S2000 Engine Management Engine management topics, map and advice.

KPRO4 loosing readiness when turned off.

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Old 05-26-2019, 04:12 PM
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Default KPRO4 loosing readiness when turned off.

All,

I have an AP1 with KPRO4 on PRB ECU .

I have checked power and ground on ECU B connector , pins 21 for battery power and the various brown/yellow grounds.
I have 12v+ when the car is off to these connections.

The diagrams I have seen from the PRB RSX ecu show this DTC power being required from E7.

I cannot trace continuity from B21 to E7 on the HONDATA ecu so I suspect theyve done something else.

I have passed NYS emissions before, but am feeling like the ecu is loosing battery power somewhere.

I can run 1 drive cycle and have all readiness completed. If I turn off the car from the ign switch and start back up I will loose EVAP & my 2 O2s.

Does anyone know where we are keeping the DTC memory happy on the KPRO setup?
Old 05-26-2019, 05:40 PM
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kpro doesn't support the readiness codes for EVAP or secondary o2, are you sure about that?
Old 05-27-2019, 07:59 AM
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Originally Posted by afzan
kpro doesn't support the readiness codes for EVAP or secondary o2, are you sure about that?
@afzan , I was confused with the 2 o2s on the scanner.

Heres what I've got now. The CRK is taken care of.




I can get both O2 - o2 / heater to clear , EVAP will too if I run the car around.





I did shut the car off, cycle back to ign on and scan & the 2 O2 readinesses stayed, only EVAP blinking.

If I let the car sit and then start and scan, I loose all 3 readiness.
Old 05-27-2019, 11:38 AM
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Maybe I've just lost my mind so let this be a blog post...

Imported a PRA map, selected only wideband and let the radio buttons do their own thing.

If I run for a bit the below completes.


Scanner is as follows , even after a good amount of off time.



only ELD and Purge is enabled on KPRO.
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