Add info on wiring for FT86
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@ -68,3 +68,27 @@ Channel name | Equation
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------------ | --------
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Engine oil temperature | C - 40
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Coolant temperature | D - 40
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# Connections
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Besides the CAN pins in the OBD-II port, there is a CAN bus male port hidden
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behind the car multimedia head unit:
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![Hidden CAN port](../images/ft86_hidden_can_connector.jpg)
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It's very close to the glovebox, which makes it great for putting your CAN
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reader in the glovebox. Such a placement makes sure it's out of the way and you
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won't accidentally hit it with your leg while on the track, and also allows
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quick access for troubleshooting and experimenting. There's also a second 12V
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port inside the glovebox, which makes it easy to use a 12V-to-USB adapter
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instead of adding a 12V-to-5V converter to your hardware design.
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You can use the two middle pins of a
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[Toyota radio harness](https://www.amazon.com/gp/product/B0002BEQJ8)
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to connect to the CAN bus in a reliable way.
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It's recommended to use a ~60–90 cm (2–3') twisted pair cable between that port
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and your CAN reader. I would strongly discourage you from using the screw
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terminals on the MCP2515 board, as if the cable comes loose it can cause a short
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circuit in the CAN bus (ask me how I know), which will throw a MIL at best, and
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who knows what at worst if it happens on the track. Instead, I attached a female
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JST SM connector to the cable.
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