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 > Air Conditioning System(for Automatic Air Conditioning System): IG Power Source Circuit
DESCRIPTION When the ignition switch is turned ON, positive (+) battery voltage is applied to the air conditioning amplifier. WIRING DIAGRAM PROCEDURE 1. INSPECT FUSE (ECU-IG1 NO.3) (a) Remove the ECU-IG1 NO.3 fuse from the driver side junction block. (b) Measure the resistance according to the valu ...