CHECK FOR INTERMITTENT PROBLEMS NOTICE:
Operation History HINT: Operation history: The main body ECU (multiplex network body ECU) records the theft deterrent system operation history, which can be read out using the Techstream. (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Utility / Operation History. (e) Following the instructions on the screen, save the operation history.
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Toyota Tundra Service Manual > Can Communication System: Open in Bus 2 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gatewa ...