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 > Trailer Brake Control System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Trailer Brake Control Sysytem DTC No. Detection Item INF Code Link C1241 Power Supply Voltage Circuit 81 82 C1245 Acceleration Sensor Output Malfunction - C1380 Stop Light Control Relay Malfunction - C13A9 Brake System Malfunction - C14A0 Slider Switch Circuit 11 12 13 ...