I need some help with SRS codes & what or how to fix.

I have a 2003 Toyota Tacoma TRD - Prerunner. The other day my SRS dash light starts flashing/blinking. I ran it thru my tester & this is what came up: ( In order )

1) B0133
2) B0106
3) Same as #1. B0133
4) B1100
Now I did get a print out of Diagnostic Trouble code chart. But that just gives you an area. I was hoping to narrow it down a bit. Also I've tried the cleaning of some of the connections I've read about. My truck is exceptionally clean. I don't cram stuff under my seats. But it is 21yrs old & almost 300,000 orig. mi. So I do not want to take it into the dealer & spend a fortune in repairs or replacement.
Thank you for any help

 

Look for the sticky thread at the top of this forum and find the FSM in pdf format (Factory Service Manual) it will have those pages referenced in the chart.

DI-643 = cib01336
DI-261 = cib01065
DI-659 = cib11003

Each one of those files is a few pages long, otherwise I'd post the relevant parts here.

You'll have to work through each of the troubleshooting steps, as those codes are across the entire range of the SRS system.