DESCRIPTION When the battery saving control operates, the main body ECU (multiplex network body ECU) controls the operation of the DOME CUT relay that is built into the driver side junction block assembly to turn off the interior lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure. PROCEDURE
(a) Perform the Active Test according to the display on the Techstream. Click here Main Body
OK: All of the interior lights turn off when ON is selected.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Remove the driver side junction block assembly. Click here
(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Click here (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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Toyota Tundra Service Manual > Navigation System: Display does not Dim when Light Control Switch is Turned ON
PROCEDURE 1. CHECK IMAGE QUALITY SETTING (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 NG TURN "Day Mode" SETTING OFF OK 2. CHECK VEHICLE SIGNAL (OPERATIO ...