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 > Air Conditioning System(for Manual Air Conditioning System): ECU Power Source Circuit
DESCRIPTION This circuit provides power to operate the air conditioning amplifier. WIRING DIAGRAM PROCEDURE 1. INSPECT FUSE (ECU-B NO.2) (a) Remove the ECU-B NO.2 fuse from the driver side junction block. (b) Measure the resistance according to the value(s) in the table below. Standard resistance: T ...
