DIYPNP - How do I connect wideband to it ? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 12-24-2012, 04:13 PM   #21
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The battery provides power to the Ecu. If you tap the power, the Ecu doesn't provide power top the wbo2.
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Old 12-24-2012, 04:23 PM   #22
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Right, but he's talking about connecting the red to the 12volt on the diypnp board. I don't know that the pc board trace can tgrougput that power without overheating it. If you tap the power wire that's fine... You still want it on switched power that is off during cranking though...

The voltage drop while cranking might just let the smoke out of the wideband controller.
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Old 12-24-2012, 04:31 PM   #23
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No, thats fine.
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Old 12-25-2012, 02:48 PM   #24
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Quote:
Originally Posted by elior77 View Post
Is this correct ?:

12V Red wire connect to 12V on the DIYPNP board
GND Black wire connect to GND on the DIYPNP board
GND White wire connect to GND on the DIYPNP board
O2 Green wire connect to O2 on the DIYPNP board
NB Brown no need to connect
Save yourself from ground offset problems and read my last post.
Power ground goes to engine block.
Sensor ground goes to DIYPNP sensor ground pin.
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Old 12-29-2012, 03:31 PM   #25
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Summary:

12V Red wire connect to ??? (should be live only when the engine is running)
GND Black wire connect to GND on the DIYPNP board
GND White wire connect to engine block
O2 Green wire connect to O2 on the DIYPNP board
NB Brown no need to connect
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Old 12-30-2012, 03:57 PM   #26
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Quote:
Originally Posted by elior77 View Post
Summary:
GND Black wire connect to GND on the DIYPNP board
Connect to SENSOR GROUND PIN, not Power Ground pin (i.e., ground isn't ground isn't ground)
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Old 12-30-2012, 09:09 PM   #27
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Quote:
Originally Posted by JasonC SBB View Post
Bah, black wire signal ground should go to the sensor ground pin on the ECU.
The heater ground should go to the cylinder head or engine block.
I'm starting to wonder if it's even possible for me to give advice without Jason jumping on board to offer a trivially contrarian point of view which adds little of value to the conversation.
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Old 12-30-2012, 11:57 PM   #28
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I think, OP should just go get the MTX-L... less wires, less grounds

but really, it's not really that hard to do, and if there is a bit of a voltage differential, you can somewhat easily tweak the values in Tunerstudio until the AFR's match up.
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Old 12-31-2012, 01:31 AM   #29
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Joe, but it is NOT trivial.
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