OPERATION CHECK CHECK LANE DEPARTURE ALERT MAIN SWITCH (a) Check the lane departure alert main switch (steering pad switch assembly) on/off operation. (1) Turn the ignition switch to ON. (2) Confirm that the lane departure alert indicator (green) in the combination meter assembly illuminates or turns off when the lane departure alert main switch (steering pad switch assembly) is pressed. HINT: The ON/OFF status of the lane departure alert system remains unchanged when the ignition switch is turned off and back to ON. 
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Toyota Tundra Service Manual > 1ur-fe Engine Control: Mass Air Flow Meter
ComponentsCOMPONENTS ILLUSTRATION InspectionINSPECTION PROCEDURE 1. INSPECT MASS AIR FLOW METER (a) Check the output voltage. (1) Apply battery voltage across terminals 1 (+B) and 2 (E2G). NOTICE: While using the battery during inspection, do not bring the positive and negative tester probes too cl ...
