2007 Dodge Ram 1500 Pickup Owner's Manual - Page 186

186 UNDERSTANDING THE FEATURES OF YOUR VEHICLE NOTE: The default for the compass variance is zone 8. To set the variance: Turn the ignition ON and set the display to "Compass/Temperature." Press and hold the RESET button approximately five seconds. The last variance zone number will be displayed. Press the STEP button to select the new variance zone and press the RESET button to resume normal operation. Outside Temperature Because the ambient temperature sensor is located underhood, engine temperature can influence the displayed temperature, therefore, temperature readings are slowly updated when the vehicle speed is below 20 mph (30 km/h) or during stop and go driving. GARAGE DOOR OPENER - IF EQUIPPED The HomeLink Universal Transceiver replaces up to three remote controls (hand held transmitters) that operate devices such as garage door openers, motorized gates, or home lighting. It triggers these devices at the push of a button. The Universal Transceiver operates off your vehicle's battery and charging system; no batteries are needed.