K20 swap wiring problems

K-Series Programmable ECU installation questions / support issues
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Ryry
Posts: 3
Joined: Fri May 25, 2018 10:39 am

K20 swap wiring problems

Post by Ryry »

Needing some help here.....

Just finished swapping a EK with a JDM k20a, did a custom engine harness to ecu(kpro).

I’m pretty sure I’ve mis wired something somewhere, have 2 codes being thrown and cannot figure out what is causing it.
P0113 IAT high sensor voltage
P1108 barometric pressure high voltage

I have checked the wires to IAT & Map sensors and they are good (+5v & grnd)
except I’m seeing ~4.5v from the ecu to the map sensor signal -A19 pin which should not have voltage with the map sensor unplugged( but does)

Have checked engine/ecu grounds and all seems correct

I’m not sure on the ecu schematic for the different power/ground circuits, could I have something miss landed causing this back feeding?
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Spunkster
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Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: K20 swap wiring problems

Post by Spunkster »

The baro sensor is inside the ECU, so if you are getting an error for that, the ECU may be bad.
Ryry
Posts: 3
Joined: Fri May 25, 2018 10:39 am

Re: K20 swap wiring problems

Post by Ryry »

I’m really hoping it’s not, brand new and just trying to start it up for the first time.

Also, checked the wire continuity for the map sensor- all good

Depended the A19 pin and still see ~4.7v out of the ecu.

No matter what I do (map plugged in/A19 depended) kpro always reads -29in for the engine pressure (not running)
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Spunkster
Site Admin
Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: K20 swap wiring problems

Post by Spunkster »

You should try the ECU on a known working vehicle then.
Ryry
Posts: 3
Joined: Fri May 25, 2018 10:39 am

Re: K20 swap wiring problems

Post by Ryry »

Found the problems.....

Had some intermittent connection issues with the IAT,ECT, and MAP sensors, everything was wired correctly.

Found 3 or 4 wires that were badly corroded in the sensor wiring from the original engine harness that I used to build the tucked harness from......all kpro codes cleared.

Lesson learned, use new wiring!
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