[200q20v] Stalling 200 - The rest of it

[C1J1Miller at aol.com]

Well, the TSB seems to say stalling only is an issue with the 1990 on 100 (that's using the .  Any thoughts on why, and would this affect the motronic engine management on the 3B in question?

Only thought I had was perhaps there is a speed signal that is going to ground; but I don't think that is a signal used by the Motronic.  The ECU uses engine speed as an input...
Chris


In a message dated Wed, 28 Feb 2001 10:37:38 AM Eastern Standard Time, QSHIPQ at aol.com writes:

<< Hey guys:
It certainly would appear that the dealer service advisor (in the original 
thread) hasn't errored necessarily, and maybe just had a few points made by 
looking at the TSB Neil put forth.  This is a known problem, I've done a 
couple of these fixes already.  Here is the full monty of the TSB, short of 
the pix pointing to the 2 connectors usually at fault.

HTH

SJ
Subject: Insturment Panel Printed Circuit Board
               Solder Connections, Repairing
Model(s): 100/200    1989-93 m.y.
Group: 90
Number: 93-03
Date: November 15, 1993
Supersedes Technical Bulletin
Group 90, No. 91-02

Condition: 
Speedometer works intermittently or not at all
(all 100/200, from 1989), or engine stalls
intermittently on deceleration (100, from 1990
only), caused by one or more loose or poor
solder connections on the insturment panel
printed circuit boards

Service
While driving tap on instrument cluster, and observe speedometer needle.  If 
the speedometer needle jumps, a loose or poor solder connection may be the 
cause.

Solder Connection Repairing
Obtain Radio security code
Disconnect ground strap
Remove instrument cluster and remove circuit board

Using a magnifying glass, ck upper speedomeeter connector terminals for loose 
or broken solder connections.

Using a magnifying class, ck lower speedometer connnector terminals for loose 
or broken solder connections.

*Do not use a soldering iron larger than 30watts otherwise the circuit board 
will be damaged*

<reassemble>
<Ck for bouncing speedometer after repair.>
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