I'm wondering if that is a mistake in the diagram there, because it is the only reference to pin 4 in 2D in all of the PDFs. Here is a thought, go find that wire, see if it acutaly does exist, and meter it in continuity with pin 4 in 2L, if that diagram is true, it should be connected.
2004 Solara V6 SE
2005 4Runner V6 Sport
1996 Camry I4

2005 4Runner V6 Sport
1996 Camry I4

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[SMAN] - SolaraGuy Driver
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