed in the gauges.1 Touch Tools > ecoRoute > Gauges.2 Touch the gauge you want to change.3 Touch a data type.Viewing Driving TipsTouch Tools > ecoRoute > Tips.Setting Routes that Use Less Fuel1 Touch Settings > Navigation > RoutePreference.2 Select Less Fuel.Using ecoRoute