HDP

iTrader: (2)

So, the check engine light does indeed illuminate along with the exh. ovr. heat light by wiring it like you illustrated? So now the issue is getting it to flash when knock and injector duty threshold is exceeded?

fritts

iTrader: (5)

There has to be an output line from the PFC. I have noticed that pins 1V, 1P, 2H and 2A all do not have pins on our harness. But on the PFC side the ECU does have pins for those.

Does the JDM harness interface with the EL Unit the same way the US one does to the exhaust overheat light? I guess I wonder do any of the above pins interface with the lights or the el-unit. I would think an unused pin would have to be used to signal the light. The PFC allows you to adjust the frequency of the flashing and that signal I believe would have to come from the PFC somehow in the form of the same flashing frequency. That is why I'm looking for an unused pin.

Do you think you could post some pictures or a pdf of the wiring diagram? That way we could get several people looking at it?

DaleClark

iTrader: (55)

I'm gonna make a new thread on this topic....

Dale

HDP

iTrader: (2)

Be sure to post the link here.

DaleClark

iTrader: (55)

Thread on deciphering the JDM ECU pinouts -

https://www.rx7club.com/power-fc-forum-47/deciphering-jdm-ecu-pinouts-615909/

Dale

DaleClark

iTrader: (55)

OK, got it working! See the above-referenced thread for more details. Long and short of it - pin 1V is the JDM wire for the overheat warning light. You have to add that wire into your stock harness, as the USDM harness doesn't have a wire at that location. But, it works great - check engine light will blink when you have too much knock or too much duty cycle!

Dale

Noxlupus

Dale, you are DA MAN!!! I don't care what HDP says about you!

HDP

iTrader: (2)

Hey now, you said you wouldn't say anything if I promised not to tell anyone I saw you hugged up with that homeless gay guy...

Noxlupus

Quote:

Originally Posted by HDP

Hey now, you said you wouldn't say anything if I promised not to tell anyone I saw you hugged up with that homeless gay guy...

OMG! You swore yo wouldn't tell!!! And it wasn't a guy thank you very much... she/he... was a hermaphrodite.

Noxlupus

Hey Dale,
I noticed that in your write up here you striped the wires and then soldered the connector. Why not use a Tap-Splice type Connector where there's no need to strip or solder? Just a though.

DaleClark

iTrader: (55)

That would work just fine as well. I usually solder the ECU connections, as it's a more compact connection and I'm pretty good at soldering .

Dale

Noxlupus

Wana come over and solder mine then?

fritts

iTrader: (5)

Dale,
Did you confirm that it blinks on knock or injector duty cycle?

DaleClark

iTrader: (55)

It does blink, and it was definitely for a knock event, as I was monitoring knock on the Commander and saw it go over 60 on the peak/hold.

Dale

fritts

iTrader: (5)

YES YES YES YES YES YES YES!!!!!!!!!!!!!!!!!!!! I love it a little cooperation and we have a knock light.

HDP

iTrader: (2)

Can you please tell me where the wire is on the harness? There is barely adequate light to even see the harness, let alone the colors of the wires.

HDP

iTrader: (2)

Hey Dale... ^

fritts

iTrader: (5)

Have you check to see if that pin goes positive voltage or does it ground the wire. I would like to wire up an LED instead of using the check engine light.

HDP

iTrader: (2)

After looking at the FSM, (still unsure which wire is the O/B) it shows this being an output wire from the E/L unit. Shouldn't the O/B wire be removed/disconnected from the E/L unit entirely before connecting it to the 1V pin on the PFC? Would output signal coming from the PFC cause damage to E/L unit?

DaleClark

iTrader: (55)

Sorry guys - been busy and haven't peeked in on the thread .

It's pin K on the E/L unit. If you go to page B1-B in the wiring diagram, it shows the EL unit and shows the pin order in the connector.

This output wire is basically dead after you remove the stock ECU. I'm not 100% sure if I just tapped into the wire or cut the wire - I'll have to dig around under the dash for that answer. Regardless, it works perfectly in my car, it even turns the Check Engine light on before you start the engine, which will help if you're in an emissions state.

Dale

HDP

iTrader: (2)

Unfortunately, my FSM doesn't have a section "B".

DaleClark

iTrader: (55)

Dang, dude! Buy a real shop manual! Call Ray up and get one comin'!

I'll see if I can't take a pic or something of the wiring.

Dale

HDP

iTrader: (2)

I do have a real one, it just doesn't have the wiring section.

aoc007

iTrader: (5)

Isn't that in the other manual, the electrical manual?

nashman69g

iTrader: (3)

if you look in the WIRING DIAGRAM, located convenitly in the 3rd gen section, you will find section B1-b--and its even in color!! Some great forum member, cough, scanned it in for everyone.