2012 Honda Ridgeline Owner's Manual - Page 120
2012 Honda Ridgeline Manual
Page 120 highlights
Remote Transmitter 4. Remove the old battery from the back of the inner cover, and insert a new battery into the back of the cover with the side facing down. BATTERY An improperly disposed of battery can hurt the environment. Always confirm local regulations for battery disposal. 5. Install the parts in reverse order. As required by the FCC: This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Industry Canada Standard RSS-210. Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference that may cause undesired operation of the device. 2. Separate the transmitter by prying its middle seam with your fingernail. 3. Inside the transmitter, separate the inner cover from the keypad by releasing the two tabs on the cover. 112