PROCEDURE
(a) Display the "Display" screen. (b) Turn the light control switch to the tail or head position. (c) Check if "Day Mode" on the display adjustment screen is on. OK: "Day Mode" setting is off
(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal in Operation Check (See page
![]() (b) Check that the display for "TAIL" changes between ON and OFF according to the light control switch operation. OK:
HINT: This display is updated once per second. As a result, it is normal for the display to lag behind the actual switch operation. (c) Check that the display for "ADIM/TCAN" changes between DIM and BRIGHT according to the light control switch operation. OK:
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Toyota Tundra Service Manual > Lighting System: Headlight (HI-BEAM) Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) receives headlight dimmer switch information signals and illuminates the high beam headlights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure. PR ...