Jetta TDI Remote Start
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=48982
Printed Date: May 10, 2024 at 8:02 AM
Topic: Jetta TDI Remote Start
Posted By: spdowell
Subject: Jetta TDI Remote Start
Date Posted: January 30, 2005 at 9:59 PM
Where can I find the tach signal on a 2003 VW Jetta TDI? I have the wire already ran to to engine compartment, now I just need the wire! Hope someone can help me, Thanks!
Replies:
Posted By: italnpimp59
Date Posted: January 30, 2005 at 10:07 PM
go to the fuel injector and get the wire that is not RED / purple or brown. this is off DEI tech sheet...but always use your meter to make sure its the right wire.
-------------
Posted By: spdowell
Date Posted: January 31, 2005 at 12:21 AM
Is that for a TDI? I've tried them and I don't believe I cand find it. I thought I had it, but when I tried to program it the LED never came on. Does anyone who has installed one on a TDI know exactly which wire to connect it to and where? Thanks for the help
Posted By: jazzy95tsi
Date Posted: January 31, 2005 at 8:17 AM
Try either pin#102 brown wire or #110 white wire @ the ECM under the wiper cowl. Hope that helps. ------------- Jeff 
Posted By: jazzy95tsi
Date Posted: January 31, 2005 at 8:21 AM
I forgot to mention that those are in the 121 pin or the large ECM connector. ------------- Jeff
Posted By: gus1
Date Posted: January 31, 2005 at 12:28 PM
There's no electronic injectors on a TDI.... it's a Diesel... ALH motor has mechanical injectors.
A nice, clean easy tach source is at the front of the motor, to the left of the oil filter housing, below the vaccuum resevoir ball. There is a 3 pin connector containing a black, a brown, and a white wire. The white wire is the one you will want. If you really really want to go ECM diving, then tach is light GREEN/ orange in the left connector (as you face the ECM). Where is the ECM, you may ask?? Look through the slots in the black plastic piece under the wipers..... dead centre.... there it is.
Gus
-------------
Wherever I go, that is where I end up......
Posted By: jazzy95tsi
Date Posted: January 31, 2005 at 1:51 PM
Those are the same wires from the engine speed sensor, and BTW VW ECM's are cake. ------------- Jeff
Posted By: gus1
Date Posted: January 31, 2005 at 3:16 PM
I didn;t say it was hard to get at.... just a PITA. Pull wipers, hope you don't crack the cover for the cabin air filter, don't press the cover back into the locking strip at the base of the windshield too hard (it may crack the windshield).... fun stuff. At front of motor is easy.... one less thing to take apart.
New PD TDI's tach is at the head.... yay for electronically controlled unit injectors.
Gus
PS: I have owned 3 TDI's.... great car, really easy to hop up, and still 50MPG!
-------------
Wherever I go, that is where I end up......
Posted By: spdowell
Date Posted: January 31, 2005 at 3:51 PM
Gus- what did you do to mod it? Just injectors, etc.? I think I'm going to grab the one from the front of the engine; wouldn't want to crack the windshield. Whats a PD TDI by the way? I don't know what the PD is. Thanks for the help I'll hook it up and see if I can program the unit with it.
sean
Posted By: gus1
Date Posted: January 31, 2005 at 5:39 PM
Head over to tdiclub.com..... lots and lots of good stuff over there for the TDI inclined. Mods, fixes, maintenence, etc. These cars are great maintenence wise as far as 99% of it is DIY, if you are so inclined.
A PD TDI is the latest version of the TDI... uses unit injectors instead of a rotary distribution pump and mechanical injectors. Quieter, easier to hop up, and comes stock with more power. 100Hp at the wheels, and almost 200ft-lbs of tourque.
Gus
-------------
Wherever I go, that is where I end up......
Posted By: DUTCHTOUCH
Date Posted: February 01, 2005 at 12:52 AM
On most Diesel VW's there is this little plastic vacum ball in the engine compartment usually near the front of the engine (drivers side). Underneith it are a couple of plugs. One of them has 3 little wires one of those wires is your tach signal. Not sure what the wire color is off the top of my head, but it should be there. Remember that your tach signal is a AC signal but you can check it with your mulitmeter on the pulsed DC setting. Hope this helps, Dutch ------------- First Class M.E.C.P. Certified & 310K Licensed
Electronic Installer
|