PROCEDURE
(a) Check that the display is not in screen off mode. OK: The display setting is not in screen off mode.
(a) Check that the screen color quality can be set. OK: Setting is possible.
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Toyota Tundra Service Manual > Sfi System: Random Access Memory (RAM) (P0604)
DESCRIPTION The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. This is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect the Random Access Memory (RAM) errors. If outputs from these CPUs are different and devi ...