ALDL Interfaces

[David A. Cooley]

Actually, Field service mode is normal driving mode with the Check engine
light flashing to indicate rich or lean... light flashes at a 1 PPM period,
1/2 on and 1/2 off is stoich... more on than off is rich and more off than
on is lean.


At 07:25 PM 3/16/99 -0500, you wrote:
>In the early ECMs (C3) the mode was selected by a resistance value placed
>between pin A and pin B: 
>Normal mode     (R>=20K ohm)  
>ALDL mode       (R==10K ohm) 
>Backup mode     (R==3.9 K ohm)  
>Field Service   (R<=500 ohm)  
>
>In ALDL a constant 1,000 rpm idle will be commanded
>Backup mode means just that
>Field Service should never be entered unless you know exactly what you are
>doing.
>
>Does that help ?
>
>
>      	A. Padgett Peterson, P.E. Cybernetic Psychophysicist
> Anti-Virus, Cryptographics, & Antique Radio Researcher
>http://www.freivald.org/~padgett/index.html
> mailto:padgett at gdi.net     PGP 5.5 Key on request
>

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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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