2010 Acura RDX Owner's Manual - Page 379

Starting the Engine Your vehicle has an electric vacuum pump located in the engine compartment. When you drive in cold weather or thinner air at high altitude, the electric vacuum pump operates more frequently after the engine is started. When the electric vacuum pump is in operation, it makes some mechanical noises come from the engine compartment. This is normal. Driving Check Starter System Message Canada U.S. If there is a problem with the starter system, you will see a ''CHECK STARTER SYSTEM'' message on the multi-information display when the ignition switch is turned to the ON (II) position. You will also see this message when the auto control mode of the starter system has a problem. If this message is on, the ignition switch has to be held in the START (III) position manually until the engine starts. The ignition switch can be held in that position up to 15 seconds. Even though you may be able to start the engine manually without the auto control mode of the starter system, have your dealer inspect your vehicle. 375 2010 RDX