Needed: ECU pinouts

[carotman]

Hi guys, I was wondering is anyone got the ECU pinout for those cars:


88-89 Prelude SI (pk2 ECU)

89 Accord LX-i


I need this for my JDM B20A Project.

Thanks

[smufguy]

what is a pin out?

[carotman]

The description of what the pin on every connector does.

Like (this is an example)
Pin A1:O2 sensor (-)


with this, I'll be able to switch/add wires for my B20A

[night]

i used to have the 89 LXi, pretty sure i saved it but it will take some digging.....

[YK86]

This is out of the 1990 Prelude service manual in the 2.0L section.

And the full version with wire colors.

[YK86]

Sorry, it's a bit big but when I shrunk it down, it become very hard to read even when zoomed in (when it's zoomed, the writing was all blurry).

[carotman]

Thanks for your help Yasu!!!

I just hope that it's the same for the 89, There shouldn't be any problem.

[night]

gonna be some diffs. but im not sure about the B20A. the 88-89 lude was like the accord. 2 O2's and secondary butterflys in the plenum. they ditched that for 90-91

[carotman]

I thought it was the opposite, they had 2 O2 sensors in 90-91 (Pin C16 and B11). However, the chilton maual says they got 2 O2 for 88-89 too.

I'm all mixed up now

I wanted the 88-89 cause I didn't want to switch manifolds on the B20 (because of the 2 )2 sensors

The IAB was present in 89 tough and they had 1 O2


What's the ECU number for Ludes 90-91? I already got the PK2 from an 89 Lude

[carotman]

I just checked the part numbers for the ECU on www.slhondaparts.com

All the 2.0SI Preludes from 88 to 91 use that ECU

37820-PK2-A00

Mine is
37820-PK2-6630

I guess it's because it is a Canadian model.

Also, All years Preludes seem to use a 2 O2 sensor setup (from what the site says)

Anyone can confirm that?

[night]

oh ya. the changes were for the 2.1. forgot they had both the 2.0 and 2.1 in 90-91

[AccordEXI]

All B20A5 Preludes use 2 oxygen sensors.

The 90-91 B21A engines use only 1 O2 sensor as well as a single stage intake. That being said, the 90-91 B21A ECU cannot be used with the JDM B20A since it is OBD-1 and therefore will not plug in to the Accords OBD-0 connectors, unless an adapter is made.

[carotman]

Haaaa that enlightens me!

Thanks AccordEXI

I did do some research and found out that the B21 had no dual stage and used a heater O2 sensor on the downpipe (same location as the 90-93 accords)

So, I DID get the correct ECU.

Now, I was wondering if I can use the B20A distributor and crank sensor or do I need to get the B20A5 ones.


If I can use the B20A parts, does the 86-87 integra distrib cap fits on the B20A distributor.????

If not, does any USDM cap will fit? (and rotor)

Thanks