Re: OBDII Link Error in '01 Tundra w/ 3.4
I'd be checking the power and grounds on the OBD2 connector and seeing if the ISO 9141 K communication line on your pre-2005 Tundra (pin 7) is getting to the ECU via an ohmmeter when the car is off (possibly with the battery disconnected to make sure the line isn't driven to a static voltage).
Of course, you'll need a wiring diagram to see where it connects to the ECU. I don't have one immediately available, but maybe another member here can provide one.
"Laughter is the best medicine. But, if you're laughing without any reason, you need medicine."
How to perform a search: Select "Advanced Search" -> Choose the "Single Search Content Type" tab, Enter the "Keyword", Select Search in Forum "1st Gen Tundra", Search by Prefix "any thread", Show results as: Choose either "Posts" or "Threads", then click on "Search Now".