INSPECTION PROCEDURE 1. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
(a) Measure the resistance according to the value(s) in the table below. Standard resistance:
If the result is not as specified, replace the unlock warning switch assembly. Text in Illustration
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Toyota Tundra Service Manual > Audio And Visual System: Illumination for Panel Switch does not Come on with Tail Switch ON
PROCEDURE 1. CHECK VEHICLE SIGNAL (OPERATION CHECK) (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: Light Control Swi ...
