2003 Honda Element

This means Hellen
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AndreyB
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2003 Honda Element

Post by AndreyB »

I might be able to borrow a starting & driving 2003 Honda Element on it's last breath. It's loud and there is some talk about only running on three cylinders with a stuck exhaust valve, but so far it moves!

https://raw.githubusercontent.com/wiki/rusefi/rusefi/OEM-Docs/Honda/2003-honda-element-ecu.png whos us ECU and TCU integrated into the same unit.

Dave do know trigger pattern? Do we know anything about transmission control? Do we know _anything_ about this maybe https://en.wikipedia.org/wiki/Honda_K_engine#K24A engine?
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Re: 2003 Honda Element

Post by AndreyB »

ECU is somewhere there

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Re: 2003 Honda Element

Post by AndreyB »

image.png
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https://www.phearable.net/information/tech-area/02-04-prb-rsx-type-s-ecu-pin-out-diagrams.html

Dave says those are smart Denso coilsticks 2 ms dwell will run them pretty hot
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Re: 2003 Honda Element

Post by AndreyB »

I forgot that "most of Honda's automatic transmissions are unusual in that they do not use planetary gears like nearly all other makers" - that makes this project way less interesting :(
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Re: 2003 Honda Element

Post by AndreyB »

No tools are needed to remove Honda Element glove compartment - you can pull those retaining clips more or less with your bare hands.
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In other news: catalytic converter was stolen at some unknown point in the past.
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Re: 2003 Honda Element

Post by AndreyB »

Well, some progress!
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Re: 2003 Honda Element

Post by AndreyB »

Good news I do not have IMRC on this engine

IMRC means Intake Manifold Runner Control

pin B22 IMRC valve position sensor potentiometer wow
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https://my.prostreetonline.com/2014/10/21/dtc-p0661-service-imrc/
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Re: 2003 Honda Element

Post by AndreyB »

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Re: 2003 Honda Element

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Need help locating TDC on this exhaust cam wheel.
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Re: 2003 Honda Element

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Re: 2003 Honda Element

Post by AndreyB »

https://github.com/rusefi/rusefi_documentation/tree/master/OEM-Docs/Honda/2003-element/digital

Sweet data: logic analyzer capture of all three position sensors while cranking with zero spark plugs, with three spark plugs and with four spark plugs.
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Re: 2003 Honda Element

Post by AndreyB »

VTC control which I believe is Honda speak for VVT does not work

I have intake cam postion pretty steady at steady RPM and change on accel/decel. I believe that intake position decoding is fine.

I have PID output changing from 10% to 90% on Proteus high side #2 and simply no response. What would be my next step to investigate this assuming electrical problem?

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Re: 2003 Honda Element

Post by blundar »

***VTEC*** / VTS is a high side drive. (variable lift / lock additional cam lobe to change profile / engage all 16 valves depending on implementation)

***VTC*** / VVT is low side drive AFAIK.
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Re: 2003 Honda Element

Post by AndreyB »

blundar wrote:
Sun Oct 31, 2021 5:17 pm
***VTC*** / VVT is low side drive AFAIK.
looks like those are both _same_. And same _high side_?
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Re: 2003 Honda Element

Post by AndreyB »

it works! I originally forgot to set output frequency, also needed more aggressive PID offset and P-factor

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Re: 2003 Honda Element

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Re: 2003 Honda Element

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