GS400, LS400 & SC400

Remove engine cover. For VVT sensor at bank No. 1, disconnect engine wire protector from upper intake manifold and bearing cap. For VVT sensor at bank No. 2, remove air cleaner intake hose. See VARIABLE VALVE TIMING SENSOR in REMOVE/INSTALL/OVERHAUL article. Remove Variable Valve Timing (VVT) sensors located at top center of each cylinder head. Disconnect VVT sensor connector. Measure resistance between VVT sensor terminals. Resistance should be 835-1400 ohms at 14-122°F (-10-50°C), or 1060-1645 ohms at 122-212°F (50-100°C). If resistance is not as specified, replace VVT sensor.