2010 Toyota Highlander Owners Manual - Page 582

6-1. Specifications Ignition system Spark plug Make Gap 2.7 L 4-cylinder (1AR-FE) engine DENSO, SK16HR11 3.5 L V6 (2GR-FE) engine DENSO FK20HR11 0.043 in. (1.1 mm) NOTICE n Iridium-tipped spark plugs Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine. Electrical system Battery 12.6 ⎯ 12.8 V Fully charged 12.2 ⎯ 12.4 V Half charged 11.8 ⎯ 12.0 V Discharged (*: Voltage is checked 20 minutes after the engine and all the lights are turned off) 5 A max. 6 Open voltage* at 68°F (20°C): Charging rates Vehicle specifications 559