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If you plan to connect to the ECU on the bench, you will also need to power
it up. There are three pins each where you need to apply ground
(#25, #47, #62) and +12V power (#1, #23, #43). I made this simple
harness with insulated alligator clips.
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Here's a brief guide on how to connect to the CAN bus on a Trionic7 ECU.
CAN bus connection offers a fast and convenient way to read or flash the
firmware in the ECU. However, keep in mind that there's a slight chance it
may fail while writing the memory, especially if you're flashing in the car.
When that happens, you end up with a dead ECU, which no longer responds to
a CAN connection. The only way to revive it in this case is by using a
BDM interface.
Related Links:
ECUProject forums,
T7Suite,
T7Tool,
SaabOpenTech.
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