DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air conditioner / Trouble Codes. (e) Check for DTCs. 2. CLEAR DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air conditioner / Trouble Codes. (e) Clear the DTCs. 3. INDICATOR CHECK 
(a) Press and hold the A/C control AUTO switch and Recirculation / Fresh switch simultaneously, and turn the ignition switch ON. Continue holding the 2 switches until the panel diagnosis mode begins. 
(b) Check that all indicators turn on and off 4 times in succession at 1 second intervals. HINT:
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Toyota Tundra Owners Manual > Operating the lights and
wipers: Automatic High Beam
The Automatic High Beam uses an in-vehicle camera sensor to assess the brightness of streetlights, the lights of vehicles ahead etc., and automatically turns the high beam on or off as necessary. WARNINGâ– Limitations of the Automatic High Beam Do not rely on the Automatic High Beam. Always ...
