PROCEDURE
(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. Result
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Toyota Tundra Service Manual > Meter / Gauge System: Lost Communication with Brake System Control Module (U0129)
DESCRIPTION The combination meter communicates with the skid control ECU via the CAN line. DTC Code DTC Detection Condition Trouble Area U0129 When either of following conditions is detected: 15 seconds have elapsed since engine started and IG voltage 10.5 V or more No communication with skid contro ...