Diesel particulate filters (DPF) require routine cleaning to remove ash that builds up over time. Most vehicles using a DPF system will have an on-board filter service monitor to indicate the filter condition and guide your filter cleaning schedule.
In ancient times the islands formed an independent kingdom. Chinese and Japanese sovereignty were successively forced on the archipelago from the 14th to the 19th century, and in 1879 the Ryukyus became an integral part of Japan. After the defeat of Japan (1945) in World War II, the United States took control of the islands.
The Pacific half of World War II, which began with Japan's attack on the American naval base at Pearl Harbor, Hawaii, on December 7, 1941, ended almost four years later when Japan surrendered to American-led allies on September 2, 1945.The surrender came after the United States had dropped two atomic bombs on Japan.y Steve Jones. After suffering devastating casualties at each others' hands during World War II, the U.S. and Japan were able to forge a strong diplomatic alliance.