Tach access - Mercedes Benz SLK Forum

AMGs For those high performance Mercedes-Benz R170-SLK 32/R171-SLK 55/R172-SLK 55 cars tuned by AMG -

 
LinkBack Thread Tools
#1 Old 02-18-2007
Registered Users
 
Join Date: Feb 2007
Location: Baytown, Texas
Vehicle: SLK55
Other Toys: 05 G55 AMG
Posts: 93
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 36 Times in 10 Posts
(Thread Starter)
Tach access

I'm installing a data acquisition system in my SLK55 and am having trouble finding a place to hook up an input for the tach in the DA system. I've tried tapping into one of the LV leads on one of the coils but the signal is unstable. It reads right most of the time but becoms erratic under acceleration. Does anyone know if there is a remote tach ouput in the ECU or any other place I can get a 12V pulsed signal that is proportional to engine speed?
rb136 is offline  
Sponsored Links
Advertisement
 
#2 Old 02-19-2007
DansSlk
Guest
 
Posts: n/a
Chats:
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
Not sure of any good places to tap off of the top of my head sorry.

No separate output on the ECU its all CANBUS
#3 Old 02-21-2007
Registered Users
 
Join Date: Feb 2007
Location: Baytown, Texas
Vehicle: SLK55
Other Toys: 05 G55 AMG
Posts: 93
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 36 Times in 10 Posts
(Thread Starter)
Figured it out. You have to use shielded wire and route it away from the other coils and fuel injectors. The shielding grounds through the DA system and into the lighter plug where it gets it's power. Signal is clean now.
rb136 is offline  
Sponsored Links
Advertisement
 
Reply

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > General Discussion about Mercedes Benz SLKs > AMGs

Bookmarks

Quick Reply
Message:
Options
Upload your files to MEGAUPLOAD
Upload your images to ImageShack

Register Now



In order to be able to post messages on the Mercedes Benz SLK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone worked out how to access the engineering mode on newer comand systems? aquascape SLK R171 General Discussion 7 12-03-2011 12:57 AM
Access into lighting unit Lizard General Modifications R171 4 01-14-2008 06:58 PM
Easiest Access to the Horn SLKDawg General Modifications R171 5 11-20-2007 11:09 AM
Best access to ACC devlinmc General Modifications R171 19 03-01-2007 10:40 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.