[W126 Coupe] aftermarket keyless go questions

[Mike Kelly]

Hi Andrew,

I've looked at the later MB Keyless for my 2002 E55 AMG implant into my '89
560SEC.

I have the gear selector mechanism with the Start/Stop button on the gear
knob and the instrument cluster but when I looked into the matter, it gets
VERY complex.

It seems that MB have made serious efforts to stop the system being
compromised. Plus they are CAN BUS controlled cars.

I'm told that the ignition switch, Central Gateway [into which all
electronic commands are sent and directed out to the appropriate systems]
and the ECU are matched at the factory and these individual units won't
function without the other.

Looking at the E55 AMG 'Keyless Go' function diagram from the WIS, it is
linked to gear stick lockout, gear stick start button, instrument cluster,
steering wheel, ignition switch/steering lock, ECU, electronic throttle,
door lock system and memory system.

I'm sorry if I left out something but it was enough for me to look
elsewhere.

I have fitted simple keyless entry to one of my 928s but I would love to do
the whole Keyless Go thing to my 560SEC whilst all the wiring is under
review.

Mike K

 

From: Andrew Seidel [mailto:sio2usa at yahoo.com] 
Sent: Thursday, 18 March 2010 2:01 PM
To: mbcoupes at mbcoupes.com
Subject: [W126 Coupe] aftermarket keyless go questions

 

Fellow list members,

I'm preparing to install an aftermarket keyless-go system in my '86 560SEC.
Wondering if I understand the schematics and behaviour correctly:

Mechanical input (key) activates an electrical signal(to vacuum pump),
realizing a mechanical response (pnuematic to all locks), resulting in
unlock signal to all inputs of the pump (+12V)to know to shut off, and
informational to the alarm?

 

It seems an aftermarket installation has two choices, as directly grounding
an input to the pump, while mechanically the door locks relays are connected
to +12V, will create a short and blow a fuse: 

(1) install a solenoid connected to the remote alarm/keyless controller on
the driver's side door to realize a mechanical response as if the key had
been used

(2) disconnect an input to the pump at one of the door locks (thus prevent
possibility of short), and re-route this input to be controlled directly by
the alarm/keyless controller--sound correct that I could use any of the
locks?

 

I don't really understand the input from the driver's door (only) lock: pin
3 "lock" output to pin x1/1 of the pump (also tied to GND).  Seems nothing
would happen unless there is a current-sense between x1/1 and the input from
the lock x2/2 --and I don't know what it would be doing based on that
connection?

 

I have an Inwells TM3000UM2 unit--made in China, so cheap and almost
unusable instructions--it will be suprising if it works.  Another thought is
to harvest the factory keyless-go computers , solenoids, etc. from a modern
wreck, though I suspect the features are tightly integrated with some main
computer which would be hard to (electrically) strap its I/O to trick it in
to working inside an SEC, also big $ for a wrecker to let go of a main
computer module.  Anyone seen/figured-out the keyless-go system of a recent
model or looked further in to this?

 

A later challenge is integrating a starter-disable (the '86 factory alarm
doesn't have a disable feature, right?)  Also, a factory "start" button
would be nice, so I only need the transponder and no key, but then I need to
replace the steering wheel lock with a solenoid/control.  Additional
thoughts?

 

Thanks (sorry for long/multiple questions)! 

  

Andrew Seidel
1986 560SEC
1985 500SEC Lorinser
1983 300D Turbo

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.pairlist.net/pipermail/mbcoupes/attachments/20100319/5183a0e0/attachment.htm>