PROCEDURE
(a) Reset the display settings (contrast and brightness) and check that the screen appears normal. OK: The display returns to normal.
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Toyota Tundra Service Manual > Can Communication System: Precaution
PRECAUTION CAN COMMUNICATION SYSTEM TROUBLESHOOTING (a) Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output. Click here PRECAUTION FOR STEERING SYSTE ...