DIY-EFI References

Simpson, James H James.Simpson at unisys.com
Mon Aug 7 18:00:38 GMT 2000


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In my quest for information on the RINIX computer system used on the Jeep
4.0 Liter engine circa 1987 ~ 1990, I was able to get a complete Cherokee
wiring diagram & diagnostic manual and a system computer codes manual from
the Mopar manual folks.  All to no avail.  No one makes a code reader that
will talk to this computer system.  No "check engine light" either.  I even
hooked up a protocol analyzer to the output data port on the test connector.
Nothing.  The serial data stream appears to be proprietary.  Since I was
having problems keeping the engine running, that is when I gave up on the
RINIX system.
 
This was all for an engine swap I did into a 1982 Jeep CJ7.  I finally used
the 1994 Wrangler (Mopar) computer system.  The MAP sensor and the injectors
are the same.  I had to change the rest of the sensors  and the
throttle-body to 1994 issue.  The engine runs great now, and a code scanner
is available for this computer.
 
Jim

-----Original Message-----
From: Rita MacNeill [mailto:paulrita at attcanada.ca]
Sent: Monday, August 07, 2000 12:34 AM
To: markw at vehicle.me.berkeley.edu
Subject: DIY-EFI References


Would you have any information on the Jeep Cherokee 1989 Engine Control
Module diagnostic system? I have the pinout but that is about it.  As a
hobbyist challenge, I would like to build a diagnostic analyzer for this
beast. Thanks.


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<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=298154417-07082000>In my 
quest for information on the RINIX computer system used on the Jeep 4.0 Liter 
engine circa 1987 ~ 1990, I was able to get a complete Cherokee wiring diagram 
&amp; diagnostic manual and a system computer codes manual from the Mopar manual 
folks.&nbsp; All to no avail.&nbsp; No one makes a code reader that will talk to 
this computer system.&nbsp; No "check engine light" either.&nbsp; I even hooked 
up a protocol analyzer to the output data port on the test connector.&nbsp; 
Nothing.&nbsp; The serial data stream appears to be proprietary.&nbsp; Since I 
was having problems keeping the engine running, that is when I gave up on the 
RINIX system.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN 
class=298154417-07082000></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=298154417-07082000>This 
was all for an engine swap I did into a 1982 Jeep CJ7.&nbsp; I finally used the 
1994 Wrangler (Mopar) computer system.&nbsp; The MAP sensor and the injectors 
are the same.&nbsp; I had to change the rest of the sensors&nbsp; and the 
throttle-body to 1994 issue.&nbsp; The engine runs great now, and a code scanner 
is available for this computer.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN 
class=298154417-07082000></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN 
class=298154417-07082000>Jim</SPAN></FONT></DIV>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px">
  <DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma 
  size=2>-----Original Message-----<BR><B>From:</B> Rita MacNeill 
  [mailto:paulrita at attcanada.ca]<BR><B>Sent:</B> Monday, August 07, 2000 12:34 
  AM<BR><B>To:</B> markw at vehicle.me.berkeley.edu<BR><B>Subject:</B> DIY-EFI 
  References<BR><BR></DIV></FONT>
  <DIV><FONT face=Arial size=2>Would you have any information on the Jeep 
  Cherokee 1989 Engine Control Module diagnostic system? I have the pinout but 
  that is about it.&nbsp; As a hobbyist challenge, I would like to build a 
  diagnostic analyzer for this beast. 
Thanks.</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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