SERVICE NO. 1227277 1.8L AUT TBI 16059788 BZY

[Ludis Langens]

Peter Gargano wrote:
> 
> I have some photos of the PCB (component + solder side) at:
> 
>    http://www.techedge.com.au/vehicle/gm277.htm
> 
> Also, there's a list of the Delco part numbers. I'd be appreciative
> if anyone can shed some light on this ECU.

The pictures show that your '7277 uses the same PCB as a '7165 I've got
here.  (It even has the same white jumper wire!)  Previously, it has
been determined that the '7165 and '7808 both use the same PCB.  So, the
'7277 and '7808 both must use the same PCB.

The difference is in what chip locations are populated.  Your '7277 is
missing the O2 amplifier (20 pin chip) and the high speed ALDL
driver/receiver (28 pin chip).  The '7165 has both.  I'm told the '7808
is missing just the ALDL chip.  And oh, the '7165 comes in a longer case
leaving space for a bunch of air.

A related ECM is the 1227303.  It's like the '7165 except it is missing
one of the quad driver chips, and it uses a short case.  The '7303 was
used in the Korean made Pontiac LeMans.

> Also, what is the US version (if it exists) of the GM "J-Car" and
> what ECU did it use?

Chevy Cavalier, Pontiac Sunbird, Buick Skylark, ???.  The ECM depends
upon the engine and model year.  The J cars have come with the 1.8/2.0
OHC w/ optional turbo, the 2.0/2.2 OHV, the 2.8/3.1 V6, and maybe other engines.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/