95 LT1 PCM (16188051) uses a 16202476 MCU !!

[David A. Cooley]

At 11:27 AM 2/17/99 -0800, you wrote:
>"David A. Cooley" wrote:
>> 
>> I have 2 unidentifiable chips, 52 pin PLCC's, one is 56597 and labeled
>> Delco, the other is labeled NCR and is 129170
>
>The ECM for the '95 2.2 L4 "4", 16191947, also uses a 16202476 and a
>56597.  The 16191947  uses a MEMCAL with a 27_512.  I assume the 56597
>is a two injector version of the buffer / I/O port / peak+hold
>controller which all the P4's use.

Delco did send me a brief description of the 56597... it's a "IOD"
Input/Output Device...

>Check the circuitry around the 56597.  Are there two diodes, two 1.8K
>resistors, and two polarized capacitors, all hooked together and to two
>pins of the 56597?  The old single injector controller uses these parts
>to implement a voltage doubler.
>

Nothing but some tiny chip caps and a couple chip resistors.

>Other chips in the 16191947 are:
>     34987  O2 amp

Mine has 2

>     34992  Power supply

Have 1

>     34993  IAC driver

Have 1

>  16045152  CD4011 quad NAND (?)

none

>     45153  CD4051 mux (?)

have 1

>     64606  ALDL interface

have 1

>     04891  ???

Nope

>     89551  ???

Nope

>  16132083  ???

Yep... 1

>  16206550  ???

nope


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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
       I am Pentium of Borg...division is futile...you will be approximated.
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