There are several fusible links in the plastic housing attached to the '+' terminal. Here are some pictures (of a crusty one):
https://forum.ih8mud.com/threads/lx470-fusible-link-box-and-wiring.1201776/
I did headers today. Just got the standard headers and a Hewitt kit and I'm doing the permanent SAI-delete.
I plugged all 8 SAI holes in the cylinder heads with 3/8-16 x 1/2" set screws and used high temperature ceramic threadlocker to keep them...
Partsouq seems to have them in stock. Usually takes 3-4 days to get my order from them (to my front door!). Always beats the dealer in time and price. Even at a few bucks more I will order from them, because the quoted dealer delivery times never...
Your question was how to test the oxygen sensors. That is what the active test is for. The active test allows for increasing / decreasing injector volume by 10%. If the oxygen sensors are functional, it should create a rich (stuck at 0.9V) / lean...
In Techstream under 'active test' you can add or decrease the injector volume by x%. That should force the B1S1 and B2S2 in lean and rich conditions.
The MAF signal on one of the photos is pretty high at 1916 rpm. But Techstream also reports a...
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