NetNews Usenet Archive 1992 #27/NN_1992_27.iso/spool/rec/autos/tech/15475

Internet Message Format | 1992-11-15 | 1.7 KB

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From: [e-mail] (Steve Clift)
Newsgroups: rec.autos.tech
Subject: Bosch LE-2 Jetronic schematics?
Message-ID: <[e-mail]>
Date: 16 Nov 92 01:21:45 GMT
Organization: CSIRO Marine Laboratories, Hobart
Lines: 25
X-Newsreader: TIN [version 1.1 PL6]

I have an LE-2 unit which has a fault - engine fires but won't run.
When set up in a test rig which simulates the engine sensors, the thing
works fine - identical to a known good unit.

Does anyone have, or know where I can get, a schematic for this thing
so I have a chance of figuring out what is wrong with it?  Bosch are
not exactly forthcoming - surprise, surprise!  I can figure out what
some parts of the circuit are doing, but there are other sections I'm
not clear on.  With a schematic, I should be several orders of
magnitude better off.  There are a few Bosch proprietary components on
the circuit card, plus a bunch of standard ICs etc.  If the problem is
one of the standard bits, it should be fixable.

I started tracing out the schematic myself, but the circuit is complex
and the construction technique (single-sided board with tracks that
wander everywhere, plus a zillion links on the component side) makes it
a fairly brain-damaging exercise.

Any clues?

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Steve Clift                   Email: [e-mail]
CSIRO Division of Oceanography           Phone: [phone]
Hobart, Tasmania, Australia           Fax:   [phone]
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